docs(2meet-data-optimizer): correct the 1.4.0 upgrade step for the copy index

- Replace the index only on tables listed in tmdo_post_status_columns
  (ALTER ADD idx_post_status_date_id / DROP idx_post_status_date)
- Warn that `wp tmdo post-status-sync` also adds and backfills copy
  columns on every other post group (large ALTER + UPDATE)
- Found in the 2.4 rollout (dev21: aeav_only, over ten million posts)

2meet-data-optimizer.php

@@ -3,7 +3,7 @@
  * Plugin Name:       2meet Data Optimizer
  * Plugin URI:        https://2meet.io/2meet-data-optimizer
  * Description:       通用 WordPress 反 EAV 引擎：將 postmeta / usermeta / termmeta / commentmeta 自動分流至四象限扁平表（Hot / Warm / Cold / Archive），大幅提升搜尋與篩選效能。從 wp-data-optimizer v2.16.0 提煉的純核心，整合層交給 11 個 AddOn。
- * Version:           1.0.2
+ * Version:           1.4.0
  * Requires at least: 6.0
  * Tested up to:      6.9.4
  * Requires PHP:      8.1
@@ -26,7 +26,7 @@ if ( ! defined( 'ABSPATH' ) ) {
 }
 
 // ── Constants ──────────────────────────────────────────────────────────────
-define( 'TMDO_VERSION', '1.0.2' );
+define( 'TMDO_VERSION', '1.4.0' );
 define( 'TMDO_DB_VERSION', '2.1.0' );
 define( 'TMDO_PATH', plugin_dir_path( __FILE__ ) );
 define( 'TMDO_URL', plugin_dir_url( __FILE__ ) );
@@ -234,6 +234,7 @@ require_once TMDO_PATH . 'includes/class-tmdo-rest-api.php';
 // ── v2.0.0 Engine + Adapters + Modules ───────────────────────────────────
 require_once TMDO_PATH . 'includes/engine/class-tmdo-type-caster.php';
 require_once TMDO_PATH . 'includes/engine/class-tmdo-mode-manager.php';
+require_once TMDO_PATH . 'includes/engine/class-tmdo-promotion-guard.php';
 require_once TMDO_PATH . 'includes/engine/class-tmdo-audit-logger.php';
 require_once TMDO_PATH . 'includes/engine/class-tmdo-shadow-diff-logger.php';
 require_once TMDO_PATH . 'includes/engine/class-tmdo-conflict-detector.php';
@@ -260,12 +261,14 @@ require_once TMDO_PATH . 'includes/migration/class-tmdo-migration-orchestrator.p
 require_once TMDO_PATH . 'includes/migration/class-tmdo-post-migration.php';
 require_once TMDO_PATH . 'includes/migration/class-tmdo-post-group-reconciler.php';
 require_once TMDO_PATH . 'includes/migration/class-tmdo-native-restorer.php';
+require_once TMDO_PATH . 'includes/migration/class-tmdo-array-literal-repair.php';
 add_action( TMDO_Migration_Orchestrator::CRON_HOOK, array( 'TMDO_Migration_Orchestrator', 'cron_tick' ) );
 add_action( 'wpdo_bridge_mode_changed', array( 'TMDO_Migration_Orchestrator', 'bust_attention_cache' ) );
 add_action( 'tmdo_bridge_mode_changed', array( 'TMDO_Migration_Orchestrator', 'bust_attention_cache' ) );
 require_once TMDO_PATH . 'includes/class-tmdo-user-stress-tester.php';
 require_once TMDO_PATH . 'includes/class-tmdo-post-stress-tester.php';
 require_once TMDO_PATH . 'includes/class-tmdo-post-shadow-verifier.php';
+require_once TMDO_PATH . 'includes/diagnostic/class-tmdo-drift-check.php';
 require_once TMDO_PATH . 'includes/engine/class-tmdo-auto-promoter.php';
 require_once TMDO_PATH . 'includes/engine/class-tmdo-hook-bus.php';
 require_once TMDO_PATH . 'includes/engine/class-tmdo-post-status-sync.php';
@@ -292,6 +295,8 @@ if ( is_admin() ) {
 	TMDO_Deprecated_Addons_Notice::register();
 	require_once TMDO_PATH . 'admin/class-tmdo-missing-addons-notice.php';
 	TMDO_Missing_Addons_Notice::register();
+	require_once TMDO_PATH . 'admin/class-tmdo-promotion-guard-notice.php';
+	TMDO_Promotion_Guard_Notice::register();
 }
 
 // ── WP-CLI ─────────────────────────────────────────────────────────────────

CHANGELOG.md

@@ -7,6 +7,272 @@ Versioning follows [Semantic Versioning](https://semver.org/).
 
 ---
 
+## [1.4.0] — 2026-09-28 — 百萬級 listing 的路由排序與日期查詢（hardening 2.4）
+
+**性質**：效能 + 修正。無 schema 變更；post status/date 副本的索引改為三欄（見「升級後」）。
+搭配 HivePress AddOn 0.5.0。來源：dev36 第 3 階壓測（130 萬 listing、121 萬 product、6.2 萬 vendor）。
+
+### Changed
+
+- **flat-first 排序讀 flat 的 post_id 作 tie-break**：`posts.ID` 的 tie-break（ours 與外掛追加的）
+  改讀相等的 `flat.post_id`，方向與排序一致且只出現一次；group 宣告的索引可以 adapter 的
+  entity id 欄結尾，`(欄, post_id)` 索引可直接依序讀取、不需 filesort（主查詢 850 ms → 2 ms）。
+  同值的順序改為依 ID 與排序同方向（原生為 ID DESC）；集合、總數不變，翻頁穩定。（PR-118）
+- **沒有 value 的 meta 條件以 EXISTS 路由**：clause 沒有 `value` 時（HivePress 的精選 listing
+  查詢）視同 EXISTS；只帶 `meta_key`、沒有 `meta_value` 也不以 meta_value 排序的查詢亦同；
+  沒有被 orderby 引用的排序形狀 group 直接移除。HivePress 每個搜尋頁都會跑的精選 listing
+  查詢（`orderby rand`）改走扁平表：2.26 s → 0.2 s。（PR-122）
+- **status/date copy route 在 LIMIT 停下**：只有扁平表一個 JOIN 時去掉 WordPress 的
+  `GROUP BY posts.ID`，`posts.ID` tie-break 改讀 `flat.post_id`（各自保留方向、重複合併）；副本索引改為
+  `idx_post_status_date_id (post_status, post_date, post_id)`，取代兩欄的 `idx_post_status_date`。
+  dev36 價格區間（130 萬中 23.5 萬筆符合）主查詢 1.7 s → 3 ms，頁面 2.7 s → 0.34 s。（PR-128）
+
+### Fixed
+
+- 遷移引擎（backfill、`drift-check --fix`）以 REPLACE 重建 post 列時保留 `post_status` /
+  `post_date` 副本；原本重建後為 NULL，一筆 NULL 就讓整個 group 關閉 copy route。（PR-127）
+- 遷移引擎重建 post 列後遞增路由計數版本（每次呼叫／每批一次，dry run 不遞增），
+  修正後的 found rows 不再沿用舊的快取計數。（PR-129）
+
+### Dev
+
+- live 測試工具（`mut.php`、`qbench.php`）不再清空物件快取（Redis Object Cache 以伺服器端腳本
+  掃描，會卡住共用 Redis 5–20 s）。（PR-123）
+
+### 升級後
+
+- 只需替換索引：對 `tmdo_post_status_columns` 列出的每個 group 表執行
+  `ALTER TABLE <表> ADD INDEX idx_post_status_date_id (post_status, post_date, post_id), DROP INDEX idx_post_status_date`
+  （空表瞬間完成，dev36 130 萬列約 5 s）。未替換前 copy route 照常運作，只是維持 1.3.0 的速度。
+- **不要為了換索引執行 `wp tmdo post-status-sync`**：它除了替換索引，還會替**所有**尚未有副本的
+  post group 加上 `post_status` / `post_date` 欄位並逐列回填（大表 ALTER + 全表 UPDATE；dev36
+  130 萬列約 75 s，上千萬列的站更久）。只有要讓更多 group 啟用 copy route 時才執行，並先在
+  離峰時段以 `--dry-run` 確認列數。
+- 效能數字（dev36 前台，routed）：價格區間 0.34 s、價格排序 0.37 s、時薪排序 0.35 s、
+  評分排序 0.51 s、關鍵字 + 價格 0.59 s（原生 6–43 s）。
+
+---
+
+## [1.3.0] — 2026-09-27 — 大表索引、路由計數與稽核修正（hardening 2.3）
+
+**性質**：效能 + 稽核修正。無 schema 變更（宣告的複合索引以 ALTER ADD INDEX 就地加上）。
+搭配 HivePress AddOn 0.4.0、WooCommerce AddOn 0.3.0。來源：dev36 規模壓測（90 萬 listing）
+與系列稽核（2026-09-27）。
+
+### Changed
+
+- **group 宣告的複合索引只在 WP-CLI 或 WP-Cron 加上**：網頁請求（包括 auth_redirect 之前的
+  `/wp-admin/` 與 `admin-post.php`）改排單次事件 `tmdo_ensure_group_indexes`；以 MySQL
+  `GET_LOCK` 保證同一時間只有一個程序執行 ALTER；每個 ALTER 都成功才記錄已套用，失敗記
+  `schema.index_failed` 並保留在 `doctor` 的 `[INDEX]` 待辦；新表在 CREATE TABLE 時就帶上
+  索引。filter：`tmdo_schema_ddl_allowed`。dev36 90 萬列加兩個索引約 4.7 s。（PR-090a）
+- **路由搜尋的 found rows**：帶 `post__not_in` 的查詢（HivePress 每頁送一組隨機排除清單）
+  改為「不含排除條件的 COUNT（快取）」減去「排除清單中符合條件的篇數（主鍵查詢）」，結果
+  精確，快取不再被打散。（PR-091）快取 key 另外去掉 wpdb 替 `%` 產生的 placeholder escape
+  （每個請求不同，關鍵字搜尋原本永遠不命中，也就是 2.2 驗收「關鍵字 + 篩選 routed 較慢」的
+  原因）（PR-116）；計數改跟隨自有的 `tmdo_posts` last_changed（文章儲存／刪除、經 Hook Bus
+  的扁平寫入）與 terms 的 last_changed，不再跟隨 posts 的 last_changed——任何 post meta 寫入
+  都會推動它，dev36 的 Blocksy 佈景在爬蟲瀏覽每篇 listing 時都寫一筆 meta，快取幾秒就失效
+  （PR-117）。dev36 關鍵字 + 價格 routed 9.8 s → 首次後約 5.5 s（原生 5.0–6.2 s，剩餘為
+  WordPress 核心的 LIKE 全表掃描）。
+- `POST /wpdo/v1/listings/{id}/view` 被限流擋下時，`wpdo_rl_stats` 改為 1/10 抽樣寫入
+  （每次 +10），匿名請求不再 1:1 放大成 option 寫入。（PR-094）
+- `TMDO_Logger::info()` 只在 `WP_DEBUG_LOG` 時寫 error_log（filter `tmdo_log_info`）；
+  `notice()` 一律寫入，模式切換（`bridge_mode_changed`）與快照刪除改用它，保留操作紀錄；
+  `debug()`、`warning()`、`error()` 不變。（PR-095、PR-113）
+- 公開 listings REST 一律不輸出名稱像 email、phone、address、IP 的欄位，即使宣告
+  `show_in_rest`。（PR-096）
+- **既有扁平表的 schema 升級只在 WP-CLI 或 WP-Cron 執行**：網頁請求遇到定義變更時記入
+  `tmdo_schema_deferred` 並排 `tmdo_ensure_group_indexes`；升級前該 group 的 key 走原生
+  （Hook Bus 不攔、router 不路由），升級後排 `tmdo_drift_resync` 補回期間跳過的扁平寫入。
+  新表照常立即建立；aeav_only 仍立即升級（扁平表是唯一副本）；`doctor` 顯示 `[SCHEMA]`。（PR-107）
+  驗收審查後補強：既有表的升級與索引共用同一把 `GET_LOCK`（匿名 `/wp-cron.php` 也會通過
+  `ddl_allowed()`），取得鎖後重新比對 hash；延後的 group 要等 drift fix 完成才改回扁平表；
+  寫入扁平表的 entity 新建 group 表時同樣先走原生，由 drift fix 從原生填滿（新宣告的
+  HivePress 屬性不會把搜尋導到空表）；定義還原時解除延後；cron 事件本身也會升級延後的表
+  （`ALTERNATE_WP_CRON`）；dbDelta 之後每個欄位都存在才記錄定義（否則 `schema.upgrade_failed`
+  並重試）；延後期間 `direct_read()` 回傳原生值。（PR-111、PR-114）
+- 讀寫分離（HyperDB、LudicrousDB）時，取索引鎖前先 `send_reads_to_masters()`，
+  `GET_LOCK` 才會在 primary 上。（PR-108）
+- Cold 快取的「清除」改為遞增版本號（`wpdo_cold_cache_version`），不再呼叫
+  `wp_cache_flush_group()`（Redis Object Cache 以伺服器端腳本掃描整個 group，大 group 會卡住
+  Redis）；舊 key 依 TTL 過期。（PR-110）
+
+### Fixed
+
+- 後台主頁與設定精靈第 4 步的表單改在 `load-{page}`（輸出前）處理，`wp_safe_redirect()`
+  可以正常生效；精靈快照失敗改以 `snap_failed=1` 導回。（PR-097）
+- `uninstall.php` 的全域變數加上 `$wpdo_` 前綴（WordPress.org Plugin Check）。（PR-098）
+- 扁平表已被刪除的 group 不再留在 `tmdo_post_status_columns`：每次文章狀態變更都 UPDATE
+  不存在的表並印出 DB error。（PR-106）
+
+### Security（已驗證，無程式變更）
+
+- 快照目錄在 nginx 下的外洩風險（稽核 Medium）：快照檔名含 64-bit 隨機值、遷移備份檔名含
+  12 字元隨機 job id，目錄有 index.php 擋列表；`doctor` 的 HTTP 探測與 nginx 後台提示已存在。
+  dev31 探測全為 403。不採用「目錄名加隨機後綴」：各站 nginx deny 規則比對 `wpdo-backups/`，
+  改名反而讓新快照脫離保護。（PR-093）
+
+### 升級後
+
+- 部署後第一個 WP-CLI 指令或 WP-Cron 會為 HivePress AddOn 0.4.0 宣告的索引執行 ALTER
+  （90 萬列約 5 s）；`DISABLE_WP_CRON` 且沒有系統 cron 的站，執行一次 `wp tmdo doctor` 即可。
+- CLI 輸出不再夾帶 `[WPDO][INFO]`；要看請定義 `WP_DEBUG_LOG` 或加上 `tmdo_log_info` filter。
+- 已知限制：cold 快取版本遞增的瞬間，在遞增前就開始的長請求寫入後只會清掉舊版 key，新版 key
+  最多保留舊值到 TTL（預設 1 小時）；cold module 預設 idle。
+
+---
+
+## [1.2.0] — 2026-09-27 — 漂移偵測、範圍收斂、CLI 與診斷（hardening 2.2）
+
+**性質**：功能 + 資料正確性修正。無 schema 變更。延續 ADR-004 的搜尋索引模式；搭配
+HivePress AddOn 0.3.0、WooCommerce AddOn 0.2.0。
+
+### Added
+
+- **`wp tmdo drift-check <entity> [--group] [--sample=<n>] [--format]`**（`TMDO_Drift_Check`）：
+  逐 key 比對扁平表與原生 meta 的值（第一筆原生 row → 安全 unserialize →
+  `Type_Caster::to_db`），回報 miss / diff / extra。序列化 vs JSON、`50` vs `50.000000`
+  不算漂移；超過 255 字元存 NULL 的 text 不算 miss。結果寫入 `wpdo_drift_status`。（PR-070）
+- **`drift-check --fix`**：刪除已刪實體與非本 group post type 的扁平列，其餘漂移列經
+  `TMDO_Entity_Migration_Engine::migrate_entity()` 從原生重建，清除列快取後再檢查一次。
+  不寫原生；aeav_only（扁平才是真實資料）一律拒絕。（PR-071、PR-073b）
+- **每日抽樣**：`wpdo_daily_health_check` 對 dual_write 以上、非 aeav_only 的 entity 每個
+  group 抽 500 筆，結果取代既有紀錄。（PR-073）
+- **Hook Bus 關閉期間的寫入補回**：entity 從 disabled 進入 dual_write / shadow_read，或
+  Hook Bus flag 由關轉開時，60 秒後以單次 WP-Cron `tmdo_drift_resync` 執行全量
+  `drift-check --fix`（不做 `post_modified_gmt` 增量：WooCommerce 直接 SQL 改庫存不會更新
+  post_modified）。停用 / 解除安裝時清除排程。（PR-074）
+- **`wp tmdo bridge-mode <entity> <mode>`**：經 `TMDO_Mode_Manager::set()`，受
+  Promotion Guard 約束；被拒時 exit 1、模式不變。（PR-069）
+- **`wp tmdo member-backfill --all`**：回填所有已註冊的 user group。（PR-068）
+- **`wp tmdo cleanup-hp-transients --options [--dry-run|--confirm] [--batch=<n>]`**：
+  刪除 HivePress AddOn 0.3.0 之前寫進 wp_options 的 `_transient_wpdo_hp_pm_*`（含 timeout），
+  分批刪除（預設 5000），AddOn 未啟用也可執行。dev36 有 2,314,750 列。（PR-080）
+
+### Changed
+
+- **Post query router 避開漂移中的 group**：上次 drift-check 有 miss / diff / extra 的
+  group 不路由，整個查詢維持原生（全有或全無）；從未檢查的 group 照常路由；aeav_only
+  不受影響。（PR-072、PR-073b）
+- **純排序搜尋 flat-first**：沒有路由篩選的 HivePress `_sort` 搜尋，在該 post type 每篇都有
+  扁平列時改由扁平表驅動（`STRAIGHT_JOIN` + INNER JOIN）；Router 在 `wp_insert_post`
+  替新文章建空列，覆蓋率以 anti-join 檢查並快取 15 分鐘（隨 post 模式變更失效）。
+  flat-first 且扁平表是唯一 JOIN 時拿掉 WordPress 為 tax query 加的 `GROUP BY posts.ID`。
+  dev36 `rating__desc`：原生約 3.3 s、1.1.0 約 1.5–1.9 s、現在約 0.51–0.85 s。（PR-079）
+- **Auto-promoter** 的第三個條件改為 `TMDO_Drift_Check::clean_since()`：2 天內每個 group 都
+  檢查過（抽樣或全量）且沒有漂移；沒有紀錄就不升級。（PR-075）
+- **shadow_read diff 節流**：每個 entity type + key 每小時最多記 20 列（疊加既有的
+  每物件 5 分鐘視窗）。（PR-075）
+- **回填 group 改讀 registry**：admin「全部回填」、`post-migrate-group`、`member-backfill`、
+  `member-audit` 取所有已註冊 group（排除已還原的孤兒 group），不再是寫死清單；含 json
+  欄位的 group（attachment、nav_menu_item）逐列經 migration engine。（PR-067、PR-068）
+- **不再註冊 `post/wc_product`**：WooCommerce 直接讀 product meta、以 SQL 寫庫存，扁平副本
+  必然漂移（ADR-004 決策 2）。既有的 `wp_wpdo_post_wc_product` 表保留，以
+  `wp tmdo bridge-restore-native post --group=wc_product --retire` 封存；解除安裝仍會刪除。（PR-077）
+- `member-sso-sync`、`member-force-logout` 標示為 deprecated（`sso` group 已不註冊）。（PR-069）
+
+### Fixed
+
+- Entity 回填替沒有原生 row 的 key 寫入 DDL 預設值（`session_count` / `account_flags` = 0），
+  每個 user 都被捏造出 0；現在寫 NULL，required NOT NULL 欄位保留預設值。（PR-066）
+- `member-cutover` 在轉換被拒時 fatal（把 `WP_Error` 當陣列）。（PR-068）
+- `doctor` 依 registry 檢查 entity 表（不再因從未註冊的 `sso` 表而每站失敗），並顯示
+  Promotion Guard 違規與 drift 狀態；`term-comment-diagnose` 依各 filter 的 `is_enabled()`
+  顯示狀態；`bridge-status` 只計有值的扁平列、eav_ids 限定 group 的 post type
+  （dev36 wp_core 15306% → 100%）。（PR-076）
+- 2.1 稽核：公開 REST route 註明公開理由；admin 23 處三元 echo 依情境 `esc_attr` /
+  `esc_html`；migration engine 與 health cron 的例外改記 `TMDO_Logger`。（PR-078）
+
+### Docs
+
+- ADR-004「設計（Release 2.2）」、`CONTEXT.md` Entity Bridge 的漂移段落。（PR-086）
+
+### 升級後
+
+- HivePress 站：部署 AddOn 0.3.0 後執行 `wp tmdo cleanup-hp-transients --options --confirm`。
+- 曾註冊 wc_product 的站：`wp tmdo bridge-restore-native post --group=wc_product --retire`。
+- 已進入 dual_write 以上的站：`wp tmdo drift-check <entity>` 建立第一筆紀錄（未檢查的
+  group 照常路由）。
+
+---
+
+## [1.1.1] — 2026-09-26 — Security：公開 REST 不再回傳私有欄位
+
+**性質**：安全修正（Critical）。1.0.x 起即存在；1.1.0 zip 已撤回（`dist/withdrawn/`）。
+
+### Security
+
+- **公開的 `GET /wpdo/v1/listings`、`/wpdo/v1/listings/{id}` 會把所有已註冊的 hot / cold
+  欄位回傳給未登入者**：`TMDO_Schema_Registry::register()` 的 `show_in_rest` 預設為 true，
+  而 addon 都沒有設定它。dev36 實測可取得 infocards 的 `tmeetic_ig_access_token_enc`、
+  `tmeetic_ig_token_expiry`、`tmeetic_ig_user_id`，以及 WooCommerce 的 `_purchase_note`。
+  - `show_in_rest` 預設改為 **false**：要公開的欄位必須明確宣告。
+  - 受保護的 meta key（底線開頭）與名稱像憑證的 key（token、secret、password、api key、
+    private key、credential、salt、nonce）即使宣告公開也一律不輸出
+    （`TMDO_Schema_Registry::rest_exposable()`）。
+  - Zone A 列表路徑在沒有任何公開欄位時不再回傳整列（fail-closed）；篩選參數與 orderby
+    只接受公開欄位，避免藉由篩選 / 排序推測隱藏值。
+- **相容性**：依賴預設公開的欄位，現在需在註冊時加上 `'show_in_rest' => true`，或使用
+  既有的 `tmdo_rest_listing_visible_fields` filter。
+- 測試：`RestApiTest` 新增 3 個；live suite `rest`（未登入 GET 不得出現私有 / 憑證類 key）。
+
+---
+
+## [1.1.0] — 2026-09-26 — HivePress / WooCommerce 搜尋索引模式（hardening 2.1）
+
+**性質**：資料正確性修正 + 查詢改寫補強。無 schema 變更。決策與設計見
+`docs/adr-004-search-index-mode-for-hp-wc.md`；搭配 HivePress AddOn 0.2.0。
+
+### Added
+
+- **Promotion Guard**（`TMDO_Promotion_Guard`）：HivePress 啟用時 post / user / term /
+  comment、WooCommerce 啟用時 post / user 不得升到 aeav_only 或執行 cleanup
+  （`WP_Error( 'promotion_guarded' )`，filter `tmdo_promotion_guard_allow`）；已在
+  aeav_only 的站只顯示後台 notice。（PR-053）
+- **`wp tmdo repair-array-literals [--entity] [--confirm]`**：把扁平表中的 `"Array"`
+  從原生修回；原生也被污染的列出清單。（PR-055）
+- **`bridge-restore-native --overwrite / --only-missing`**：預設依模式（aeav_only 覆寫、
+  其他只補缺）；報告新增 `missing` / `differs` / `same` / `default_skipped`。（PR-058）
+- **live 測試層** `tests/live/`（在真實站台以 `wp eval-file` 執行）：suites
+  `shadow_write`、`serialized`、`resync`、`router`、`zero_side_effect`，以及 qbench /
+  fe.sh 等量測工具。（PR-052）
+
+### Changed
+
+- **Hook Bus 寫入順序**：dual_write / shadow_read 由 WordPress 寫原生，扁平表在
+  `added_ / updated_ / deleted_{type}_meta` 從原生重新同步（含 `delete_all`、
+  `update_metadata_by_mid` 改 key）。（PR-057）
+- **shadow_read** 讀原生，並抽樣比對扁平值（`tmdo_shadow_compare_sample_rate`）。（PR-056）
+- **Post query router**：
+  - 全有或全無：OR、多 post type、含已註冊 key 的巢狀 group、type 語意與欄位不符的
+    clause 讓整個查詢維持原生；LIKE 包 `%esc_like%`；`pre_get_posts` priority 1000。（PR-060）
+  - 每個 group 各自 JOIN、不加 GROUP BY；NOT EXISTS 不走狀態 / 日期副本路由。（PR-061）
+  - meta orderby：HivePress `_sort`（NOT EXISTS + EXISTS）形狀、具名 clause、
+    `meta_key` + `meta_value_num`。（PR-062）
+  - routed 搜尋維持 WordPress 的 split query（ID-first）。（PR-062b）
+  - 依扁平欄位排序且有篩選的搜尋改由扁平表驅動（`STRAIGHT_JOIN`，posts.ID tie-break 改讀等值的
+    `post_id`），不再以 temporary table 排序；filter `tmdo_router_flat_first` 可關閉。（PR-062c）
+- `composer phpcs` 改用 `phpcs.xml`（與 CI 相同）。
+
+### Fixed
+
+- shadow_read 下 `update_*_meta()` 回傳 false、原生沒有寫入（資料遺失）。（PR-056）
+- 陣列 / 物件存進 text 欄位變成 `"Array"`；text 超過 255 字元改存 NULL 並記錄
+  `text_overflow`。（PR-055）
+- `bridge-restore-native` 覆蓋較新的原生值（WC 庫存）、替每個 user 捏造預設值列。（PR-058）
+- Cold / Hot 表不存在時，`save_post`、`loop_start`、刪除文章仍查詢它們（DB error）。（PR-054、PR-054b）
+- 刪除 post / user / term / comment 後，扁平表留下全 NULL 的孤兒列（PR-057 的 NULL 同步會重建已刪的列）。（PR-057b）
+- Router：Q05（wp_core 與另一 group 的 key 並用）`Unknown column`；OR / 多 post type /
+  無 type 數值比較 / 具名 orderby 的結果與原生不同。（PR-060〜062）
+
+### Docs
+
+- ADR-004、`CONTEXT.md` Entity Bridge（寫入順序、shadow_read、搜尋索引模式、Router 規則）、
+  `docs/BENCHMARK-SCALE.md` 前台與寫入鏈實測。（PR-064）
+
+---
+
 ## [1.0.2] — 2026-08-15 — NinjaFirewall 相容性：WAF 設定選項保護
 
 **性質**：防禦性修正 + 文件。無 schema 變更，無破壞性變更。

CONTEXT.md

@@ -135,6 +135,36 @@ Newer anti-EAV system (v2.5+) covering user, term, comment, and post entities vi
 The Entity Bridge and the Zone system coexist; the Sync Bridge's
 `is_owned_by_entity_bridge()` guard prevents duplicate writes.
 
+**Write order (v1.1.0).** In `dual_write` / `shadow_read` the Hook Bus pre-filters
+only decide the route and return `null`: WordPress writes native meta itself, and the
+flat value is then re-synced *from native* in `added_/updated_/deleted_{type}_meta`
+(priority 1) — `TMDO_Hook_Bus::sync_from_native()` reads the first native row with
+direct SQL; no native row → flat NULL. `aeav_only` keeps the pre-filter short-circuit.
+
+**shadow_read** reads native meta (WordPress meta cache) and compares a sample of reads
+with the flat value (`tmdo_shadow_compare_sample_rate`, default 0.1). Flat tables serve
+queries only: `TMDO_Post_Query_Router` is active from `shadow_read` up.
+
+**Search-index mode** (ADR-004). On HivePress / WooCommerce sites native meta is the
+source of truth and flat tables are its search index: `TMDO_Promotion_Guard` refuses
+`aeav_only` and cleanup there (post/user/term/comment with HivePress, post/user with
+WooCommerce), because both read meta with an empty key and WooCommerce updates stock
+and sales with direct SQL. Override: filter `tmdo_promotion_guard_allow`.
+
+**Post query router rules.** A query is rewritten only when the flat table returns
+what native `meta_query` would: every registered clause routable (else the whole query
+stays native), AND relation, one post type, column type matching the clause's CAST
+semantics, LIKE as `%esc_like%`. Meta ordering (the HivePress `_sort` NOT EXISTS/EXISTS
+shape, a named clause, `meta_key` + `meta_value_num`) is routed only as the sole
+`orderby` on a column that orders like native.
+
+**Drift** (v1.2.0). `TMDO_Drift_Check` compares flat values with native meta per key
+(miss / diff / extra) and records the outcome per group in `wpdo_drift_status`;
+`--fix` rebuilds flat rows from native. The router routes no clause of a group recorded
+as drifting (never checked → routes). A daily sample, and a full fix 60 s after an
+entity leaves `disabled` or the Hook Bus is switched back on (`tmdo_drift_resync`), keep
+the record current. None of this applies in `aeav_only`, where flat is the source of truth.
+
 ---
 
 ## Migration Phase (Strategy pattern)

admin/class-tmdo-admin.php

@@ -89,13 +89,16 @@ class TMDO_Admin {
 	 * Register the admin menu page under Tools.
 	 */
 	public static function register_menu(): void {
-		add_management_page(
+		$hook_suffix = add_management_page(
 			__( 'WP Data Optimizer', '2meet-data-optimizer' ),
 			__( 'WP Data Optimizer', '2meet-data-optimizer' ),
 			'manage_options',
 			self::MENU_SLUG,
 			array( __CLASS__, 'render_page' )
 		);
+		if ( $hook_suffix ) {
+			add_action( 'load-' . $hook_suffix, array( __CLASS__, 'handle_post' ) );
+		}
 	}
 
 	/**
@@ -326,9 +329,10 @@ class TMDO_Admin {
 	}
 
 	/**
-	 * Render the admin page.
+	 * Handle the page's form posts on load-{page}, before any output, so their
+	 * redirects work (inside render_page() the admin header was already sent).
 	 */
-	public static function render_page(): void {
+	public static function handle_post(): void {
 		if ( ! TMDO_Capability::current_user_can_admin() ) {
 			return;
 		}
@@ -556,11 +560,11 @@ class TMDO_Admin {
 			exit;
 		}
 
-		// v2.10.0: Post Migration Wizard — backfill all 7 groups.
+		// v2.10.0: Post Migration Wizard — backfill every registered post group.
 		if ( isset( $_POST['wpdo_post_backfill_all'] ) && check_admin_referer( 'wpdo_post_backfill_all' ) && class_exists( 'TMDO_Post_Migration' ) ) {
 			$total_migrated = 0;
 			$errors         = array();
-			foreach ( array( 'wp_core', 'attachment', 'wc_product', 'hp_listing_core', 'hp_request_core', 'hp_vendor_core', 'nav_menu_item' ) as $group ) {
+			foreach ( TMDO_Post_Migration::backfillable_groups() as $group ) {
 				try {
 					$result          = TMDO_Post_Migration::backfill_group( $group );
 					$total_migrated += (int) $result['migrated'];
@@ -752,6 +756,15 @@ class TMDO_Admin {
 			);
 			exit;
 		}
+	}
+
+	/**
+	 * Render the admin page.
+	 */
+	public static function render_page(): void {
+		if ( ! TMDO_Capability::current_user_can_admin() ) {
+			return;
+		}
 
 		$tabs = array(
 			'dashboard'             => __( '儀表板', '2meet-data-optimizer' ),
@@ -774,7 +787,7 @@ class TMDO_Admin {
 			'hivepress'             => __( 'HivePress 整合', '2meet-data-optimizer' ),
 		);
 
-		$tab = sanitize_key( wp_unslash( $_GET['tab'] ?? 'dashboard' ) );
+		$tab = sanitize_key( wp_unslash( $_GET['tab'] ?? 'dashboard' ) ); // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- tab navigation, no state change.
 		// v2.11.8: legacy tabs removed — redirect bookmarks to current main maintenance entry.
 		if ( in_array( $tab, array( 'sop', 'migration' ), true ) ) {
 			$tab = 'entity-bridge';
@@ -846,8 +859,8 @@ class TMDO_Admin {
 						<span class="wpdo-tab-group-label" aria-hidden="true"><?php echo esc_html( $group['label'] ); ?></span>
 						<?php foreach ( $group_tabs as $slug ) : ?>
 							<a href="<?php echo esc_url( add_query_arg( 'tab', $slug, admin_url( 'tools.php?page=' . self::MENU_SLUG ) ) ); ?>"
-								class="nav-tab <?php echo $tab === $slug ? 'nav-tab-active' : ''; ?>"
-								<?php echo $tab === $slug ? 'aria-current="page"' : ''; ?>>
+								class="nav-tab <?php echo esc_attr( $tab === $slug ? 'nav-tab-active' : '' ); ?>"
+								aria-current="<?php echo esc_attr( $tab === $slug ? 'page' : 'false' ); ?>">
 								<?php echo esc_html( $tabs[ $slug ] ); ?>
 								<?php if ( isset( $needs_dot[ $slug ] ) ) : ?>
 									<span class="wpdo-tab-dot" title="
@@ -1099,7 +1112,7 @@ class TMDO_Admin {
 					<tbody>
 						<tr>
 							<th><?php esc_html_e( '資料庫引擎', '2meet-data-optimizer' ); ?></th>
-							<td><code><?php echo TMDO_IS_MYSQL ? 'MySQL' : 'SQLite'; ?></code></td>
+							<td><code><?php echo esc_html( TMDO_IS_MYSQL ? 'MySQL' : 'SQLite' ); ?></code></td>
 						</tr>
 						<tr>
 							<th><?php esc_html_e( '外掛版本', '2meet-data-optimizer' ); ?></th>
@@ -1116,7 +1129,11 @@ class TMDO_Admin {
 						<tr>
 							<th><?php esc_html_e( 'Object Cache', '2meet-data-optimizer' ); ?></th>
 							<td>
-								<?php echo wp_using_ext_object_cache() ? '<span class="wpdo-badge wpdo-badge-ok">External</span>' : '<span class="wpdo-badge">Built-in</span>'; ?>
+								<?php if ( wp_using_ext_object_cache() ) : ?>
+									<span class="wpdo-badge wpdo-badge-ok">External</span>
+								<?php else : ?>
+									<span class="wpdo-badge">Built-in</span>
+								<?php endif; ?>
 								<?php if ( $cache['flush_support'] ) : ?>
 									<span class="wpdo-badge wpdo-badge-ok">Flush Support</span>
 								<?php endif; ?>
@@ -1726,13 +1743,13 @@ class TMDO_Admin {
 						↑ <?php esc_html_e( '升級模式', '2meet-data-optimizer' ); ?>
 					</button>
 					<button type="button"
-						class="button wpdo-btn-demote <?php echo $prev_mode ? '' : 'wpdo-eb-btn-dim'; ?>"
+						class="button wpdo-btn-demote <?php echo esc_attr( $prev_mode ? '' : 'wpdo-eb-btn-dim' ); ?>"
 						data-wpdo-action="demote"
 						data-entity-type="<?php echo esc_attr( $etype ); ?>"
 						data-prev-mode="<?php echo esc_attr( $prev_mode ?? '' ); ?>"
 						<?php disabled( ! $prev_mode ); ?>
 						title="<?php echo esc_attr( $prev_mode ? '降級到 ' . $prev_mode : '已在最低模式' ); ?>"
-						class="<?php echo $prev_mode ? '' : 'wpdo-eb-btn-dim'; ?>">
+						class="<?php echo esc_attr( $prev_mode ? '' : 'wpdo-eb-btn-dim' ); ?>">
 						↓ <?php esc_html_e( '降級模式', '2meet-data-optimizer' ); ?>
 					</button>
 				</div>
@@ -2037,7 +2054,7 @@ class TMDO_Admin {
 			</div>
 
 			<!-- Progress section (live) -->
-			<div id="wpdo-st-progress-card" class="wpdo-eb-card wpdo-mt-3<?php echo $is_running ? '' : ' wpdo-hidden'; ?>">
+			<div id="wpdo-st-progress-card" class="wpdo-eb-card wpdo-mt-3<?php echo esc_attr( $is_running ? '' : ' wpdo-hidden' ); ?>">
 				<h3 class="wpdo-mt-0"><?php esc_html_e( '2. 即時進度', '2meet-data-optimizer' ); ?></h3>
 				<div class="wpdo-bar-section">
 					<div class="wpdo-bar-header">
@@ -2071,7 +2088,7 @@ class TMDO_Admin {
 			</div>
 
 			<!-- Benchmark report -->
-			<div id="wpdo-st-bench-card" class="wpdo-eb-card wpdo-mt-3<?php echo ! empty( $state['benchmark'] ) ? '' : ' wpdo-hidden'; ?>">
+			<div id="wpdo-st-bench-card" class="wpdo-eb-card wpdo-mt-3<?php echo esc_attr( ! empty( $state['benchmark'] ) ? '' : ' wpdo-hidden' ); ?>">
 				<h3 class="wpdo-mt-0"><?php esc_html_e( '3. Benchmark 報告', '2meet-data-optimizer' ); ?></h3>
 				<div id="wpdo-st-bench-content">
 					<?php if ( ! empty( $state['benchmark'] ) ) : ?>

admin/class-tmdo-dashboard-widget.php

@@ -246,7 +246,7 @@ class TMDO_Dashboard_Widget {
 					'%2$s'
 				);
 			?>
-			<p class="wpdo-widget-notice <?php echo $total_eav > 0 ? 'wpdo-widget-notice-warn' : 'wpdo-widget-notice-ok'; ?>">
+			<p class="wpdo-widget-notice <?php echo esc_attr( $total_eav > 0 ? 'wpdo-widget-notice-warn' : 'wpdo-widget-notice-ok' ); ?>">
 				📦
 				<?php
 				if ( $total_eav > 0 ) {

admin/class-tmdo-promotion-guard-notice.php

@@ -0,0 +1,63 @@
+<?php
+/**
+ * Admin notice when an entity is in aeav_only on a HivePress / WooCommerce site.
+ *
+ * Those plugins read native meta directly, so on an aeav_only entity they read
+ * stale (or, after cleanup, missing) values. The Promotion Guard refuses new
+ * promotions; sites promoted before it existed are only warned — demoting on
+ * read would leave them reading whatever native meta is left.
+ *
+ * @package WP_Data_Optimizer
+ */
+
+declare(strict_types=1);
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+/**
+ * Warns administrators about guarded entities that are already in aeav_only.
+ */
+final class TMDO_Promotion_Guard_Notice {
+
+	/**
+	 * Hook the notice.
+	 *
+	 * @return void
+	 */
+	public static function register(): void {
+		add_action( 'admin_notices', array( __CLASS__, 'render' ) );
+	}
+
+	/**
+	 * Print the notice for administrators when a guarded entity is in aeav_only.
+	 *
+	 * @return void
+	 */
+	public static function render(): void {
+		if ( ! current_user_can( 'manage_options' ) ) {
+			return;
+		}
+		$violations = TMDO_Promotion_Guard::violations();
+		if ( empty( $violations ) ) {
+			return;
+		}
+
+		$lines = array();
+		foreach ( $violations as $entity_type => $integrations ) {
+			$lines[] = sprintf( '%s（%s）：wp tmdo bridge-restore-native %s --demote', $entity_type, implode( ' / ', $integrations ), $entity_type );
+		}
+		printf(
+			'<div class="notice notice-error"><p><strong>%s</strong> %s</p></div>',
+			esc_html__( '2meet Data Optimizer：', '2meet-data-optimizer' ),
+			esc_html(
+				sprintf(
+					/* translators: %s: "entity (integrations): command" list */
+					__( '以下實體處於 aeav_only，但這些外掛會直接讀取原生 meta，可能讀到過期或遺失的資料。請先備份，再把扁平資料寫回原生並降級：%s', '2meet-data-optimizer' ),
+					implode( '；', $lines )
+				)
+			)
+		);
+	}
+}

admin/class-tmdo-setup-wizard.php

@@ -106,7 +106,7 @@ class TMDO_Setup_Wizard {
 	 * @return void
 	 */
 	public static function register_menu_page(): void {
-		add_submenu_page(
+		$hook_suffix = add_submenu_page(
 			'tools.php',
 			__( 'WPDO 設定嚮導', '2meet-data-optimizer' ),
 			__( 'WPDO 設定嚮導', '2meet-data-optimizer' ),
@@ -114,6 +114,33 @@ class TMDO_Setup_Wizard {
 			'wpdo-setup-wizard',
 			array( __CLASS__, 'render_page' )
 		);
+		if ( $hook_suffix ) {
+			add_action( 'load-' . $hook_suffix, array( __CLASS__, 'handle_snapshot_post' ) );
+		}
+	}
+
+	/**
+	 * Step 4 baseline snapshot (POST + nonce, prevents Referer leak — v3.3.x
+	 * P1-6b hardening), handled on load-{page} so the redirect runs before any
+	 * output.
+	 *
+	 * @return void
+	 */
+	public static function handle_snapshot_post(): void {
+		if ( ! isset( $_POST['wpdo_take_snapshot'] ) || ! TMDO_Capability::current_user_can_admin() || ! class_exists( 'TMDO_Snapshot_Manager' ) ) {
+			return;
+		}
+		check_admin_referer( self::NONCE_NAME );
+		$result = TMDO_Snapshot_Manager::create(
+			'manual',
+			array(),
+			array(
+				'notes'          => 'wizard_baseline',
+				'retention_days' => 365,
+			)
+		);
+		wp_safe_redirect( admin_url( 'tools.php?page=wpdo-setup-wizard&step=4&' . ( empty( $result['ok'] ) ? 'snap_failed=1' : 'snap_done=1' ) ) );
+		exit;
 	}
 
 	/**
@@ -356,20 +383,8 @@ class TMDO_Setup_Wizard {
 				</p>
 			</form>
 			<?php
-			// Take snapshot if action requested (POST + nonce, prevents Referer leak — v3.3.x P1-6b hardening).
-			if ( isset( $_POST['wpdo_take_snapshot'] ) && check_admin_referer( self::NONCE_NAME ) && class_exists( 'TMDO_Snapshot_Manager' ) ) {
-				$result = TMDO_Snapshot_Manager::create(
-					'manual',
-					array(),
-					array(
-						'notes'          => 'wizard_baseline',
-						'retention_days' => 365,
-					)
-				);
-				if ( ! empty( $result['ok'] ) ) {
-					wp_safe_redirect( admin_url( 'tools.php?page=wpdo-setup-wizard&step=4&snap_done=1' ) );
-					exit;
-				}
+			// The snapshot itself is taken in handle_snapshot_post(), before any output.
+			if ( isset( $_GET['snap_failed'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
 				echo '<div class="notice notice-error"><p>' . esc_html__( 'Snapshot 建立失敗，請查日誌。', '2meet-data-optimizer' ) . '</p></div>';
 			}
 			?>

admin/templates/comment-stress-test.php

@@ -211,7 +211,7 @@ $total_commentmeta = (int) $wpdb->get_var( "SELECT COUNT(*) FROM {$wpdb->comment
 	</div>
 
 	<!-- Progress card (live) -->
-	<div id="wpdo-cst-progress-card" class="wpdo-card wpdo-mt-3<?php echo $is_running ? '' : ' wpdo-hidden'; ?>">
+	<div id="wpdo-cst-progress-card" class="wpdo-card wpdo-mt-3<?php echo esc_attr( $is_running ? '' : ' wpdo-hidden' ); ?>">
 		<h3 class="wpdo-mt-0"><?php esc_html_e( '2. 即時進度', '2meet-data-optimizer' ); ?></h3>
 		<div class="wpdo-bar-section">
 			<div class="wpdo-bar-header">
@@ -249,7 +249,7 @@ $total_commentmeta = (int) $wpdb->get_var( "SELECT COUNT(*) FROM {$wpdb->comment
 	</div>
 
 	<!-- Benchmark report -->
-	<div id="wpdo-cst-bench-card" class="wpdo-card wpdo-mt-3<?php echo ! empty( $state['benchmark'] ) ? '' : ' wpdo-hidden'; ?>">
+	<div id="wpdo-cst-bench-card" class="wpdo-card wpdo-mt-3<?php echo esc_attr( ! empty( $state['benchmark'] ) ? '' : ' wpdo-hidden' ); ?>">
 		<h3 class="wpdo-mt-0"><?php esc_html_e( '3. Benchmark 報告', '2meet-data-optimizer' ); ?></h3>
 		<div id="wpdo-cst-bench-content"></div>
 	</div>

admin/templates/migration-wizard.php

@@ -99,7 +99,7 @@ $failed         = 'failed' === $state;
 
 	<!-- Run-migration panel (idle state) ──────────────────────────────── -->
 	<section class="wpdo-mw-panel wpdo-mw-run" id="wpdo-mw-run-panel"
-		<?php echo $active || $completed ? 'hidden' : ''; ?>>
+		<?php echo esc_attr( $active || $completed ? 'hidden' : '' ); ?>>
 
 		<?php if ( 0 === $eav_residue && 'aeav_only' === $current_mode ) : ?>
 			<div class="wpdo-mw-nothing-todo">
@@ -170,7 +170,7 @@ $failed         = 'failed' === $state;
 
 	<!-- Live progress panel (running state) ───────────────────────────── -->
 	<section class="wpdo-mw-panel wpdo-mw-progress" id="wpdo-mw-progress-panel"
-		<?php echo $active || $failed ? '' : 'hidden'; ?>>
+		<?php echo esc_attr( $active || $failed ? '' : 'hidden' ); ?>>
 
 		<h3 id="wpdo-mw-progress-title"><?php esc_html_e( '執行中…', '2meet-data-optimizer' ); ?></h3>
 
@@ -210,7 +210,7 @@ $failed         = 'failed' === $state;
 
 	<!-- Completed state ───────────────────────────────────────────────── -->
 	<section class="wpdo-mw-panel wpdo-mw-done" id="wpdo-mw-done-panel"
-		<?php echo $completed ? '' : 'hidden'; ?>>
+		<?php echo esc_attr( $completed ? '' : 'hidden' ); ?>>
 		<h3>✅ <?php esc_html_e( '遷移完成', '2meet-data-optimizer' ); ?></h3>
 		<div class="wpdo-mw-done-summary" id="wpdo-mw-done-summary"></div>
 		<button type="button" class="button" id="wpdo-mw-reset"><?php esc_html_e( '回到診斷頁', '2meet-data-optimizer' ); ?></button>

admin/templates/post-migration-wizard.php

@@ -218,7 +218,7 @@ $wpdo_format_msg = static function ( string $code ): string {
 		<form method="post">
 			<input type="hidden" name="wpdo_postmeta_cleanup" value="1">
 			<?php wp_nonce_field( 'wpdo_postmeta_cleanup' ); ?>
-			<button type="submit" class="button button-primary <?php echo (int) $garbage['total'] > 0 ? '' : 'disabled'; ?>"
+			<button type="submit" class="button button-primary <?php echo esc_attr( (int) $garbage['total'] > 0 ? '' : 'disabled' ); ?>"
 				onclick="return confirm(<?php echo wp_json_encode( __( '確定要刪除 wp_postmeta 中的垃圾資料？此動作不可逆。', '2meet-data-optimizer' ) ); ?>);">
 				<?php esc_html_e( '清理垃圾資料', '2meet-data-optimizer' ); ?>
 			</button>

admin/templates/post-stress-test.php

@@ -161,22 +161,22 @@ $post_type_options = array(
 					</tr>
 				</thead>
 				<tbody>
-					<tr class="<?php echo 'disabled' === $current_post_mode ? 'wpdo-tr-highlight' : ''; ?>">
+					<tr class="<?php echo esc_attr( 'disabled' === $current_post_mode ? 'wpdo-tr-highlight' : '' ); ?>">
 						<td><code>disabled</code></td>
 						<td>wp_postmeta 5 rows / flat 0 → <strong>1:5（無優化）</strong></td>
 						<td>wp_postmeta 5 / flat 0 → 1:5（無優化）</td>
 					</tr>
-					<tr class="<?php echo 'dual_write' === $current_post_mode ? 'wpdo-tr-highlight' : ''; ?>">
+					<tr class="<?php echo esc_attr( 'dual_write' === $current_post_mode ? 'wpdo-tr-highlight' : '' ); ?>">
 						<td><code>dual_write</code></td>
 						<td>wp_postmeta 5 / flat 0 → 1:5</td>
 						<td>wp_postmeta 5 + flat 1 → 1:5（有 flat 但 wp_postmeta 不減）</td>
 					</tr>
-					<tr class="<?php echo 'shadow_read' === $current_post_mode ? 'wpdo-tr-highlight' : ''; ?>">
+					<tr class="<?php echo esc_attr( 'shadow_read' === $current_post_mode ? 'wpdo-tr-highlight' : '' ); ?>">
 						<td><code>shadow_read</code></td>
 						<td>wp_postmeta 5 / flat 0 → 1:5</td>
 						<td>wp_postmeta 5 + flat 1 → 1:5（讀走 flat，寫仍雙寫）</td>
 					</tr>
-					<tr class="<?php echo 'aeav_only' === $current_post_mode ? 'wpdo-tr-success' : ''; ?>">
+					<tr class="<?php echo esc_attr( 'aeav_only' === $current_post_mode ? 'wpdo-tr-success' : '' ); ?>">
 						<td><code>aeav_only</code></td>
 						<td>wp_postmeta 5（直 SQL 繞過 Hook Bus）/ flat 0 → 1:5 ⚠️</td>
 						<td>wp_postmeta <strong>0</strong> / flat 1 → <strong>0:1（完全優化）</strong> ✅</td>
@@ -291,7 +291,7 @@ $post_type_options = array(
 	</div>
 
 	<!-- Progress section (live) -->
-	<div id="wpdo-pst-progress-card" class="wpdo-card wpdo-mt-3<?php echo $is_running ? '' : ' wpdo-hidden'; ?>">
+	<div id="wpdo-pst-progress-card" class="wpdo-card wpdo-mt-3<?php echo esc_attr( $is_running ? '' : ' wpdo-hidden' ); ?>">
 		<h3 class="wpdo-mt-0"><?php esc_html_e( '2. 即時進度', '2meet-data-optimizer' ); ?></h3>
 		<div class="wpdo-bar-section">
 			<div class="wpdo-bar-header">
@@ -329,7 +329,7 @@ $post_type_options = array(
 	</div>
 
 	<!-- Benchmark report -->
-	<div id="wpdo-pst-bench-card" class="wpdo-card wpdo-mt-3<?php echo ! empty( $state['benchmark'] ) ? '' : ' wpdo-hidden'; ?>">
+	<div id="wpdo-pst-bench-card" class="wpdo-card wpdo-mt-3<?php echo esc_attr( ! empty( $state['benchmark'] ) ? '' : ' wpdo-hidden' ); ?>">
 		<h3 class="wpdo-mt-0"><?php esc_html_e( '3. Benchmark 報告', '2meet-data-optimizer' ); ?></h3>
 		<div id="wpdo-pst-bench-content"></div>
 	</div>

admin/templates/term-stress-test.php

@@ -207,7 +207,7 @@ $total_termmeta   = (int) $wpdb->get_var( "SELECT COUNT(*) FROM {$wpdb->termmeta
 	</div>
 
 	<!-- Progress card (live) -->
-	<div id="wpdo-tst-progress-card" class="wpdo-card wpdo-mt-3<?php echo $is_running ? '' : ' wpdo-hidden'; ?>">
+	<div id="wpdo-tst-progress-card" class="wpdo-card wpdo-mt-3<?php echo esc_attr( $is_running ? '' : ' wpdo-hidden' ); ?>">
 		<h3 class="wpdo-mt-0"><?php esc_html_e( '2. 即時進度', '2meet-data-optimizer' ); ?></h3>
 		<div class="wpdo-bar-section">
 			<div class="wpdo-bar-header">
@@ -245,7 +245,7 @@ $total_termmeta   = (int) $wpdb->get_var( "SELECT COUNT(*) FROM {$wpdb->termmeta
 	</div>
 
 	<!-- Benchmark report -->
-	<div id="wpdo-tst-bench-card" class="wpdo-card wpdo-mt-3<?php echo ! empty( $state['benchmark'] ) ? '' : ' wpdo-hidden'; ?>">
+	<div id="wpdo-tst-bench-card" class="wpdo-card wpdo-mt-3<?php echo esc_attr( ! empty( $state['benchmark'] ) ? '' : ' wpdo-hidden' ); ?>">
 		<h3 class="wpdo-mt-0"><?php esc_html_e( '3. Benchmark 報告', '2meet-data-optimizer' ); ?></h3>
 		<div id="wpdo-tst-bench-content"></div>
 	</div>

cli/class-tmdo-cli-member.php

@@ -9,8 +9,8 @@
  *   wp wpdo member-shadow-report       — Recent entity_type=user diff records.
  *   wp wpdo member-cutover             — Switch user mode to aeav_only.
  *   wp wpdo member-points-check        — Show balance + recent ledger for a user.
- *   wp wpdo member-sso-sync            — Sync Hub membership claims to flat table.
- *   wp wpdo member-force-logout        — Set token_expires_at to past → re-auth.
+ *   wp wpdo member-sso-sync            — (deprecated) Sync Hub membership claims to flat table.
+ *   wp wpdo member-force-logout        — (deprecated) Set token_expires_at to past → re-auth.
  *
  * @package WP_Data_Optimizer
  * @since   2.5.5
@@ -35,24 +35,6 @@ if ( ! class_exists( 'WP_CLI' ) ) {
  */
 class TMDO_CLI_Member {
 
-	/**
-	 * Valid group names managed by this CLI.
-	 *
-	 * V2.7.0: Extended with core_profile/social/commerce/hp_user to absorb
-	 * the legacy WP/WC/HP wp_usermeta keys.
-	 */
-	private const VALID_GROUPS = array(
-		'membership',
-		'activity',
-		'profile',
-		'sso',
-		'core_profile',
-		'social',
-		'commerce',
-		'hp_user',
-		'admin_prefs',
-	);
-
 	// ── member-audit ─────────────────────────────────────────────────────────
 
 	/**
@@ -73,7 +55,7 @@ class TMDO_CLI_Member {
 		WP_CLI::log( '' );
 
 		$items = array();
-		foreach ( self::VALID_GROUPS as $group ) {
+		foreach ( TMDO_Entity_Registry::get_groups_for_type( 'user' ) as $group ) {
 			$table  = $wpdb->prefix . 'wpdo_user_' . $group;
 			$exists = (bool) $wpdb->get_var( // phpcs:ignore WordPress.DB.DirectDatabaseQuery,WordPress.DB.DirectDatabaseQuery.NoCaching
 				$wpdb->prepare( 'SHOW TABLES LIKE %s', $table )
@@ -111,7 +93,7 @@ class TMDO_CLI_Member {
 	// ── member-backfill ───────────────────────────────────────────────────────
 
 	/**
-	 * Backfill wp_usermeta rows into the specified user flat-table group.
+	 * Backfill wp_usermeta rows into one user flat-table group, or all of them.
 	 *
 	 * Uses TMDO_Entity_Migration_Engine::migrate_group() — cursor-based,
 	 * 500 rows/batch, checkpoint stored in wpdo_migration_status.
@@ -119,7 +101,10 @@ class TMDO_CLI_Member {
 	 * ## OPTIONS
 	 *
 	 * [--group=<group>]
-	 * : Which group to backfill: membership, activity, profile, sso. Default: membership.
+	 * : Registered user group to backfill (e.g. membership, activity, core_profile). Default: membership.
+	 *
+	 * [--all]
+	 * : Backfill every registered user group (restored orphan groups excluded).
 	 *
 	 * [--batch-size=<n>]
 	 * : Rows per batch (default 500, max 2000).
@@ -134,21 +119,38 @@ class TMDO_CLI_Member {
 	 *
 	 *     wp wpdo member-backfill --group=membership --dry-run
 	 *     wp wpdo member-backfill --group=membership
-	 *     wp wpdo member-backfill --group=sso --reset
+	 *     wp wpdo member-backfill --all
 	 *
 	 * @param array $args       Positional arguments.
 	 * @param array $assoc_args Named arguments.
 	 */
 	public function member_backfill( $args, $assoc_args ): void {
-		$group      = (string) ( $assoc_args['group'] ?? 'membership' );
 		$batch_size = min( 2000, max( 1, (int) ( $assoc_args['batch-size'] ?? 500 ) ) );
 		$dry_run    = isset( $assoc_args['dry-run'] );
 		$reset      = isset( $assoc_args['reset'] );
+		$valid      = TMDO_Entity_Migration_Engine::backfillable_groups( 'user' );
 
-		if ( ! in_array( $group, self::VALID_GROUPS, true ) ) {
-			WP_CLI::error( 'Invalid --group. Choose: ' . implode( ', ', self::VALID_GROUPS ) );
+		if ( isset( $assoc_args['all'] ) ) {
+			if ( isset( $assoc_args['group'] ) ) {
+				WP_CLI::error( 'Use either --group or --all, not both.' );
+			}
+			$groups = $valid;
+		} else {
+			$groups = array( (string) ( $assoc_args['group'] ?? 'membership' ) );
+			if ( ! in_array( $groups[0], $valid, true ) ) {
+				WP_CLI::error( 'Invalid --group. Choose: ' . implode( ', ', $valid ) );
+			}
 		}
 
+		foreach ( $groups as $group ) {
+			$this->backfill_group( $group, $batch_size, $dry_run, $reset );
+		}
+	}
+
+	/**
+	 * Backfill one user group and report the result.
+	 */
+	private function backfill_group( string $group, int $batch_size, bool $dry_run, bool $reset ): void {
 		if ( $reset ) {
 			TMDO_Entity_Migration_Engine::reset_checkpoint( 'user', $group );
 			WP_CLI::log( "Checkpoint cleared for user/{$group}." );
@@ -298,8 +300,8 @@ class TMDO_CLI_Member {
 
 		$result = TMDO_Mode_Manager::set( 'user', 'aeav_only' );
 
-		if ( isset( $result['error'] ) ) {
-			WP_CLI::error( 'Cutover failed: ' . $result['error'] );
+		if ( is_wp_error( $result ) ) {
+			WP_CLI::error( 'Cutover failed: ' . $result->get_error_message() );
 		}
 
 		WP_CLI::success( 'User bridge mode set to aeav_only. All user meta reads/writes now go through flat tables.' );
@@ -356,6 +358,9 @@ class TMDO_CLI_Member {
 	/**
 	 * Sync Hub membership claims into the user flat table.
 	 *
+	 * Deprecated since 1.2.0: the user `sso` group is no longer registered, so
+	 * its flat table is never created on new installs. Will be removed.
+	 *
 	 * Reads _tmso_refresh_token / _tmso_picture_url / _tmso_last_id_token
 	 * from usermeta and writes them into the sso group flat table.
 	 * Intended as a one-shot sync until 2meet-spoke-sso v1.14+ starts writing
@@ -381,6 +386,7 @@ class TMDO_CLI_Member {
 	 * @param array $assoc_args Named arguments.
 	 */
 	public function member_sso_sync( $args, $assoc_args ): void {
+		WP_CLI::warning( 'member-sso-sync is deprecated since 1.2.0 (the user sso group is no longer registered) and will be removed.' );
 		global $wpdb;
 
 		$user_id = isset( $assoc_args['user-id'] ) ? (int) $assoc_args['user-id'] : 0;
@@ -466,6 +472,9 @@ class TMDO_CLI_Member {
 	/**
 	 * Force re-authentication by setting token_expires_at to a past datetime.
 	 *
+	 * Deprecated since 1.2.0: works on the user `sso` flat table, which is no
+	 * longer registered. Will be removed.
+	 *
 	 * The Spoke silent-refresh logic detects an expired token_expires_at and
 	 * redirects the user to re-authenticate against the Hub. If the Hub has
 	 * the account blocked, the user is logged out from all Spokes.
@@ -490,6 +499,7 @@ class TMDO_CLI_Member {
 	 * @param array $assoc_args Named arguments.
 	 */
 	public function member_force_logout( $args, $assoc_args ): void {
+		WP_CLI::warning( 'member-force-logout is deprecated since 1.2.0 (the user sso group is no longer registered) and will be removed.' );
 		if ( ! isset( $assoc_args['confirm'] ) ) {
 			WP_CLI::error( 'This invalidates live SSO tokens. Add --confirm to proceed.' );
 		}

cli/class-tmdo-cli-post.php

@@ -198,29 +198,20 @@ class TMDO_CLI_Post {
 
 	/**
 	 * Backfill one post entity group from wp_postmeta into its flat table
-	 * via a single bulk SQL pivot (ON DUPLICATE KEY UPDATE).
+	 * via a single bulk SQL pivot (ON DUPLICATE KEY UPDATE). Groups with
+	 * JSON-typed fields are backfilled row by row instead.
 	 *
-	 * Idempotent — safe to re-run. Skips JSON-typed fields (handled by the
-	 * row-by-row backfill phase in v2.9.4+).
+	 * Idempotent — safe to re-run.
 	 *
 	 * ## OPTIONS
 	 *
 	 * --group=<group>
-	 * : Entity group name. Required.
-	 * ---
-	 * options:
-	 *   - wp_core
-	 *   - attachment
-	 *   - wc_product
-	 *   - hp_listing_core
-	 *   - hp_request_core
-	 *   - hp_vendor_core
-	 *   - nav_menu_item
-	 * ---
+	 * : Registered post entity group name (e.g. wp_core, attachment,
+	 * hp_listing_core). Required.
 	 *
 	 * ## EXAMPLES
 	 *
-	 *     wp wpdo post-migrate-group --group=wc_product
+	 *     wp wpdo post-migrate-group --group=hp_listing_core
 	 *     wp wpdo post-migrate-group --group=hp_listing_core
 	 *
 	 * @param array $args       Positional arguments (unused).
@@ -439,6 +430,10 @@ class TMDO_CLI_Post {
 	 * Safe to run with the filter enabled; the filter prevents new postmeta
 	 * writes from re-bloating the table.
 	 *
+	 * With --options it removes instead the rows the filter wrote to wp_options
+	 * (`_transient_wpdo_hp_pm_*`) before 1.2.0 / AddOn 0.3.0 kept them in the
+	 * object cache; works without the AddOn active.
+	 *
 	 * ## OPTIONS
 	 *
 	 * [--dry-run]
@@ -447,10 +442,17 @@ class TMDO_CLI_Post {
 	 * [--confirm]
 	 * : Required to actually DELETE rows.
 	 *
+	 * [--options]
+	 * : Clean the AddOn's rows in wp_options instead of wp_postmeta.
+	 *
+	 * [--batch=<n>]
+	 * : Rows per DELETE with --options. Default 5000.
+	 *
 	 * ## EXAMPLES
 	 *
 	 *     wp wpdo cleanup-hp-transients --dry-run
 	 *     wp wpdo cleanup-hp-transients --confirm
+	 *     wp wpdo cleanup-hp-transients --options --dry-run
 	 *
 	 * @param array $args       Positional arguments (unused).
 	 * @param array $assoc_args Named arguments.
@@ -470,6 +472,11 @@ class TMDO_CLI_Post {
 			);
 		}
 
+		if ( isset( $assoc_args['options'] ) ) {
+			self::cleanup_hp_transient_options( $dry_run, max( 1, (int) ( $assoc_args['batch'] ?? 5000 ) ) );
+			return;
+		}
+
 		if ( ! class_exists( 'TMDO_Hivepress_Transient_Filter' ) ) {
 			WP_CLI::error( 'TMDO_Hivepress_Transient_Filter not loaded.' );
 		}
@@ -503,6 +510,39 @@ class TMDO_CLI_Post {
 		);
 	}
 
+	/**
+	 * Count or delete the HivePress AddOn's transient rows in wp_options, in
+	 * batches (dev36 held 1.15 M of them).
+	 *
+	 * @param bool $dry_run Count only.
+	 * @param int  $batch   Rows per DELETE.
+	 * @return void
+	 */
+	private static function cleanup_hp_transient_options( bool $dry_run, int $batch ): void {
+		global $wpdb;
+		// TMDO_Hivepress_Transient_Filter::TRANSLATED_NAMESPACE (AddOn), repeated
+		// here so the leftovers can be removed with the AddOn gone.
+		$ns    = $wpdb->esc_like( 'wpdo_hp_pm_' );
+		$where = $wpdb->prepare( 'option_name LIKE %s OR option_name LIKE %s', '\_transient\_' . $ns . '%', '\_transient\_timeout\_' . $ns . '%' );
+
+		if ( $dry_run ) {
+			$count = (int) $wpdb->get_var( "SELECT COUNT(*) FROM {$wpdb->options} WHERE {$where}" ); // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching,WordPress.DB.PreparedSQL.InterpolatedNotPrepared
+			WP_CLI::success( sprintf( '[dry-run] %d HivePress transient row(s) in wp_options would be deleted. Re-run with --confirm.', $count ) );
+			return;
+		}
+
+		$deleted = 0;
+		do {
+			$rows     = (int) $wpdb->query( "DELETE FROM {$wpdb->options} WHERE {$where} LIMIT {$batch}" ); // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching,WordPress.DB.PreparedSQL.InterpolatedNotPrepared
+			$deleted += $rows;
+		} while ( $rows === $batch );
+
+		if ( class_exists( 'TMDO_Logger' ) ) {
+			TMDO_Logger::info( 'cleanup_hp_transient_options', array( 'deleted' => $deleted ) );
+		}
+		WP_CLI::success( sprintf( 'Deleted %d HivePress transient row(s) from wp_options.', $deleted ) );
+	}
+
 	// ── post-cutover-legacy (v2.9.5) ──────────────────────────────────────────
 
 	/**

cli/class-tmdo-cli-term-comment.php

@@ -442,9 +442,9 @@ class TMDO_CLI_Term_Comment {
 
 		WP_CLI::log( '' );
 		WP_CLI::log( '── Filter chain status ──' );
-		self::print_filter_status( 'wpdo_term_comment_garbage_filter_enabled', 'Garbage filter (Phase 1)' );
-		self::print_filter_status( 'wpdo_wc_term_count_filter_enabled', 'WC term count filter (Phase 3)' );
-		self::print_filter_status( 'wpdo_term_comment_misc_bucket_enabled', 'Misc bucket (Phase 4)' );
+		self::print_filter_status( 'TMDO_Term_Comment_Garbage_Filter', 'Garbage filter (Phase 1)' );
+		self::print_filter_status( 'TMDO_WC_Term_Count_Filter', 'WC term count filter (Phase 3)' );
+		self::print_filter_status( 'TMDO_Term_Comment_Misc_Bucket', 'Misc bucket (Phase 4)' );
 
 		WP_CLI::log( '' );
 		WP_CLI::log( 'Recommendation: ' . self::recommend_next_action( $term_mode, $comment_mode ) );
@@ -504,15 +504,19 @@ class TMDO_CLI_Term_Comment {
 	}
 
 	/**
-	 * Print a filter's enabled/disabled status.
+	 * Print a filter's enabled/disabled status, as the filter itself decides it
+	 * (each has its own default).
 	 *
-	 * @param string $option_key Option storing the toggle value.
-	 * @param string $label      Human-readable name.
+	 * @param string $filter_class Filter class with a static is_enabled().
+	 * @param string $label        Human-readable name.
 	 * @return void
 	 */
-	private static function print_filter_status( string $option_key, string $label ): void {
-		$enabled = (bool) get_option( $option_key, '1' );
-		WP_CLI::log( sprintf( '%-32s%s', $label . ':', $enabled ? '✓ enabled' : '✗ disabled' ) );
+	private static function print_filter_status( string $filter_class, string $label ): void {
+		if ( ! class_exists( $filter_class ) ) {
+			WP_CLI::log( sprintf( '%-32s%s', $label . ':', '— not installed' ) );
+			return;
+		}
+		WP_CLI::log( sprintf( '%-32s%s', $label . ':', $filter_class::is_enabled() ? '✓ enabled' : '✗ disabled' ) );
 	}
 
 	// ── term-comment-shadow-report (v2.12.5 Phase 5) ──────────────────────────

cli/class-tmdo-cli-v2.php

@@ -91,22 +91,29 @@ class TMDO_CLI_V2 {
 					$wpdb->prepare( 'SELECT COUNT(*) FROM information_schema.TABLES WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = %s', $flat_table )
 				);
 
-				$flat_count = $flat_exists
+				// Flat rows holding at least one value (wp_core keeps an all-NULL row per post).
+				$managed_keys = TMDO_Entity_Registry::get_group_keys( $entity_type, $group_name );
+				$has_value    = implode( ' OR ', array_map( static fn( $k ) => '`' . TMDO_Schema_Manager::sanitize_column_name( $k ) . '` IS NOT NULL', $managed_keys ) );
+				$flat_count   = $flat_exists && '' !== $has_value
 					// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching,WordPress.DB.PreparedSQL.InterpolatedNotPrepared
-					? (int) $wpdb->get_var( "SELECT COUNT(*) FROM `{$flat_table}`" )
+					? (int) $wpdb->get_var( "SELECT COUNT(*) FROM `{$flat_table}` WHERE {$has_value}" )
 					: 0;
 
 				// EAV source: count distinct entity IDs that have at least one managed key.
-				$managed_keys = TMDO_Entity_Registry::get_group_keys( $entity_type, $group_name );
-				$eav_table    = $eav_tables[ $entity_type ] ?? '';
-				$eav_count    = 0;
+				$eav_table = $eav_tables[ $entity_type ] ?? '';
+				$eav_count = 0;
 
 				if ( '' !== $eav_table && ! empty( $managed_keys ) ) {
 					$id_col       = ( 'post' === $entity_type ) ? 'post_id' : "{$entity_type}_id";
 					$placeholders = implode( ', ', array_fill( 0, count( $managed_keys ), '%s' ) );
 					// $id_col comes from a hardcoded map; $eav_table is $wpdb->*meta (framework-managed); $placeholders is %s repeats only.
 					// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching,WordPress.DB.PreparedSQL.InterpolatedNotPrepared,WordPress.DB.PreparedSQL.NotPrepared
-					$sql       = "SELECT COUNT(DISTINCT `{$id_col}`) FROM `{$eav_table}` WHERE `meta_key` IN ({$placeholders})";
+					$sql = "SELECT COUNT(DISTINCT m.`{$id_col}`) FROM `{$eav_table}` m WHERE m.`meta_key` IN ({$placeholders})";
+					// A group of some post types only: other posts holding its keys are not its rows.
+					$post_types = 'post' === $entity_type ? TMDO_Entity_Registry::get_group_post_types( 'post', $group_name ) : array();
+					if ( $post_types ) {
+						$sql .= " AND m.post_id IN ( SELECT ID FROM {$wpdb->posts} WHERE post_type IN ('" . implode( "','", array_map( 'esc_sql', $post_types ) ) . "') )";
+					}
 					$eav_count = (int) $wpdb->get_var( $wpdb->prepare( $sql, ...$managed_keys ) ); // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
 				}
 
@@ -152,6 +159,131 @@ class TMDO_CLI_V2 {
 		WP_CLI::success( "Hook Bus: {$state}" );
 	}
 
+	/**
+	 * Set an entity's bridge mode. Goes through TMDO_Mode_Manager::set(): unsafe
+	 * jumps and promotions refused by the Promotion Guard (aeav_only on
+	 * HivePress / WooCommerce sites) fail and leave the mode unchanged.
+	 *
+	 * ## OPTIONS
+	 *
+	 * <entity>
+	 * : post | user | term | comment
+	 *
+	 * <mode>
+	 * : disabled | dual_write | shadow_read | aeav_only
+	 *
+	 * ## EXAMPLES
+	 *
+	 *     wp tmdo bridge-mode user dual_write
+	 *     wp tmdo bridge-mode post disabled
+	 *
+	 * @param array<int, string>    $args       Entity type and mode.
+	 * @param array<string, string> $assoc_args Unused.
+	 */
+	public function bridge_mode( $args, $assoc_args ): void {
+		// phpcs:ignore Generic.CodeAnalysis.UnusedFunctionParameter.FoundAfterLastUsed
+		$entity = (string) ( $args[0] ?? '' );
+		$mode   = (string) ( $args[1] ?? '' );
+		$from   = TMDO_Mode_Manager::get( $entity );
+
+		$result = TMDO_Mode_Manager::set( $entity, $mode );
+		if ( is_wp_error( $result ) ) {
+			WP_CLI::error( $result->get_error_message() );
+		}
+		WP_CLI::success( "{$entity}: {$from} → {$mode}" );
+	}
+
+	/**
+	 * Compare an entity's flat tables with native meta, optionally repairing them.
+	 *
+	 * Reports per key how many values are missing from flat (miss), differ
+	 * (diff) or exist only in flat (extra), and records the outcome per group
+	 * in the wpdo_drift_status option. Read-only unless --fix is given.
+	 *
+	 * ## OPTIONS
+	 *
+	 * <entity>
+	 * : post | user | term | comment
+	 *
+	 * [--group=<group>]
+	 * : Only this group. Default: every backfillable group.
+	 *
+	 * [--sample=<n>]
+	 * : Check n random entities per group instead of all of them.
+	 *
+	 * [--fix]
+	 * : Rebuild drifted flat rows from native meta (native is never written),
+	 * delete rows of deleted entities / other post types, then check again.
+	 * Not combinable with --sample.
+	 *
+	 * [--format=<format>]
+	 * : table or json. Default: table.
+	 *
+	 * ## EXAMPLES
+	 *
+	 *     wp tmdo drift-check post
+	 *     wp tmdo drift-check user --group=activity
+	 *     wp tmdo drift-check post --sample=500
+	 *     wp tmdo drift-check post --fix
+	 *
+	 * @param array<int, string>    $args       Entity type.
+	 * @param array<string, string> $assoc_args Options.
+	 */
+	public function drift_check( $args, $assoc_args ): void {
+		$entity = (string) ( $args[0] ?? '' );
+		$group  = (string) ( $assoc_args['group'] ?? '' );
+		$sample = max( 0, (int) ( $assoc_args['sample'] ?? 0 ) );
+		$fix    = isset( $assoc_args['fix'] );
+		if ( $fix && $sample ) {
+			WP_CLI::error( '--fix repairs every entity; it cannot be combined with --sample.' );
+			return;
+		}
+
+		try {
+			if ( $fix ) {
+				$result = TMDO_Drift_Check::fix( $entity, $group );
+				$report = $result['after'];
+				WP_CLI::log( sprintf( 'Fixed: %d row(s) rebuilt from native, %d cleared, %d stray row(s) deleted.', $result['fixed']['rebuilt'], $result['fixed']['cleared'], $result['fixed']['deleted_rows'] ) );
+			} else {
+				$report = TMDO_Drift_Check::run( $entity, $group, $sample );
+			}
+		} catch ( InvalidArgumentException | RuntimeException $e ) {
+			WP_CLI::error( $e->getMessage() );
+			return;
+		}
+
+		if ( 'json' === ( $assoc_args['format'] ?? 'table' ) ) {
+			WP_CLI::line( (string) wp_json_encode( $report ) );
+			return;
+		}
+
+		$rows = array();
+		foreach ( $report['groups'] as $group => $result ) {
+			foreach ( $result['keys'] as $key => $counts ) {
+				if ( $counts['miss'] + $counts['diff'] + $counts['extra'] > 0 ) {
+					$rows[] = array_merge(
+						array(
+							'group' => $group,
+							'key'   => $key,
+						),
+						$counts
+					);
+				}
+			}
+		}
+		if ( $rows ) {
+			\WP_CLI\Utils\format_items( 'table', $rows, array( 'group', 'key', 'miss', 'diff', 'extra' ) );
+		}
+
+		$total   = $report['total'];
+		$summary = sprintf( '%s: %d group(s)%s — miss=%d diff=%d extra=%d', $entity, count( $report['groups'] ), $sample ? " (sample {$sample})" : '', $total['miss'], $total['diff'], $total['extra'] );
+		if ( $total['miss'] + $total['diff'] + $total['extra'] > 0 ) {
+			WP_CLI::warning( $summary );
+			return;
+		}
+		WP_CLI::success( $summary );
+	}
+
 	/**
 	 * Write an entity's flat-table values back to native meta — the way out of
 	 * aeav_only. Resumable; re-run after an interruption.
@@ -162,7 +294,15 @@ class TMDO_CLI_V2 {
 	 * : post | user | term | comment
 	 *
 	 * [--dry-run]
-	 * : Count the flat rows per group; write nothing.
+	 * : Count the flat rows per group and how their values compare with native
+	 * meta (missing / differs / same / default skipped); write nothing.
+	 *
+	 * [--overwrite]
+	 * : Flat values replace differing native values. Default in aeav_only.
+	 *
+	 * [--only-missing]
+	 * : Only fill native rows that do not exist; never replace. Default in every
+	 * other mode, where native meta is the source of truth.
 	 *
 	 * [--batch=<n>]
 	 * : Rows per batch. Default 500.
@@ -190,17 +330,34 @@ class TMDO_CLI_V2 {
 	public function bridge_restore_native( $args, $assoc_args ): void {
 		$entity = (string) ( $args[0] ?? '' );
 		if ( ! in_array( $entity, TMDO_Entity_Registry::VALID_ENTITY_TYPES, true ) ) {
-			WP_CLI::error( 'Usage: wp tmdo bridge-restore-native <post|user|term|comment> [--dry-run] [--batch=<n>] [--demote] [--group=<group> [--retire]]' );
+			WP_CLI::error( 'Usage: wp tmdo bridge-restore-native <post|user|term|comment> [--dry-run] [--overwrite|--only-missing] [--batch=<n>] [--demote] [--group=<group> [--retire]]' );
 		}
 		$dry_run = isset( $assoc_args['dry-run'] );
 		$group   = sanitize_key( (string) ( $assoc_args['group'] ?? '' ) );
 		if ( isset( $assoc_args['retire'] ) && '' === $group ) {
 			WP_CLI::error( '--retire needs --group=<group>.' );
 		}
-		$report = TMDO_Native_Restorer::run( $entity, $dry_run, (int) ( $assoc_args['batch'] ?? 500 ), isset( $assoc_args['demote'] ), $group );
+		if ( isset( $assoc_args['overwrite'] ) && isset( $assoc_args['only-missing'] ) ) {
+			WP_CLI::error( 'Use either --overwrite or --only-missing, not both.' );
+		}
+		$policy = isset( $assoc_args['overwrite'] ) ? 'overwrite' : ( isset( $assoc_args['only-missing'] ) ? 'only_missing' : '' );
+		$report = TMDO_Native_Restorer::run( $entity, $dry_run, (int) ( $assoc_args['batch'] ?? 500 ), isset( $assoc_args['demote'] ), $group, $policy );
 
+		WP_CLI::log( "Policy: {$report['policy']}" );
 		foreach ( $report['groups'] as $group => $g ) {
-			WP_CLI::log( sprintf( '%s/%s: %d row(s)%s', $entity, $group, $g['rows'], $dry_run ? '' : sprintf( ', %d native value(s) written', $g['written'] ) ) );
+			WP_CLI::log(
+				sprintf(
+					'%s/%s: %d row(s) — native missing %d, differs %d, same %d, default skipped %d%s',
+					$entity,
+					$group,
+					$g['rows'],
+					$g['missing'],
+					$g['differs'],
+					$g['same'],
+					$g['default_skipped'],
+					$dry_run ? '' : sprintf( '; %d native value(s) written', $g['written'] )
+				)
+			);
 		}
 		if ( $dry_run ) {
 			WP_CLI::success( '[dry-run] Nothing written.' );
@@ -217,6 +374,50 @@ class TMDO_CLI_V2 {
 		WP_CLI::success( $report['demoted'] ? "Restored; {$entity} is now dual_write." : 'Restored. Demote the entity to dual_write (admin Entity Bridge tab) before its next write, or re-run with --demote.' );
 	}
 
+	/**
+	 * Find flat text / textarea values stored as the literal "Array" (pre-1.1.0
+	 * type caster) and rewrite them from native meta.
+	 *
+	 * Native rows that are "Array" too cannot be repaired here; they are listed
+	 * so they can be restored from a backup.
+	 *
+	 * ## OPTIONS
+	 *
+	 * [--entity=<entity>]
+	 * : post | user | term | comment. Default: all four.
+	 *
+	 * [--confirm]
+	 * : Write the repairs. Without it the command only reports.
+	 *
+	 * ## EXAMPLES
+	 *
+	 *     wp tmdo repair-array-literals
+	 *     wp tmdo repair-array-literals --entity=user --confirm
+	 *
+	 * @param array<int, string>    $args       Positional arguments (unused).
+	 * @param array<string, string> $assoc_args Named arguments.
+	 */
+	public function repair_array_literals( $args, $assoc_args ): void {
+		$entities = isset( $assoc_args['entity'] ) ? array( (string) $assoc_args['entity'] ) : TMDO_Entity_Registry::VALID_ENTITY_TYPES;
+		$apply    = isset( $assoc_args['confirm'] );
+
+		foreach ( $entities as $entity ) {
+			if ( ! in_array( $entity, TMDO_Entity_Registry::VALID_ENTITY_TYPES, true ) ) {
+				WP_CLI::error( "Unknown entity: {$entity}" );
+			}
+			$report = TMDO_Array_Literal_Repair::run( $entity, $apply );
+			WP_CLI::log( sprintf( '%s: %d "Array" value(s) in flat tables, %d repairable from native, %d repaired.', $entity, $report['found'], $report['repairable'], $report['repaired'] ) );
+			foreach ( $report['unrepairable'] as $row ) {
+				WP_CLI::log( sprintf( '  unrepairable %s/%s #%d (%s)', $row['group'], $row['key'], $row['id'], $row['reason'] ) );
+			}
+			foreach ( $report['native_polluted'] as $row ) {
+				WP_CLI::warning( sprintf( 'native meta is "Array": %s %s #%d — restore it from a backup', $entity, $row['key'], $row['id'] ) );
+			}
+		}
+
+		WP_CLI::success( $apply ? 'Repair finished.' : '[dry-run] Nothing written. Re-run with --confirm to repair.' );
+	}
+
 	/**
 	 * Audit per-module state + shadow_read flags.
 	 *
@@ -849,8 +1050,14 @@ WP_CLI::add_command( 'wpdo bridge-status', array( 'TMDO_CLI_V2', 'bridge_status'
 WP_CLI::add_command( 'tmdo bridge-status', array( 'TMDO_CLI_V2', 'bridge_status' ) );
 WP_CLI::add_command( 'wpdo bridge-set', array( 'TMDO_CLI_V2', 'bridge_set' ) );
 WP_CLI::add_command( 'tmdo bridge-set', array( 'TMDO_CLI_V2', 'bridge_set' ) );
+WP_CLI::add_command( 'wpdo bridge-mode', array( new TMDO_CLI_V2(), 'bridge_mode' ) );
+WP_CLI::add_command( 'tmdo bridge-mode', array( new TMDO_CLI_V2(), 'bridge_mode' ) );
+WP_CLI::add_command( 'wpdo drift-check', array( new TMDO_CLI_V2(), 'drift_check' ) );
+WP_CLI::add_command( 'tmdo drift-check', array( new TMDO_CLI_V2(), 'drift_check' ) );
 WP_CLI::add_command( 'wpdo bridge-restore-native', array( new TMDO_CLI_V2(), 'bridge_restore_native' ) );
 WP_CLI::add_command( 'tmdo bridge-restore-native', array( new TMDO_CLI_V2(), 'bridge_restore_native' ) );
+WP_CLI::add_command( 'wpdo repair-array-literals', array( new TMDO_CLI_V2(), 'repair_array_literals' ) );
+WP_CLI::add_command( 'tmdo repair-array-literals', array( new TMDO_CLI_V2(), 'repair_array_literals' ) );
 WP_CLI::add_command( 'wpdo mode-audit', array( 'TMDO_CLI_V2', 'mode_audit' ) );
 WP_CLI::add_command( 'tmdo mode-audit', array( 'TMDO_CLI_V2', 'mode_audit' ) );
 WP_CLI::add_command( 'wpdo mode-set', array( 'TMDO_CLI_V2', 'mode_set' ) );

cli/class-tmdo-cli.php

@@ -94,6 +94,92 @@ class TMDO_CLI {
 		WP_CLI::success( 'Tables installed. DB version: ' . get_option( 'wpdo_db_version' ) );
 	}
 
+	/**
+	 * Report the flat table of every backfillable group of every entity type,
+	 * plus the installer's migration status and points ledger tables.
+	 *
+	 * @return bool Every table exists.
+	 */
+	public static function check_entity_tables(): bool {
+		global $wpdb;
+
+		$tables = array( $wpdb->prefix . 'wpdo_migration_status', $wpdb->prefix . 'wpdo_user_points_ledger' );
+		foreach ( TMDO_Entity_Registry::VALID_ENTITY_TYPES as $entity_type ) {
+			foreach ( TMDO_Entity_Migration_Engine::backfillable_groups( $entity_type ) as $group ) {
+				$tables[] = TMDO_Schema_Manager::get_table_name( $entity_type, $group );
+			}
+		}
+
+		$ok = true;
+		foreach ( $tables as $t ) {
+			if ( TMDO_IS_SQLITE ) {
+				$exists = $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM sqlite_master WHERE type='table' AND name=%s", $t ) );
+			} else {
+				$exists = $wpdb->get_var( $wpdb->prepare( 'SELECT COUNT(*) FROM information_schema.TABLES WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = %s', $t ) );
+			}
+			if ( $exists ) {
+				// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching,WordPress.DB.PreparedSQL.InterpolatedNotPrepared
+				$rows = (int) $wpdb->get_var( "SELECT COUNT(*) FROM `{$t}`" );
+				WP_CLI::log( "  [OK] {$t} ({$rows} rows)" );
+			} else {
+				WP_CLI::warning( "  [MISSING] {$t} — run `wp wpdo install` to create." );
+				$ok = false;
+			}
+		}
+		return $ok;
+	}
+
+	/**
+	 * Report Promotion Guard violations and the recorded drift status of every
+	 * entity that writes flat tables or has been checked (informational).
+	 */
+	public static function report_guard_and_drift(): void {
+		WP_CLI::log( '' );
+		$violations = TMDO_Promotion_Guard::violations();
+		if ( empty( $violations ) ) {
+			WP_CLI::log( '  [OK] Promotion Guard: no violation' );
+		}
+		foreach ( $violations as $entity_type => $integrations ) {
+			WP_CLI::warning( "  [GUARD] {$entity_type} is aeav_only while " . implode( ', ', $integrations ) . " reads native meta — write flat back with `wp tmdo bridge-restore-native {$entity_type} --demote`." );
+		}
+		$deferred = array_keys( (array) get_option( TMDO_Schema_Manager::DEFERRED_OPTION, array() ) );
+		if ( $deferred ) {
+			WP_CLI::warning( '  [SCHEMA] groups using native meta until their table upgrade and the drift resync after it (tmdo_drift_resync) are done: ' . implode( ', ', $deferred ) . '.' );
+		}
+		$pending = TMDO_Schema_Manager::pending_indexes();
+		if ( $pending ) {
+			WP_CLI::warning( '  [INDEX] declared indexes not added yet: ' . implode( ', ', $pending ) . ' — still missing after this run: another process is adding them, or the ALTER failed (see the `schema.index_failed` log).' );
+		}
+
+		$status = get_option( TMDO_Drift_Check::OPTION, array() );
+		$status = is_array( $status ) ? $status : array();
+		WP_CLI::log( 'Drift (last `wp tmdo drift-check` or daily sample):' );
+		foreach ( TMDO_Entity_Registry::VALID_ENTITY_TYPES as $entity_type ) {
+			$groups = TMDO_Entity_Migration_Engine::backfillable_groups( $entity_type );
+			// Records of groups no longer registered can be neither re-checked nor fixed.
+			$last = array_intersect_key( (array) ( $status[ $entity_type ] ?? array() ), array_flip( $groups ) );
+			if ( empty( $groups ) || ( empty( $last ) && ! TMDO_Mode_Manager::writes_to_flat( $entity_type ) ) ) {
+				continue;
+			}
+			if ( empty( $last ) ) {
+				WP_CLI::log( "  {$entity_type}: never checked — run `wp tmdo drift-check {$entity_type}`" );
+				continue;
+			}
+			$drifting = array();
+			foreach ( $last as $group => $s ) {
+				if ( (int) $s['miss'] + (int) $s['diff'] + (int) $s['extra'] > 0 ) {
+					$drifting[] = sprintf( '%s miss=%d diff=%d extra=%d', $group, $s['miss'], $s['diff'], $s['extra'] );
+				}
+			}
+			$oldest = min( array_column( $last, 'checked_at' ) );
+			if ( $drifting ) {
+				WP_CLI::warning( "  {$entity_type}: " . implode( '; ', $drifting ) . " (checked {$oldest} UTC or later) — `wp tmdo drift-check {$entity_type} --fix`" );
+			} else {
+				WP_CLI::log( sprintf( '  [OK] %s: %d group(s) clean (oldest check %s UTC)', $entity_type, count( $last ), $oldest ) );
+			}
+		}
+	}
+
 	/**
 	 * Run health check on all tables.
 	 *
@@ -195,30 +281,12 @@ class TMDO_CLI {
 			WP_CLI::log( $exists ? "  [OK] {$t}" : "  [NOT CREATED] {$t} (will be created on first use)" );
 		}
 
-		// Check user entity flat tables (v2.5.5+).
-		$user_entity_tables = array(
-			$wpdb->prefix . 'wpdo_user_membership',
-			$wpdb->prefix . 'wpdo_user_activity',
-			$wpdb->prefix . 'wpdo_user_profile',
-			$wpdb->prefix . 'wpdo_user_sso',
-			$wpdb->prefix . 'wpdo_user_points_ledger',
-			$wpdb->prefix . 'wpdo_migration_status',
-		);
-		foreach ( $user_entity_tables as $t ) {
-			if ( TMDO_IS_SQLITE ) {
-				$exists = $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM sqlite_master WHERE type='table' AND name=%s", $t ) );
-			} else {
-				$exists = $wpdb->get_var( $wpdb->prepare( 'SELECT COUNT(*) FROM information_schema.TABLES WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = %s', $t ) );
-			}
-			if ( $exists ) {
-				// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching,WordPress.DB.PreparedSQL.InterpolatedNotPrepared
-				$rows = (int) $wpdb->get_var( "SELECT COUNT(*) FROM `{$t}`" );
-				WP_CLI::log( "  [OK] {$t} ({$rows} rows)" );
-			} else {
-				WP_CLI::warning( "  [MISSING] {$t} — run \`wp wpdo install\` to create." );
-				$all_ok = false;
-			}
+		// Entity flat tables, from the registry (was a hard-coded user list that
+		// named the never-registered sso group).
+		if ( ! self::check_entity_tables() ) {
+			$all_ok = false;
 		}
+		self::report_guard_and_drift();
 
 		// Check partner plugin custom tables via Custom Table Registry (v2.6.0+).
 		if ( class_exists( 'TMDO_Custom_Table_Registry' ) ) {

composer.json

@@ -36,7 +36,7 @@
     "scripts": {
         "test": "phpunit --configuration phpunit.xml",
         "test:integration": "phpunit --configuration phpunit-integration.xml",
-        "phpcs": "phpcs --standard=WordPress includes/ admin/ cli/ modules/ 2meet-data-optimizer.php uninstall.php",
+        "phpcs": "phpcs --standard=phpcs.xml",
         "stan": "phpstan analyse --no-progress",
         "stan:baseline": "phpstan analyse --no-progress --generate-baseline=phpstan-baseline.neon"
     },

docs/BENCHMARK-SCALE.md

@@ -63,6 +63,41 @@ SQL 的形狀與實際程式一致：原生是 WP_Query 的 meta_query（每個
 6. **dual_write 的寫入成本約為兩倍（0.22 ms 對 0.12 ms）**，絕對值很小，不是瓶頸。
 7. **Hot 表和 Entity 表儲存了同一份 listing 資料**（合計約 608 MB），兩者功能重疊。
 
+## 前台與寫入鏈實測（dev36，Release 2.1，2026-09-26）
+
+上面的數字是純 SQL。這一節是真實站台（dev36：HivePress 1.7.31 + Marketplace、WooCommerce 11.1.2、Redis object cache、listing 約 10 萬筆）上的整頁與整條寫入鏈，決策背景見 `adr-004-search-index-mode-for-hp-wc.md`。
+
+**前台搜尋**（`tests/live/tools/fe.sh`：每個 URL 5 次取中位數，`X-S36-Ms` = 整個請求到 `template_redirect`）。「routed」是 post 模式 shadow_read + 核心 2.1 router + HivePress AddOn 0.2.0；「1.0.x」是整合測試當時的 router（報告 `notes/tmdo-integration-test-dev36-2026-09-26.md`）。
+
+| URL | 原生 ms | 1.0.x ms | 2.1 routed ms | ids 與原生相同 |
+|---|---:|---:|---:|---|
+| listing 價格區間 | 614 | 496 | **323** | 是 |
+| listing 價格區間 + `_sort=price__asc` | 975 | 1,062 | **435** | 是 |
+| listing 時薪區間 + `_sort=hourly_rate__desc` | 850 | — | **367** | 是 |
+| listing `_sort=rating__desc` | 1,697 | 1,720 | **866** | 是 |
+| listing 關鍵字 + 價格區間 | 754 | — | 764 | 是 |
+| vendor 時薪區間 | 102 | — | 97 | 是 |
+| WC 商店價格篩選 / 價格排序 | 94 / 111 | 88–94 | 109 / 88 | 是（WC 用 lookup 表，不經 router） |
+
+（R-2.1 驗收，扁平表已從原生回填、含 PR-062c；兩輪量測見 `notes/tmdo-acceptance-2.1-2026-09-26.md`。）
+
+- HivePress 搜尋仍帶 tax_query（排除一個 term），WordPress 因此加上 `GROUP BY posts.ID`，排序需要 temporary + filesort；這是目前 311–428 ms 的主要成本，尚未達到 R-2.1 的 300 ms 目標。
+- PR-062b 之前，routed 搜尋因 `posts_request` 改寫而失去 WordPress 的 split query，改撈整列 `posts.*`：同一條 SQL 撈 `*` 要 590 ms，只撈 ID 為 312 ms。
+- PR-062c 之前，依扁平欄位排序的 routed 查詢由 `wp_posts`（type / status 索引，約 56k 列）驅動、逐筆查扁平表再以 temporary table 排序；拿掉 GROUP BY 或只換 tie-break 都無效（約 300 ms），改由扁平表驅動並把 tie-break 改讀 `post_id` 後只剩單表 filesort：`meta_value_num` 263→147 ms、具名排序 250→142 ms、HP 時薪篩選 + 排序 300→36 ms（只計 SQL）。依日期排序的搜尋由扁平表驅動反而變慢（74→137 ms），所以 flat-first 只用在扁平欄位排序。
+- 量測 gotcha：symlink 切換（`plugins/` → `plugins-dev`）後，PHP-FPM 的 opcache（`revalidate_path=0`）仍執行舊目標的程式，WP-CLI 不受影響；前台數字要先確認實際載入的檔案。
+
+**WP_Query**（`tests/live/tools/qbench.php`，`fields=ids`，20 筆一頁）：價格區間 296→76 ms、價格 + verified 360→53 ms、rating ≥ 4.5 248→33 ms、rate + `_thumbnail_id` EXISTS 24→9 ms；OR、多 post type、無 type 數值比較等維持原生，結果與原生相同。
+
+**寫入鏈開銷**（單一程序，disabled 與 dual_write 交替兩輪取平均）：
+
+| 寫入 | disabled | dual_write | 增加 |
+|---|---:|---:|---:|
+| HP listing | 754 ms / 348 q | 976 ms / 434 q | +29% |
+| WC product | 215 ms / 129 q | 489 ms / 206 q | +127% |
+| vendor（user + post） | 444 ms / 162 q | 630 ms / 230 q | +42% |
+
+WC product 的成本來自 `wc_product` 群組，Release 2.2 移除 WC 扁平化後消失。
+
 ## 優化候選（待使用者確認後排入 backlog）
 
 | # | 候選 | 針對 | 預期效果 |

docs/adr-004-search-index-mode-for-hp-wc.md

@@ -0,0 +1,120 @@
+# ADR-004：HivePress / WooCommerce 站採「搜尋索引模式」
+
+- **狀態**：已接受（2026-09-26）
+- **日期**：2026-09-26
+- **相關**：dev36 整合測試報告（`notes/tmdo-integration-test-dev36-2026-09-26.md`）、ADR-001、ADR-003、backlog PR-052〜PR-063（Release 2.1）
+
+## 背景
+
+2026-09-26 在 dev36（HivePress 1.7.31 + Marketplace + 10 個擴充、WooCommerce 11.1.2、Redis、10 萬筆 listing）做整合與壓力測試，確認：
+
+1. **HivePress model 與 WC data store 用空 key 讀 meta**（`get_post_meta( $id )`），1.0.x 的 Hook Bus 對空 key 放行、只讀原生。所以 aeav_only 或 cleanup 之後，HP 的 verified / rating、WC 的價格與顧客資料讀成空值（dev20 / dev21 盤點：WC 商品 0/20 可購買）。
+2. **WC 以直接 SQL 更新 `_stock`、`total_sales`**，扁平表跟不上。
+3. **shadow_read 會遺失寫入**：WP 的 `update_metadata()` 經 `get_metadata_raw` 讀舊值，攔截器從扁平表回答，新舊相同就不寫原生。
+4. **Router 在 OR、LIKE、多 post type、跨 group、具名 orderby 上結果錯誤**，HivePress 的 `_sort` 沒被改寫，前台搜尋幾乎沒有變快。
+5. **陣列值被存成 `"Array"`**。
+
+帶 key 的單筆讀取本來就沒有速度優勢：`update_meta_cache()` 一次載入全部 key，之後都是記憶體讀取。扁平表真正的價值在**搜尋與篩選**（`BENCHMARK-SCALE.md` 結論 1、2）。
+
+## 決策（使用者 2026-09-26）
+
+1. **HP / WC 站採「搜尋索引模式」**：原生 meta 是唯一真實資料來源，扁平表是它的搜尋索引。模式最高到 `shadow_read`；`aeav_only` 與 cleanup 由 Promotion Guard 擋下。
+2. **移除 WC 扁平化**（Release 2.2：core 的 `post/wc_product` 群組、WC AddOn 的 user `hot` 群組與 hot-zone 欄位）。
+3. **既有 aeav_only 站（dev20 / 21 / 22）先唯讀盤點**，處置由使用者決定（`notes/ops-aeav-sites-audit-2026-09-26.md`）。
+4. **分兩版**：2.1 = 止血 + 資料正確性 + Router 與 HP 排序；2.2 = 範圍收斂 + 漂移偵測 + CLI 與診斷。
+
+## 設計（Release 2.1）
+
+### 寫入：扁平表跟隨原生
+
+- **dual_write / shadow_read** 下，pre-filter（`update_/add_/delete_{type}_metadata`）只做路由判斷後回 `null`，讓 WordPress 自己寫原生。
+- 扁平表在 `added_ / updated_ / deleted_{type}_meta` action（priority 1）裡**從原生重新同步**：直接 SQL 讀原生第一筆 row（`ORDER BY meta_id LIMIT 1`，不經 filter），扁平值 = `to_db( maybe_unserialize( v ) )`，原生沒有 row 時設為 NULL（`TMDO_Hook_Bus::sync_from_native()`）。
+- `delete_metadata( …, $delete_all )`：`deleted_` action 拿到的 object id 是 0，所以在 `delete_{type}_meta` 先記下 object ids。
+- `update_metadata_by_mid()` 改 key：新舊兩個 key 都重新同步。
+- 原生沒有值時只把既有列的欄位設為 NULL，**不新增列**：刪除實體時 adapter 先刪扁平列，WordPress 才逐筆刪 meta。
+- **aeav_only** 保留原本的 pre-filter short-circuit（非 HP / WC 站仍可使用）。
+
+### 讀取：shadow_read = 讀原生、抽樣比對扁平
+
+`intercept_get` 在 shadow_read 回 `$check`（讓 WordPress 讀原生），並以 `tmdo_shadow_compare_sample_rate`（預設 0.1）抽樣比對扁平值、記錄差異。查詢加速不受影響，因為 Router 仍由 `reads_from_flat()`（shadow_read 以上）控制。
+
+### Promotion Guard
+
+`TMDO_Promotion_Guard`，由 `TMDO_Mode_Manager::set()`、`TMDO_Post_Migration::cleanup()` 與 `TMDO_Phase_Cleanup::execute()` 呼叫：
+
+- HivePress 啟用時，post / user / term / comment 不得升到 aeav_only 或執行 cleanup；WooCommerce 啟用時，post / user 不得。
+- 回傳 `WP_Error( 'promotion_guarded' )`；特殊情況用 filter `tmdo_promotion_guard_allow` 放行。
+- 已經在 aeav_only 的站**讀取時不強制降級**（降級會讀到空的原生），只在後台顯示 notice。處置用 `wp tmdo bridge-restore-native <entity> --demote`。
+
+### 回寫原生（bridge-restore-native）
+
+依模式決定策略：aeav_only 預設 `overwrite`（寫入只到扁平表、原生已過期），其他模式預設 `only_missing`（原生可能較新，例如 WC 直接 SQL 寫庫存）。相同的值不重寫；扁平值等於欄位 default 且原生沒有 row 時不寫（不捏造預設值）。
+
+### 序列化值
+
+`text` / `textarea` 遇到陣列或物件時 `maybe_serialize()`，讀出時 `TMDO_Safe_Unserialize`；`text`（VARCHAR(255)）超長存 NULL 並記 `text_overflow`。既有的 `"Array"` 由 `wp tmdo repair-array-literals` 從原生修復。
+
+### Router：只在語意與原生相同時路由
+
+`TMDO_Post_Query_Router`（`pre_get_posts` priority 1000，排在外掛於預設 priority 加的條件之後）：
+
+- **全有或全無**：任何一個已註冊 key 的 clause 不能路由，整個查詢交回 WordPress。不能路由的情況：
+  - top-level OR
+  - 含已註冊 key 的巢狀 group（排序形狀除外）
+  - 多個 post type
+  - 白名單以外的 compare
+  - type 與欄位語意不同：無 type（CHAR）的數值範圍比較、decimal 欄位的 CHAR 比較、text 欄位用 NUMERIC
+- **LIKE** 包成 `%esc_like%`。
+- **每個 group 各自 LEFT JOIN**；扁平表一文章一列（UNIQUE `post_id`），不加 GROUP BY。
+- 狀態 / 日期副本路由遇到 NOT EXISTS 時停用：INNER JOIN 會漏掉沒有扁平列的文章。
+- **排序**（`wpdo_post_sort`）：
+  - **HivePress `_sort` 形狀**：OR 裡剛好是同 key、同 type 的 NOT EXISTS + EXISTS，其中一個具名，並且是唯一的 orderby。這個 group 從 meta_query 移除，改成 LEFT JOIN 扁平表並 `ORDER BY col, ID DESC`；ASC 時 NULL 排最前，與原生相同。
+  - **具名 clause** 作為唯一的 orderby。
+  - **`meta_key` + `meta_value_num`**（字串欄位用 `meta_value`），加上 `col IS NOT NULL`（原生是 INNER JOIN）。
+  - 欄位排序不等於 `CAST( meta_value AS type )` 時退回原生。
+- **flat-first**：依扁平欄位排序、且 routed 條件已要求扁平列存在（同一 group、非 NOT EXISTS）、沒有 `post__in` / `author` 等高選擇性條件時，改寫成 `SELECT STRAIGHT_JOIN … FROM flat INNER JOIN wp_posts`，ORDER BY 的 `wp_posts.ID` 改讀等值的 `post_id`，排序只在一張表完成。依日期排序的搜尋不套用（由 posts 驅動較快）。filter `tmdo_router_flat_first` 可關閉。
+- **維持 WordPress 的 split query**：`posts_request` 移除 `SQL_CALC_FOUND_ROWS`（總數改由快取的 COUNT 回答）會讓 WordPress 以為 request 被改過而撈整列。`split_the_query` 對 routed 查詢恢復 ID-first，`posts_request_ids` 再移除一次 `SQL_CALC_FOUND_ROWS`。
+
+HivePress AddOn 0.2.0 在 post router 啟用時不再綁定舊的 hot-zone `optimize_query` / `optimize_search`。
+
+## 設計（Release 2.2）
+
+### 範圍收斂
+
+- core 不再註冊 `post/wc_product`；WooCommerce AddOn 0.2.0 不再註冊 product / order / subscription 的 zone 欄位與 user `hot` 群組。WooCommerce 的 meta 只存在原生。既有表以 `bridge-restore-native post --group=wc_product --retire` 封存。
+
+### 漂移偵測與修復（`TMDO_Drift_Check`）
+
+- `wp tmdo drift-check <entity>` 以值比對扁平與原生（第一筆原生 row → 安全 unserialize → `Type_Caster::to_db`），逐 key 回報 miss / diff / extra，結果寫入 `wpdo_drift_status`。
+- `--fix` 從原生重建漂移列，刪除已刪實體與非本 group post type 的列，不寫原生。
+- **aeav_only 不適用**：那時扁平才是真實資料，原生本來就過期。`--fix` 拒絕、每日抽樣略過、Router 不因漂移退回原生。
+- **Router**：上次檢查有漂移的 group 不路由，整個查詢維持原生；從未檢查的 group 照常路由（決策 2026-09-27：升級後不變慢）。
+- **每日抽樣**：`wpdo_daily_health_check`，每 group 500 筆。
+- **Hook Bus 關閉期間的寫入**：entity 從 disabled 進入 dual_write / shadow_read、或 Hook Bus flag 由關轉開時，60 秒後 `tmdo_drift_resync` 執行全量 `--fix`。不用 `post_modified_gmt` 增量，因為 WooCommerce 直接 SQL 寫 meta 不會更新它。
+- **Auto-promoter** 以 `clean_since()`（2 天內乾淨的檢查）取代 shadow diff 數量；Promotion Guard 仍擋 HP / WC 站。
+
+### 查詢
+
+- 純排序搜尋（HivePress `_sort`、沒有路由篩選）在該 post type 每篇都有扁平列時改由扁平表驅動；Router 在 `wp_insert_post` 替新文章建空列，覆蓋率快取 15 分鐘。
+
+## 後果
+
+**好處**
+
+- 資料正確性回到 WordPress 原生語意：HP / WC 的空 key 讀取、直接 SQL 寫入都不再造成資料不一致或遺失。
+- 查詢加速保留，而且擴及 HivePress 前台的篩選與排序（實測見 `BENCHMARK-SCALE.md`「前台與寫入鏈實測」）。
+- 任何時候都可以降回 disabled，原生資料完整。
+
+**代價與限制**
+
+- **寫入開銷**：dual_write / shadow_read 每次 meta 寫入多一次原生讀取與一次扁平寫入。dev36 實測 HP listing 整條寫入鏈 +29%、WC product +127%（後者在 2.2 移除 WC 扁平化後消失）。
+- **沒有讀取加速**：帶 key 的單筆讀取仍走原生（WordPress meta cache）。
+- **漂移**：繞過 meta API 的寫入（直接 SQL、Hook Bus 關閉期間的匯入）會讓扁平表過期，Router 會回傳過期的篩選結果。2.2 起由 `drift-check`（每日抽樣、Router 避開漂移中的 group）與重新啟用時的全量 `--fix` 處理；兩次抽樣之間的漂移仍可能短暫回傳過期結果，大量匯入後可手動執行 `drift-check <entity> --fix`。
+- **decimal 欄位搭配 NUMERIC / DECIMAL**：原生先 CAST 成整數（`DECIMAL` 預設 (10,0)），扁平表精確比較，因此帶小數的值在區間邊界上可能不同。dev36 資料沒有這種值。
+- **text 欄位超過 255 字元**存 NULL，這類值的篩選結果會與原生不同（有 `text_overflow` 記錄）。
+- HivePress 搜尋 p50 為 321–866 ms（原生 600–1,713 ms），尚未達到 R-2.1 的 300 ms 目標（驗收：`notes/tmdo-acceptance-2.1-2026-09-26.md`）。價格篩選頁的 SQL 只剩約 75 ms、其餘為頁面渲染；純排序（如 `rating__desc`）必須 LEFT JOIN 保留沒有值的文章，無法 flat-first。
+
+## 不在範圍內
+
+- aeav_only 的空 key 讀取合併（B02）：HP / WC 站不再使用 aeav_only，是否實作依其他站需求決定。
+- Hot zone 的移除（ADR-003 的後續步驟）。

includes/class-tmdo-cache-layer.php

@@ -40,7 +40,7 @@ class TMDO_Cache_Layer {
 		}
 
 		$cold_keys = TMDO_Schema_Registry::instance()->get_cold_meta_keys( $post_type );
-		if ( empty( $cold_keys ) ) {
+		if ( empty( $cold_keys ) || ! self::cold_active( $post_type ) ) {
 			return;
 		}
 
@@ -49,7 +49,7 @@ class TMDO_Cache_Layer {
 		// Check which IDs are already cached.
 		$uncached = array();
 		foreach ( $post_ids as $pid ) {
-			$cached = wp_cache_get( "cold_{$pid}", $group );
+			$cached = wp_cache_get( TMDO_Zone_Cold::cache_key( (int) $pid, $post_type ), $group );
 			if ( false === $cached ) {
 				$uncached[] = (int) $pid;
 			}
@@ -94,7 +94,7 @@ class TMDO_Cache_Layer {
 		// Cache all results (including empty arrays for posts with no cold data).
 		foreach ( $uncached as $pid ) {
 			$data = $fetched[ $pid ] ?? array();
-			wp_cache_set( "cold_{$pid}", $data, $group, $ttl );
+			wp_cache_set( TMDO_Zone_Cold::cache_key( $pid, $post_type ), $data, $group, $ttl );
 		}
 	}
 
@@ -108,33 +108,46 @@ class TMDO_Cache_Layer {
 	 */
 	public static function warm_post( int $post_id, string $post_type ): void {
 		$cold_keys = TMDO_Schema_Registry::instance()->get_cold_meta_keys( $post_type );
-		if ( empty( $cold_keys ) ) {
+		if ( empty( $cold_keys ) || ! self::cold_active( $post_type ) ) {
 			return;
 		}
 
 		// Force a fresh read from DB (bypasses cache).
 		$group = 'wpdo_cold_' . sanitize_key( $post_type );
-		wp_cache_delete( "cold_{$post_id}", $group );
+		wp_cache_delete( TMDO_Zone_Cold::cache_key( $post_id, $post_type ), $group );
 
 		// Re-read will populate cache.
 		TMDO_Zone_Cold::get_blob( $post_id, $post_type );
 	}
 
+	/**
+	 * Whether the cold zone holds data for this post type: its module writes
+	 * to the cold table and the table exists. Registered cold fields alone do
+	 * not mean either (zero side effect while the module is idle).
+	 *
+	 * @param string $post_type Post type.
+	 * @return bool
+	 */
+	private static function cold_active( string $post_type ): bool {
+		return TMDO_Feature_Flags::is_write_active( TMDO_Zone_Router::module_name( 'cold', $post_type ) )
+			&& TMDO_Schema_Manager::table_exists( TMDO_Zone_Cold::table( $post_type ) );
+	}
+
 	/**
 	 * Flush all cold cache for a post type.
 	 *
-	 * Useful after bulk imports or schema changes.
+	 * Useful after bulk imports or schema changes. Bumps the post type's cache
+	 * version (new keys from now on) instead of wp_cache_flush_group(), which
+	 * Redis Object Cache runs as one server-side scan that blocks Redis on a
+	 * large group; older entries expire by their TTL.
 	 *
 	 * @param string $post_type Post type to flush.
 	 */
 	public static function flush_group( string $post_type ): void {
-		$group = 'wpdo_cold_' . sanitize_key( $post_type );
-
-		if ( function_exists( 'wp_cache_flush_group' ) ) {
-			wp_cache_flush_group( $group );
-		}
-		// If wp_cache_flush_group is not available (older WP or no object cache),
-		// individual entries will expire via TTL.
+		$versions               = get_option( TMDO_Zone_Cold::CACHE_VERSION_OPTION, array() );
+		$versions               = is_array( $versions ) ? $versions : array();
+		$versions[ $post_type ] = (int) ( $versions[ $post_type ] ?? 0 ) + 1;
+		update_option( TMDO_Zone_Cold::CACHE_VERSION_OPTION, $versions, true );
 	}
 
 	/**
@@ -170,7 +183,7 @@ class TMDO_Cache_Layer {
 		return array(
 			'groups'           => $groups,
 			'prefetch_support' => true,
-			'flush_support'    => function_exists( 'wp_cache_flush_group' ),
+			'flush_support'    => true,
 		);
 	}
 

includes/class-tmdo-core.php

@@ -261,6 +261,9 @@ class TMDO_Core {
 			$post_router = new TMDO_Post_Query_Router();
 			$post_router->register_hooks();
 		}
+		if ( class_exists( 'TMDO_Post_Query_Router' ) ) {
+			add_action( 'clean_post_cache', array( 'TMDO_Post_Query_Router', 'bump_count_version' ) );
+		}
 
 		// Zone B: Warm cleanup cron handler.
 		add_action( 'wpdo_warm_cleanup', array( $this, 'cleanup_warm_zone' ) );
@@ -296,6 +299,19 @@ class TMDO_Core {
 		// v2.3.0 M6: daily health probe cron.
 		add_action( 'wpdo_daily_health_check', array( 'TMDO_Health_Cron', 'run' ) );
 
+		// 1.2.0: daily flat-vs-native drift sample (read by the post query router).
+		add_action( 'wpdo_daily_health_check', array( 'TMDO_Drift_Check', 'cron_tick' ) );
+
+		// 1.2.0: rebuild flat from native after writes bypassed it (entity was
+		// disabled, or the Hook Bus was off).
+		add_action( 'wpdo_bridge_mode_changed', array( 'TMDO_Drift_Check', 'on_mode_changed' ), 10, 3 );
+		add_action( 'update_option_' . TMDO_Hook_Bus_Bridge::OPTION, array( 'TMDO_Drift_Check', 'on_hook_bus_toggled' ), 10, 2 );
+		add_action( 'add_option_' . TMDO_Hook_Bus_Bridge::OPTION, array( 'TMDO_Drift_Check', 'on_hook_bus_added' ), 10, 2 );
+		add_action( TMDO_Drift_Check::RESYNC_HOOK, array( 'TMDO_Drift_Check', 'run_scheduled_fix' ) );
+
+		// 1.3.0: declared indexes a visitor request left for WP-Cron.
+		add_action( TMDO_Schema_Manager::INDEXES_HOOK, array( 'TMDO_Schema_Manager', 'ensure_pending_indexes' ) );
+
 		// v2.3.0 M6: daily snapshot prune cron (paired with health check).
 		add_action( 'wpdo_snapshot_prune_daily', array( 'TMDO_Snapshot_Pruner', 'cron_run' ) );
 

includes/class-tmdo-installer.php

@@ -788,6 +788,8 @@ class TMDO_Installer {
 		wp_clear_scheduled_hook( 'wpdo_health_snapshot_monthly' );
 		wp_clear_scheduled_hook( 'wpdo_post_shadow_verify' );
 		wp_clear_scheduled_hook( 'wpdo_term_comment_shadow_verify' );
+		wp_clear_scheduled_hook( 'tmdo_drift_resync' );
+		wp_clear_scheduled_hook( 'tmdo_ensure_group_indexes' );
 		wp_clear_scheduled_hook( 'wpdo_post_stress_test_batch' );
 		wp_clear_scheduled_hook( 'wpdo_user_stress_test_batch' );
 		wp_clear_scheduled_hook( 'wpdo_term_stress_test_batch' );
@@ -991,6 +993,8 @@ class TMDO_Installer {
 			'wpdo_health_snapshot_monthly',
 			'wpdo_post_shadow_verify',
 			'wpdo_term_comment_shadow_verify',
+			'tmdo_drift_resync',
+			'tmdo_ensure_group_indexes',
 			'wpdo_post_stress_test_batch',
 			'wpdo_user_stress_test_batch',
 			'wpdo_term_stress_test_batch',

includes/class-tmdo-logger.php

@@ -48,7 +48,7 @@ class TMDO_Logger {
 	/**
 	 * Log an INFO-level event (event-based signature, used by v2.0.0 engine code).
 	 *
-	 * Writes only to PHP error_log; does NOT touch wpdo_errors (which is reserved
+	 * Writes only to PHP error_log, and only when debug logging is on; does NOT touch wpdo_errors (which is reserved
 	 * for actual errors). Mode changes / cache flushes / audit prunes call here
 	 * many times per request — keeping them out of the DB error table.
 	 *
@@ -57,19 +57,36 @@ class TMDO_Logger {
 	 * @return void
 	 */
 	public static function info( string $event, array $context = array() ): void {
+		// Routine events: only with WP_DEBUG_LOG (filter `tmdo_log_info`), or every
+		// CLI run and production request would flood the log.
+		if ( ! apply_filters( 'tmdo_log_info', defined( 'WP_DEBUG_LOG' ) && WP_DEBUG_LOG ) ) {
+			return;
+		}
+		self::write_info( $event, $context );
+	}
+
+	/**
+	 * Write an INFO line to the PHP error log.
+	 *
+	 * @param string               $event   Event name.
+	 * @param array<string, mixed> $context Structured context.
+	 * @return void
+	 */
+	private static function write_info( string $event, array $context ): void {
 		error_log( sprintf( '[WPDO][INFO][%s] %s', $event, $context ? wp_json_encode( $context, JSON_UNESCAPED_UNICODE ) : '' ) );
 	}
 
 	/**
-	 * Log a NOTICE-level event — alias of info() for callers that want a stronger
-	 * level intent. Same routing (error_log only).
+	 * Log a NOTICE-level event: always written to the PHP error log (unlike
+	 * info()), for the audit trail of operator actions such as mode changes
+	 * and snapshot deletions.
 	 *
-	 * @param string $event   Event name.
-	 * @param array  $context Structured context.
+	 * @param string               $event   Event name.
+	 * @param array<string, mixed> $context Structured context.
 	 * @return void
 	 */
 	public static function notice( string $event, array $context = array() ): void {
-		self::info( $event, $context );
+		error_log( sprintf( '[WPDO][NOTICE][%s] %s', $event, $context ? wp_json_encode( $context, JSON_UNESCAPED_UNICODE ) : '' ) );
 	}
 
 	/**
@@ -97,7 +114,7 @@ class TMDO_Logger {
 	 */
 	public static function debug( string $event, array $context = array() ): void {
 		if ( defined( 'WP_DEBUG' ) && WP_DEBUG ) {
-			self::info( $event, $context );
+			self::write_info( $event, $context );
 		}
 	}
 

includes/class-tmdo-post-shadow-verifier.php

@@ -55,7 +55,7 @@ final class TMDO_Post_Shadow_Verifier {
 	 * is available.
 	 *
 	 * @param string   $post_type   WP post_type to sample.
-	 * @param string   $group_name  Entity group name (e.g. 'wc_product').
+	 * @param string   $group_name  Entity group name (e.g. 'hp_listing_core').
 	 * @param string   $flat_table  Fully qualified flat table name.
 	 * @param string[] $keys        Meta keys to compare (each post checks all).
 	 * @param int      $sample_size Number of posts to sample (capped to DB count).

includes/class-tmdo-rest-api.php

@@ -23,6 +23,9 @@ if ( ! defined( 'ABSPATH' ) ) {
  */
 class TMDO_REST_API {
 
+	/** Blocked views are counted 1 in this many (wpdo_rl_stats). */
+	private const RL_STATS_SAMPLE = 10;
+
 	const NAMESPACE = 'wpdo/v1';
 
 	/**
@@ -37,6 +40,8 @@ class TMDO_REST_API {
 			array(
 				'methods'             => WP_REST_Server::READABLE,
 				'callback'            => array( $this, 'get_listings' ),
+				// Public by design: viewable post types and published posts only, fields
+				// declared show_in_rest only (1.1.1), per_page capped (wpdo_rest_max_per_page).
 				'permission_callback' => '__return_true',
 				'args'                => $this->listings_args(),
 			)
@@ -48,6 +53,8 @@ class TMDO_REST_API {
 			array(
 				'methods'             => WP_REST_Server::READABLE,
 				'callback'            => array( $this, 'get_listing' ),
+				// Public by design: the post must be viewable to the request (assert_post_viewable_or_error:
+				// publicly viewable or read_post); fields declared show_in_rest only (1.1.1).
 				'permission_callback' => '__return_true',
 				'args'                => array(
 					'id' => array(
@@ -65,6 +72,7 @@ class TMDO_REST_API {
 			array(
 				'methods'             => WP_REST_Server::READABLE,
 				'callback'            => array( $this, 'get_stats' ),
+				// Public by design: view / engagement counters of a post viewable to the request.
 				'permission_callback' => '__return_true',
 				'args'                => array(
 					'id' => array(
@@ -82,6 +90,8 @@ class TMDO_REST_API {
 			array(
 				'methods'             => WP_REST_Server::CREATABLE,
 				'callback'            => array( $this, 'post_view' ),
+				// Public by design: anonymous visitors count views; viewable posts only, one view
+				// per IP per post per hour (rate limited).
 				'permission_callback' => '__return_true',
 				'args'                => array(
 					'id' => array(
@@ -718,14 +728,18 @@ class TMDO_REST_API {
 
 		if ( $cookie_blocked || $ip_blocked ) {
 			// Track rate-limit hits per post for admin visibility, capped at 100 entries.
-			$rl_stats                      = get_option( 'wpdo_rl_stats', array() );
-			$rl_stats[ (string) $post_id ] = ( (int) ( $rl_stats[ (string) $post_id ] ?? 0 ) ) + 1;
-			if ( count( $rl_stats ) > 100 ) {
-				// Keep only the top-100 posts by hit count to bound option size.
-				arsort( $rl_stats );
-				$rl_stats = array_slice( $rl_stats, 0, 100, true );
+			// Sampled (1 in RL_STATS_SAMPLE, each sample adding RL_STATS_SAMPLE) so
+			// anonymous requests cannot turn every blocked view into an option write.
+			if ( 1 === wp_rand( 1, self::RL_STATS_SAMPLE ) ) {
+				$rl_stats                      = get_option( 'wpdo_rl_stats', array() );
+				$rl_stats[ (string) $post_id ] = ( (int) ( $rl_stats[ (string) $post_id ] ?? 0 ) ) + self::RL_STATS_SAMPLE;
+				if ( count( $rl_stats ) > 100 ) {
+					// Keep only the top-100 posts by hit count to bound option size.
+					arsort( $rl_stats );
+					$rl_stats = array_slice( $rl_stats, 0, 100, true );
+				}
+				update_option( 'wpdo_rl_stats', $rl_stats, false );
 			}
-			update_option( 'wpdo_rl_stats', $rl_stats, false );
 
 			return new WP_REST_Response(
 				array(
@@ -1396,8 +1410,13 @@ class TMDO_REST_API {
 	): WP_REST_Response {
 		global $wpdb;
 
+		// Filters and ordering only on public columns: hidden values must not be
+		// inferable by filtering or sorting on them.
 		$table   = TMDO_Zone_Hot::table( $post_type );
-		$columns = TMDO_Schema_Registry::instance()->get_hot_columns( $post_type );
+		$columns = array_intersect_key(
+			TMDO_Schema_Registry::instance()->get_hot_columns( $post_type ),
+			array_flip( TMDO_Schema_Registry::instance()->get_rest_visible_hot_columns( $post_type ) )
+		);
 
 		// Build WHERE clauses from numeric filter params.
 		$where  = array();
@@ -1443,8 +1462,8 @@ class TMDO_REST_API {
 					'post_type' => $post_type,
 				);
 				unset( $row['post_id'], $row['updated_at'] );
-				// Keep only columns with show_in_rest => true (or all if no registry entry).
-				$row = $visible_cols ? array_intersect_key( $row, $visible_cols ) : $row;
+				// Keep only public columns (none when nothing is declared public).
+				$row = array_intersect_key( $row, $visible_cols );
 				return array_merge( $item, $row );
 			},
 			$rows

includes/class-tmdo-schema-registry.php

@@ -103,7 +103,9 @@ class TMDO_Schema_Registry {
 	 *   - ttl        (int)    TTL in seconds (Zone B only, null = no expiry).
 	 *   - cache_group (string) Object cache group (Zone C only).
 	 *   - cache_ttl   (int)   Cache TTL in seconds (Zone C only).
-	 *   - show_in_rest (bool) Whether to expose via GET /wpdo/v1/listings. Default true.
+	 *   - show_in_rest (bool) Whether to expose via the public GET /wpdo/v1/listings
+	 *                         endpoints. Default false; protected (underscore) keys and
+	 *                         credential-like keys are never exposed (see rest_exposable()).
 	 */
 	public function register( string $provider, array $config ): void {
 		$config = wp_parse_args(
@@ -120,7 +122,7 @@ class TMDO_Schema_Registry {
 				'cache_group'  => '',
 				'cache_ttl'    => HOUR_IN_SECONDS,
 				'provider'     => $provider,
-				'show_in_rest' => true,
+				'show_in_rest' => false,
 			)
 		);
 
@@ -276,6 +278,25 @@ class TMDO_Schema_Registry {
 		return array_unique( $this->cold_fields[ $post_type ] ?? array() );
 	}
 
+	/**
+	 * Whether a field may appear in the public listings endpoints: declared
+	 * show_in_rest, not a protected meta key (leading underscore — WordPress
+	 * hides those from public output, e.g. _purchase_note), and not named like a
+	 * credential (tokens, secrets, passwords, API keys) or a contact / location
+	 * detail (email, phone, address, IP), whatever it declares.
+	 *
+	 * @param array<string, mixed> $field Registered field.
+	 * @return bool
+	 */
+	private static function rest_exposable( array $field ): bool {
+		$key = (string) ( $field['meta_key'] ?? '' );
+		return ! empty( $field['show_in_rest'] )
+			&& 0 !== strpos( $key, '_' )
+			&& 1 !== preg_match( '/token|secret|passw|api_?key|private_?key|credential|salt|nonce/i', $key . ' ' . ( $field['column'] ?? '' ) )
+			// Contact and location details (2.3 PR-096): private even when declared public.
+			&& 1 !== preg_match( '/e_?mail|phone|address|(^|_)ip(_|$|\s)/i', $key . ' ' . ( $field['column'] ?? '' ) );
+	}
+
 	/**
 	 * Returns hot column names for a post type where show_in_rest is true.
 	 * Used by REST endpoints to restrict publicly exposed fields.
@@ -286,7 +307,7 @@ class TMDO_Schema_Registry {
 	public function get_rest_visible_hot_columns( string $post_type ): array {
 		$visible = array();
 		foreach ( $this->fields as $field ) {
-			if ( 'hot' === $field['zone'] && $field['post_type'] === $post_type && ! empty( $field['show_in_rest'] ) ) {
+			if ( 'hot' === $field['zone'] && $field['post_type'] === $post_type && self::rest_exposable( $field ) ) {
 				$visible[] = $field['column'];
 			}
 		}
@@ -303,7 +324,7 @@ class TMDO_Schema_Registry {
 	public function get_rest_visible_cold_keys( string $post_type ): array {
 		$visible = array();
 		foreach ( $this->fields as $field ) {
-			if ( 'cold' === $field['zone'] && $field['post_type'] === $post_type && ! empty( $field['show_in_rest'] ) ) {
+			if ( 'cold' === $field['zone'] && $field['post_type'] === $post_type && self::rest_exposable( $field ) ) {
 				$visible[] = $field['meta_key'];
 			}
 		}

includes/diagnostic/class-tmdo-drift-check.php

@@ -0,0 +1,533 @@
+<?php
+/**
+ * TMDO_Drift_Check — read-only flat-vs-native comparison for every entity type.
+ *
+ * For each backfillable group and key, the flat column is compared with what
+ * native meta would put there (first native row → safe unserialize →
+ * TMDO_Type_Caster::to_db()):
+ *
+ *   miss  — native holds a non-empty value, the flat column is NULL or has no row
+ *   diff  — both hold a value and the values differ (numbers, JSON and
+ *           serialized values are compared by value, not by formatting)
+ *   extra — the flat column holds a value, native has no row for the key
+ *           (a required column holding its default counts as absent); rows of
+ *           another post type or of a deleted entity count too
+ *
+ * run() writes nothing except the per-group outcome in the wpdo_drift_status
+ * option. fix() rebuilds the drifted rows from native (native is never written).
+ *
+ * @package WP_Data_Optimizer
+ * @since   1.2.0
+ */
+
+// phpcs:ignore WPDO.AntiEAV -- drift checker: must read raw meta to compare it with the flat tables
+
+declare(strict_types=1);
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+// phpcs:disable WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching,WordPress.DB.PreparedSQL.InterpolatedNotPrepared,WordPress.DB.PreparedSQL.NotPrepared -- Read-only checker: table and column names come from the registry / adapters, meta keys and ids go through prepare() or intval.
+
+/**
+ * Flat-vs-native drift checker.
+ */
+final class TMDO_Drift_Check {
+
+	/**
+	 * Option holding the last outcome per entity / group.
+	 */
+	public const OPTION = 'wpdo_drift_status';
+
+	/**
+	 * Entities per group sampled by the daily check.
+	 */
+	public const CRON_SAMPLE = 500;
+
+	/**
+	 * Single WP-Cron event rebuilding an entity's flat tables from native after
+	 * writes bypassed them. Argument: the entity type.
+	 */
+	public const RESYNC_HOOK = 'tmdo_drift_resync';
+
+	/**
+	 * Seconds before the scheduled rebuild, so the switch that triggered it
+	 * finishes first.
+	 */
+	private const RESYNC_DELAY = 60;
+
+	/**
+	 * MySQL regex for a plain decimal number, used to skip rows that obviously match.
+	 * Exact matches compare BINARY: meta and flat tables may differ in collation,
+	 * and a case-insensitive one would hide 'b' vs 'B'.
+	 */
+	private const SQL_NUMERIC = '^-?[0-9]+(\\\\.[0-9]+)?$';
+
+	/**
+	 * Compare one entity type's flat tables with native meta.
+	 *
+	 * @param string $entity_type post | user | term | comment.
+	 * @param string $group       One group, or '' for every backfillable group.
+	 * @param int    $sample      0 checks every entity; N checks N random entities per group.
+	 * @return array{entity:string, sample:int, groups:array<string, array{miss:int, diff:int, extra:int, keys:array<string, array{miss:int, diff:int, extra:int}>}>, total:array{miss:int, diff:int, extra:int}}
+	 * @throws InvalidArgumentException Unknown entity type or group.
+	 */
+	public static function run( string $entity_type, string $group = '', int $sample = 0 ): array {
+		list( $adapter, $groups ) = self::resolve( $entity_type, $group );
+
+		$report = array(
+			'entity' => $entity_type,
+			'sample' => $sample,
+			'groups' => array(),
+			'total'  => array(
+				'miss'  => 0,
+				'diff'  => 0,
+				'extra' => 0,
+			),
+		);
+		$status = get_option( self::OPTION, array() );
+		$status = is_array( $status ) ? $status : array();
+
+		foreach ( $groups as $name ) {
+			$table = TMDO_Schema_Manager::get_table_name( $entity_type, $name );
+			if ( ! TMDO_Schema_Manager::table_exists( $table ) ) {
+				continue;
+			}
+			$result = self::check_group( $adapter, $entity_type, $name, $table, $sample );
+			unset( $result['ids'] );
+
+			$report['groups'][ $name ] = $result;
+			foreach ( array( 'miss', 'diff', 'extra' ) as $kind ) {
+				$report['total'][ $kind ] += $result[ $kind ];
+			}
+			$status[ $entity_type ][ $name ] = array(
+				'miss'       => $result['miss'],
+				'diff'       => $result['diff'],
+				'extra'      => $result['extra'],
+				'sample'     => $sample,
+				'checked_at' => gmdate( 'Y-m-d H:i:s' ),
+			);
+		}
+
+		update_option( self::OPTION, $status );
+		return $report;
+	}
+
+	/**
+	 * Every backfillable group of the entity was checked within $max_age
+	 * seconds (sampled or full) and none drifted. No record counts as unclean.
+	 *
+	 * @param string $entity_type Entity type.
+	 * @param int    $max_age     Seconds.
+	 */
+	public static function clean_since( string $entity_type, int $max_age ): bool {
+		$status = get_option( self::OPTION, array() );
+		$status = is_array( $status ) ? ( $status[ $entity_type ] ?? array() ) : array();
+		$groups = TMDO_Entity_Migration_Engine::backfillable_groups( $entity_type );
+		if ( empty( $groups ) ) {
+			return false;
+		}
+		foreach ( $groups as $group ) {
+			$last = $status[ $group ] ?? null;
+			if ( ! is_array( $last )
+				|| (int) ( $last['miss'] ?? 0 ) + (int) ( $last['diff'] ?? 0 ) + (int) ( $last['extra'] ?? 0 ) > 0
+				|| (int) strtotime( ( $last['checked_at'] ?? '' ) . ' UTC' ) < time() - $max_age ) {
+				return false;
+			}
+		}
+		return true;
+	}
+
+	/**
+	 * Daily check (wpdo_daily_health_check): sample every entity type written
+	 * to both native and flat (dual_write, shadow_read). In aeav_only flat is
+	 * the source of truth and native is stale by design, so drift means nothing
+	 * there. The outcome replaces the recorded status, so a group found
+	 * drifting leaves the router at once.
+	 */
+	public static function cron_tick(): void {
+		foreach ( TMDO_Entity_Registry::VALID_ENTITY_TYPES as $entity_type ) {
+			if ( ! TMDO_Mode_Manager::writes_to_flat( $entity_type ) || ! TMDO_Mode_Manager::writes_to_eav( $entity_type ) ) {
+				continue;
+			}
+			try {
+				self::run( $entity_type, '', self::CRON_SAMPLE );
+			} catch ( InvalidArgumentException $e ) {
+				continue; // No adapter for this entity type on this site.
+			}
+		}
+	}
+
+	/**
+	 * Entities to rebuild after a mode change: one whose flat tables were not
+	 * written (disabled) is written next to native again, and values written
+	 * meanwhile are missing from flat.
+	 *
+	 * @param string $entity_type Entity type.
+	 * @param string $new_mode    New mode.
+	 * @param string $old_mode    Previous mode.
+	 * @return string[]
+	 */
+	public static function resync_after_mode_change( string $entity_type, string $new_mode, string $old_mode ): array {
+		$keeps_native = array( TMDO_Mode_Manager::MODE_DUAL_WRITE, TMDO_Mode_Manager::MODE_SHADOW_READ );
+		return TMDO_Mode_Manager::MODE_DISABLED === $old_mode && in_array( $new_mode, $keeps_native, true ) ? array( $entity_type ) : array();
+	}
+
+	/**
+	 * Entities to rebuild after the Hook Bus flag changes: no write reached
+	 * flat while it was off. Every entity written to both native and flat
+	 * (aeav_only keeps flat as the source of truth).
+	 *
+	 * @param mixed $old_value Previous flag value.
+	 * @param mixed $value     New flag value.
+	 * @return string[]
+	 */
+	public static function resync_after_hook_bus_change( $old_value, $value ): array {
+		if ( self::flag_on( $old_value ) || ! self::flag_on( $value ) ) {
+			return array();
+		}
+		$entities = array();
+		foreach ( TMDO_Entity_Registry::VALID_ENTITY_TYPES as $entity_type ) {
+			if ( TMDO_Mode_Manager::writes_to_flat( $entity_type ) && TMDO_Mode_Manager::writes_to_eav( $entity_type ) ) {
+				$entities[] = $entity_type;
+			}
+		}
+		return $entities;
+	}
+
+	/**
+	 * `wpdo_bridge_mode_changed` handler.
+	 *
+	 * @param string $entity_type Entity type.
+	 * @param string $new_mode    New mode.
+	 * @param string $old_mode    Previous mode.
+	 */
+	public static function on_mode_changed( string $entity_type, string $new_mode, string $old_mode ): void {
+		self::schedule_resync( self::resync_after_mode_change( $entity_type, $new_mode, $old_mode ) );
+	}
+
+	/**
+	 * `update_option_wpdo_hook_bus_enabled` handler.
+	 *
+	 * @param mixed $old_value Previous flag value.
+	 * @param mixed $value     New flag value.
+	 */
+	public static function on_hook_bus_toggled( $old_value, $value ): void {
+		self::schedule_resync( self::resync_after_hook_bus_change( $old_value, $value ) );
+	}
+
+	/**
+	 * `add_option_wpdo_hook_bus_enabled` handler: the flag is stored for the first time.
+	 *
+	 * @param string $option Option name.
+	 * @param mixed  $value  Flag value.
+	 */
+	public static function on_hook_bus_added( $option, $value ): void {
+		unset( $option );
+		self::schedule_resync( self::resync_after_hook_bus_change( '0', $value ) );
+	}
+
+	/**
+	 * RESYNC_HOOK handler. An entity that has meanwhile moved to aeav_only is
+	 * left alone (fix() refuses).
+	 *
+	 * @param string $entity_type Entity type.
+	 */
+	public static function run_scheduled_fix( string $entity_type ): void {
+		try {
+			$result = self::fix( $entity_type );
+			TMDO_Schema_Manager::resynced( $entity_type ); // Groups upgraded while deferred use the flat table again.
+			TMDO_Logger::info( 'drift_resync', array( 'entity' => $entity_type ) + $result['fixed'] );
+		} catch ( InvalidArgumentException | RuntimeException $e ) {
+			TMDO_Logger::info(
+				'drift_resync_skipped',
+				array(
+					'entity' => $entity_type,
+					'reason' => $e->getMessage(),
+				)
+			);
+		}
+	}
+
+	/**
+	 * Schedule one rebuild per entity type (not twice while one is pending).
+	 *
+	 * @param string[] $entities Entity types.
+	 */
+	private static function schedule_resync( array $entities ): void {
+		foreach ( $entities as $entity_type ) {
+			if ( ! wp_next_scheduled( self::RESYNC_HOOK, array( $entity_type ) ) ) {
+				wp_schedule_single_event( time() + self::RESYNC_DELAY, self::RESYNC_HOOK, array( $entity_type ) );
+			}
+		}
+	}
+
+	/**
+	 * Whether a stored Hook Bus flag value means "on" (as TMDO_Hook_Bus_Bridge reads it).
+	 *
+	 * @param mixed $value Flag value.
+	 */
+	private static function flag_on( $value ): bool {
+		return '1' === (string) $value || true === $value;
+	}
+
+	/**
+	 * Rebuild drifted flat rows from native meta, then check again.
+	 *
+	 * Rows of deleted entities (or, for post groups, of posts outside the
+	 * group's post types) are deleted. Every other entity with drift in any key
+	 * gets its whole row rebuilt from native; when native holds none of the
+	 * group's keys the row is kept with its columns cleared. Row caches of the
+	 * touched entities are invalidated. Native meta is never written.
+	 *
+	 * @param string $entity_type post | user | term | comment.
+	 * @param string $group       One group, or '' for every backfillable group.
+	 * @return array{fixed:array{rebuilt:int, cleared:int, deleted_rows:int}, after:array<string, mixed>}
+	 * @throws RuntimeException In aeav_only, where flat is the source of truth
+	 *                          (and InvalidArgumentException via resolve() for an
+	 *                          unknown entity type or group).
+	 */
+	public static function fix( string $entity_type, string $group = '' ): array {
+		global $wpdb;
+		list( $adapter, $groups ) = self::resolve( $entity_type, $group );
+		if ( TMDO_Mode_Manager::MODE_AEAV_ONLY === TMDO_Mode_Manager::get( $entity_type ) ) {
+			throw new RuntimeException( esc_html( $entity_type ) . ' is in aeav_only: flat is the source of truth and native meta is stale, so it cannot be rebuilt from native. Write flat back first (wp tmdo bridge-restore-native).' );
+		}
+
+		$id    = $adapter->get_entity_id_column();
+		$fixed = array(
+			'rebuilt'      => 0,
+			'cleared'      => 0,
+			'deleted_rows' => 0,
+		);
+		foreach ( $groups as $name ) {
+			$table = TMDO_Schema_Manager::get_table_name( $entity_type, $name );
+			if ( ! TMDO_Schema_Manager::table_exists( $table ) ) {
+				continue;
+			}
+
+			foreach ( self::stray_ids( $adapter, $entity_type, $name, $table ) as $eid ) {
+				$fixed['deleted_rows'] += (int) $wpdb->delete( $table, array( $id => $eid ), array( '%d' ) );
+				TMDO_Cache_Orchestrator::invalidate( $entity_type, $eid, $name );
+			}
+
+			foreach ( self::check_group( $adapter, $entity_type, $name, $table, 0 )['ids'] as $eid ) {
+				if ( TMDO_Entity_Migration_Engine::migrate_entity( $entity_type, $name, $eid ) ) {
+					++$fixed['rebuilt'];
+				} else {
+					self::clear_row( $entity_type, $name, $table, $id, $eid );
+					++$fixed['cleared'];
+				}
+				TMDO_Cache_Orchestrator::invalidate( $entity_type, $eid, $name );
+			}
+		}
+
+		return array(
+			'fixed' => $fixed,
+			'after' => self::run( $entity_type, $group ),
+		);
+	}
+
+	/**
+	 * Adapter and group list for a run.
+	 *
+	 * @param string $entity_type Entity type.
+	 * @param string $group       One group, or '' for every backfillable group.
+	 * @return array{0:TMDO_Entity_Adapter_Interface, 1:string[]}
+	 * @throws InvalidArgumentException Unknown entity type or group.
+	 */
+	private static function resolve( string $entity_type, string $group ): array {
+		$adapter = TMDO_Entity_Registry::get_adapter( $entity_type );
+		if ( ! $adapter ) {
+			throw new InvalidArgumentException( 'Unknown entity type: ' . esc_html( $entity_type ) );
+		}
+		$groups = TMDO_Entity_Migration_Engine::backfillable_groups( $entity_type );
+		if ( '' !== $group ) {
+			if ( ! in_array( $group, $groups, true ) ) {
+				throw new InvalidArgumentException( 'Unknown or orphan ' . esc_html( $entity_type ) . ' group: ' . esc_html( $group ) );
+			}
+			$groups = array( $group );
+		}
+		return array( $adapter, $groups );
+	}
+
+	/**
+	 * Compare every key of one group.
+	 *
+	 * @param TMDO_Entity_Adapter_Interface $adapter     Entity adapter.
+	 * @param string                        $entity_type Entity type.
+	 * @param string                        $group       Group name.
+	 * @param string                        $table       Group flat table.
+	 * @param int                           $sample      0, or the number of random entities.
+	 * @return array{miss:int, diff:int, extra:int, keys:array<string, array{miss:int, diff:int, extra:int}>, ids:int[]}
+	 */
+	private static function check_group( TMDO_Entity_Adapter_Interface $adapter, string $entity_type, string $group, string $table, int $sample ): array {
+		global $wpdb;
+
+		$meta   = $adapter->get_native_meta_table();
+		$id     = $adapter->get_entity_id_column();
+		$mid    = 'user' === $entity_type ? 'umeta_id' : 'meta_id';
+		$scope  = self::scope_sql( $adapter, $entity_type, $group, $sample );
+		$result = array(
+			'miss'  => 0,
+			'diff'  => 0,
+			'extra' => 0,
+			'keys'  => array(),
+			'ids'   => array(),
+		);
+
+		foreach ( TMDO_Entity_Registry::get_group_fields( $entity_type, $group ) as $field ) {
+			$key  = (string) $field['key'];
+			$col  = TMDO_Schema_Manager::sanitize_column_name( $key );
+			$type = $field['type'] ?? 'text';
+
+			// First native row per entity — what a single get_*_meta() read returns.
+			$native = $wpdb->prepare( "SELECT m.`{$id}` AS eid, m.meta_value AS v FROM `{$meta}` m JOIN ( SELECT `{$id}`, MIN(`{$mid}`) AS mid FROM `{$meta}` WHERE meta_key = %s GROUP BY `{$id}` ) x ON x.mid = m.`{$mid}` WHERE 1=1", $key )
+				. str_replace( '{id}', "m.`{$id}`", $scope );
+
+			// Text beyond the column width is stored as NULL by design (Type_Caster::fit_text).
+			$fits = 'text' === $type ? ' AND CHAR_LENGTH(n.v) <= ' . TMDO_Type_Caster::TEXT_MAX_CHARS : '';
+			$miss = array_map( 'intval', $wpdb->get_col( "SELECT n.eid FROM ( {$native} ) n LEFT JOIN `{$table}` f ON f.`{$id}` = n.eid WHERE LENGTH(n.v) > 0 AND f.`{$col}` IS NULL{$fits}" ) );
+
+			$candidates = $wpdb->get_results(
+				"SELECT n.eid, n.v, f.`{$col}` AS flat FROM ( {$native} ) n JOIN `{$table}` f ON f.`{$id}` = n.eid
+				 WHERE f.`{$col}` IS NOT NULL AND NOT ( BINARY CAST(f.`{$col}` AS CHAR) = BINARY n.v
+				   OR ( n.v REGEXP '" . self::SQL_NUMERIC . "' AND CAST(f.`{$col}` AS DECIMAL(30,6)) = CAST(n.v AS DECIMAL(30,6)) ) )",
+				ARRAY_A
+			);
+			$diff       = array();
+			foreach ( (array) $candidates as $row ) {
+				if ( ! self::same( (string) $row['v'], (string) $row['flat'], $field ) ) {
+					$diff[] = (int) $row['eid'];
+				}
+			}
+
+			$absent = $wpdb->prepare( "NOT EXISTS ( SELECT 1 FROM `{$meta}` m WHERE m.`{$id}` = f.`{$id}` AND m.meta_key = %s )", $key );
+			if ( ! empty( $field['required'] ) ) {
+				$default = (string) TMDO_Type_Caster::to_db( null, $field );
+				$absent .= $wpdb->prepare(
+					" AND NOT ( BINARY CAST(f.`{$col}` AS CHAR) = BINARY %s OR ( %s REGEXP '" . self::SQL_NUMERIC . "' AND CAST(f.`{$col}` AS DECIMAL(30,6)) = CAST(%s AS DECIMAL(30,6)) ) )",
+					$default,
+					$default,
+					$default
+				);
+			}
+			// Every flat row counts, including rows of other post types or deleted
+			// entities; only sample mode narrows the rows.
+			$extra = array_map( 'intval', $wpdb->get_col( "SELECT f.`{$id}` FROM `{$table}` f WHERE f.`{$col}` IS NOT NULL AND {$absent}" . ( $sample > 0 ? str_replace( '{id}', "f.`{$id}`", $scope ) : '' ) ) );
+
+			$counts                 = array(
+				'miss'  => count( $miss ),
+				'diff'  => count( $diff ),
+				'extra' => count( $extra ),
+			);
+			$result['keys'][ $key ] = $counts;
+			$result['miss']        += $counts['miss'];
+			$result['diff']        += $counts['diff'];
+			$result['extra']       += $counts['extra'];
+			$result['ids']          = array_merge( $result['ids'], $miss, $diff, $extra );
+		}
+
+		$result['ids'] = array_values( array_unique( $result['ids'] ) );
+		return $result;
+	}
+
+	/**
+	 * Flat rows whose entity no longer exists or, for post groups, whose post
+	 * is outside the group's post types.
+	 *
+	 * @param TMDO_Entity_Adapter_Interface $adapter     Entity adapter.
+	 * @param string                        $entity_type Entity type.
+	 * @param string                        $group       Group name.
+	 * @param string                        $table       Group flat table.
+	 * @return int[]
+	 */
+	private static function stray_ids( TMDO_Entity_Adapter_Interface $adapter, string $entity_type, string $group, string $table ): array {
+		global $wpdb;
+
+		$id         = $adapter->get_entity_id_column();
+		$primary    = $adapter->get_primary_table();
+		$pk         = $adapter->get_primary_id_column();
+		$post_types = 'post' === $entity_type ? TMDO_Entity_Registry::get_group_post_types( $entity_type, $group ) : array();
+		$type_sql   = $post_types ? " AND p.post_type IN ('" . implode( "','", array_map( 'esc_sql', $post_types ) ) . "')" : '';
+
+		return array_map( 'intval', $wpdb->get_col( "SELECT f.`{$id}` FROM `{$table}` f LEFT JOIN `{$primary}` p ON p.`{$pk}` = f.`{$id}`{$type_sql} WHERE p.`{$pk}` IS NULL" ) );
+	}
+
+	/**
+	 * Clear a row's columns: native holds none of the group's keys. The row is
+	 * kept (NULL-only rows are not deleted, as the router may join on them);
+	 * required columns go back to their default.
+	 *
+	 * @param string $entity_type Entity type.
+	 * @param string $group       Group name.
+	 * @param string $table       Group flat table.
+	 * @param string $id          Entity id column.
+	 * @param int    $eid         Entity id.
+	 */
+	private static function clear_row( string $entity_type, string $group, string $table, string $id, int $eid ): void {
+		global $wpdb;
+
+		$data = array();
+		foreach ( TMDO_Entity_Registry::get_group_fields( $entity_type, $group ) as $field ) {
+			$data[ TMDO_Schema_Manager::sanitize_column_name( (string) $field['key'] ) ] = TMDO_Type_Caster::to_db( null, $field );
+		}
+		$wpdb->update( $table, $data, array( $id => $eid ) );
+	}
+
+	/**
+	 * SQL restricting the checked entities: the group's post types, and in
+	 * sample mode a random set of entity ids. `{id}` stands for the id column.
+	 *
+	 * @param TMDO_Entity_Adapter_Interface $adapter     Entity adapter.
+	 * @param string                        $entity_type Entity type.
+	 * @param string                        $group       Group name.
+	 * @param int                           $sample      0, or the number of random entities.
+	 */
+	private static function scope_sql( TMDO_Entity_Adapter_Interface $adapter, string $entity_type, string $group, int $sample ): string {
+		global $wpdb;
+
+		$post_types = 'post' === $entity_type ? TMDO_Entity_Registry::get_group_post_types( $entity_type, $group ) : array();
+		$type_sql   = $post_types
+			? " post_type IN ('" . implode( "','", array_map( 'esc_sql', $post_types ) ) . "')"
+			: '';
+
+		if ( $sample <= 0 ) {
+			return $type_sql ? " AND {id} IN ( SELECT ID FROM {$wpdb->posts} WHERE{$type_sql} )" : '';
+		}
+
+		$primary = $adapter->get_primary_table();
+		$pk      = $adapter->get_primary_id_column();
+		$ids     = $wpdb->get_col( "SELECT `{$pk}` FROM `{$primary}`" . ( $type_sql ? " WHERE{$type_sql}" : '' ) . ' ORDER BY RAND() LIMIT ' . (int) $sample );
+		return ' AND {id} IN (' . ( $ids ? implode( ',', array_map( 'intval', $ids ) ) : '0' ) . ')';
+	}
+
+	/**
+	 * Whether a flat value is what native meta would store.
+	 *
+	 * @param string               $native Raw native meta_value.
+	 * @param string               $flat   Flat column value.
+	 * @param array<string, mixed> $field  Registered field definition.
+	 */
+	private static function same( string $native, string $flat, array $field ): bool {
+		$type  = $field['type'] ?? 'text';
+		$value = TMDO_Safe_Unserialize::run( $native );
+		if ( 'text' === $type && is_scalar( $value ) && mb_strlen( (string) $value ) > TMDO_Type_Caster::TEXT_MAX_CHARS ) {
+			return false; // Belongs in flat as NULL, yet this row holds a value.
+		}
+
+		$expected = TMDO_Type_Caster::to_db( $value, $field );
+		if ( null === $expected ) {
+			return false;
+		}
+		if ( 'json' === $type ) {
+			// Key order and int-vs-float formatting are not drift.
+			return json_decode( $flat, true ) == json_decode( (string) $expected, true ); // phpcs:ignore Universal.Operators.StrictComparisons.LooseEqual
+		}
+		if ( is_numeric( $expected ) && is_numeric( $flat ) ) {
+			return abs( (float) $expected - (float) $flat ) < 0.000001;
+		}
+		return (string) $expected === $flat;
+	}
+}

includes/diagnostic/class-tmdo-health-cron.php

@@ -104,7 +104,7 @@ class TMDO_Health_Cron {
 				}
 			} catch ( Throwable $e ) {
 				// phpcs:ignore Generic.CodeAnalysis.EmptyStatement.DetectedCatch -- detector failure must not break health check.
-				error_log( '[WPDO] Module detector exception in health cron: ' . $e->getMessage() ); // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_error_log
+				TMDO_Logger::error( 'health_cron', 'module_detector', $e->getMessage() );
 			}
 		}
 

includes/engine/class-tmdo-auto-promoter.php

@@ -6,7 +6,8 @@
  * 判斷條件(皆滿足才觸發):
  *   1. 當前 mode = shadow_read
  *   2. 進入 shadow_read 距今 ≥ `min_days`
- *   3. 進入後 `shadow_diffs` 表中該 entity 的 diff 筆數 = 0
+ *   3. 該 entity 每個群組最近一次 drift-check（2 天內，抽樣或全量）皆無漂移
+ *      （1.2.0 起取代 shadow_diffs 筆數；無紀錄不升級）
  *
  * 這符合「穩定期沒問題就進 production」的安全遷移原則。
  * 若 diff 出現,規則永不觸發;人工介入即可。
@@ -35,6 +36,9 @@ final class TMDO_Auto_Promoter {
 
 	public const CRON_HOOK = 'wpdo_auto_promote_check';
 
+	/** A drift check older than this (seconds) does not count for promotion. */
+	public const DRIFT_MAX_AGE = 2 * DAY_IN_SECONDS;
+
 	public static function init(): void {
 		add_action( self::CRON_HOOK, array( self::class, 'check_all' ) );
 		add_action( 'init', array( self::class, 'maybe_schedule' ), 30 );
@@ -82,7 +86,7 @@ final class TMDO_Auto_Promoter {
 	/**
 	 * 評估單一 entity 是否可升級。
 	 *
-	 * @return string 'promoted' | 'not_shadow_read' | 'not_ready' | 'has_diff' | 'vetoed'
+	 * @return string 'promoted' | 'not_shadow_read' | 'not_ready' | 'drift_not_clean' | 'vetoed' | 'error'
 	 */
 	public static function check_entity( string $type, int $min_days, array $entered_all ): string {
 		$current = TMDO_Mode_Manager::get( $type );
@@ -95,14 +99,13 @@ final class TMDO_Auto_Promoter {
 			return 'not_ready';
 		}
 
-		$diff_counts = TMDO_Shadow_Diff_Logger::count_by_entity();
-		$count       = (int) ( $diff_counts[ $type ] ?? 0 );
-		if ( $count > 0 ) {
-			return 'has_diff';
+		if ( ! TMDO_Drift_Check::clean_since( $type, self::DRIFT_MAX_AGE ) ) {
+			return 'drift_not_clean';
 		}
 
-		// 讓外部 filter 最後一次 veto(例如:還在外部驗證期間)
-		$should = apply_filters( 'wpdo_auto_promote_should_run', true, $type, $entered_at, $count );
+		// 讓外部 filter 最後一次 veto(例如:還在外部驗證期間)。第 4 參數原為
+		// shadow diff 筆數；1.2.0 起改看 drift，固定傳 0。
+		$should = apply_filters( 'wpdo_auto_promote_should_run', true, $type, $entered_at, 0 );
 		if ( ! $should ) {
 			return 'vetoed';
 		}

includes/engine/class-tmdo-entity-migration-engine.php

@@ -144,13 +144,14 @@ final class TMDO_Entity_Migration_Engine {
 					}
 				} catch ( \Throwable $e ) {
 					++$stats['errors'];
-					error_log(
-						sprintf(
-							'[UAE Migration] Error %s/%s ID=%d: %s',
-							$entity_type,
-							$group_name,
-							$entity_id,
-							$e->getMessage()
+					TMDO_Logger::error(
+						'migration_engine',
+						'migrate_group',
+						$e->getMessage(),
+						array(
+							'entity_type' => $entity_type,
+							'group'       => $group_name,
+							'entity_id'   => $entity_id,
 						)
 					);
 				}
@@ -175,6 +176,9 @@ final class TMDO_Entity_Migration_Engine {
 		// 標記完成
 		if ( ! $options['dry_run'] ) {
 			self::mark_migration_completed( $entity_type, $group_name );
+			if ( $stats['migrated'] > 0 ) {
+				self::counts_changed( $entity_type );
+			}
 		}
 
 		$stats['elapsed_sec'] = round( microtime( true ) - $start_time, 2 );
@@ -182,6 +186,45 @@ final class TMDO_Entity_Migration_Engine {
 		return $stats;
 	}
 
+	/**
+	 * Rows rebuilt outside the Hook Bus (backfill, drift-check --fix): routed
+	 * post counts cached for the old rows are stale (2.4 PR-129).
+	 *
+	 * @param string $entity_type Entity type.
+	 * @return void
+	 */
+	private static function counts_changed( string $entity_type ): void {
+		if ( 'post' === $entity_type && class_exists( 'TMDO_Post_Query_Router' ) ) {
+			TMDO_Post_Query_Router::bump_count_version();
+		}
+	}
+
+	/**
+	 * Rebuild one entity's row of a group from native meta.
+	 *
+	 * @return bool False when native holds none of the group's keys (nothing written).
+	 */
+	public static function migrate_entity( string $entity_type, string $group_name, int $entity_id ): bool {
+		$adapter      = TMDO_Entity_Registry::get_adapter( $entity_type );
+		$group_fields = TMDO_Entity_Registry::get_group_fields( $entity_type, $group_name );
+		if ( ! $adapter || empty( $group_fields ) ) {
+			return false;
+		}
+		$migrated = self::migrate_single_entity(
+			$entity_type,
+			$group_name,
+			$entity_id,
+			array_column( $group_fields, 'key' ),
+			array_column( $group_fields, null, 'key' ),
+			$adapter,
+			false
+		);
+		if ( $migrated ) {
+			self::counts_changed( $entity_type );
+		}
+		return $migrated;
+	}
+
 	/**
 	 * 遷移單一 entity 的所有 meta
 	 */
@@ -243,6 +286,27 @@ final class TMDO_Entity_Migration_Engine {
 			return false;
 		}
 
+		// REPLACE rewrites the whole row: a column left out falls back to its DDL
+		// default (e.g. session_count DEFAULT 0), inventing a value the object never
+		// had. Keys without a native row are written as NULL; required columns are
+		// NOT NULL, so they keep their default (treated as "absent" by the diff logger).
+		foreach ( $field_map as $key => $field_def ) {
+			$col = TMDO_Schema_Manager::sanitize_column_name( $key );
+			if ( ! array_key_exists( $col, $data ) && empty( $field_def['required'] ) ) {
+				$data[ $col ] = null;
+				$formats[]    = '%s';
+			}
+		}
+
+		// REPLACE drops columns it is not given: keep a post row's status/date
+		// copies, or one NULL row turns the copy route off for the group (2.4 PR-127).
+		if ( 'post' === $entity_type && class_exists( 'TMDO_Post_Status_Sync' ) ) {
+			foreach ( TMDO_Post_Status_Sync::insert_columns( $entity_id, $group_name ) as $col => $value ) {
+				$data[ $col ] = $value;
+				$formats[]    = '%s';
+			}
+		}
+
 		if ( $dry_run ) {
 			return true;
 		}
@@ -349,13 +413,25 @@ final class TMDO_Entity_Migration_Engine {
 					++$batch_migrated;
 				}
 			} catch ( \Throwable $e ) {
-				error_log( sprintf( '[UAE Migration Batch] Error %s/%s ID=%d: %s', $entity_type, $group_name, $entity_id, $e->getMessage() ) );
+				TMDO_Logger::error(
+					'migration_engine',
+					'migrate_group_batch',
+					$e->getMessage(),
+					array(
+						'entity_type' => $entity_type,
+						'group'       => $group_name,
+						'entity_id'   => $entity_id,
+					)
+				);
 			}
 			$last_id = $entity_id;
 		}
 
 		$total = $prev_total + $batch_migrated;
 		$done  = count( $entity_ids ) < $batch_size;
+		if ( $batch_migrated > 0 ) {
+			self::counts_changed( $entity_type );
+		}
 
 		if ( $done ) {
 			self::mark_migration_completed( $entity_type, $group_name );
@@ -374,6 +450,23 @@ final class TMDO_Entity_Migration_Engine {
 		);
 	}
 
+	/**
+	 * Registered groups of an entity type that can be backfilled from native
+	 * meta. Orphan groups restored from wpdo_registry_meta are left out: their
+	 * values live only in the flat table, a backfill would wipe them.
+	 *
+	 * @return string[]
+	 */
+	public static function backfillable_groups( string $entity_type ): array {
+		$orphans = array();
+		foreach ( TMDO_Entity_Registry::get_restored_groups() as $restored ) {
+			if ( $entity_type === $restored['entity_type'] ) {
+				$orphans[] = $restored['group'];
+			}
+		}
+		return array_values( array_diff( TMDO_Entity_Registry::get_groups_for_type( $entity_type ), $orphans ) );
+	}
+
 	// ─────────────────────────────────────────────────────────
 	// 斷點管理
 	// ─────────────────────────────────────────────────────────

includes/engine/class-tmdo-entity-registry.php

@@ -159,9 +159,12 @@ final class TMDO_Entity_Registry {
 			self::$scopes[ $entity_type ][ $group_name ] = $post_types;
 		}
 		$keys = array_column( $normalized, 'key' );
+		// A sort index may end with the entity ID (flat-first tie-break, 2.4 PR-118).
+		$id_col = (string) self::$adapters[ $entity_type ]->get_entity_id_column();
 		foreach ( (array) ( $args['indexes'] ?? array() ) as $index_name => $columns ) {
 			$columns = array_values( array_map( 'strval', (array) $columns ) );
-			if ( $columns && ! array_diff( $columns, $keys ) ) {
+			$fields  = '' !== $id_col && end( $columns ) === $id_col ? array_slice( $columns, 0, -1 ) : $columns;
+			if ( $fields && ! array_diff( $fields, $keys ) ) {
 				self::$indexes[ $entity_type ][ $group_name ][ (string) $index_name ] = $columns;
 			}
 		}

includes/engine/class-tmdo-hook-bus.php

@@ -44,6 +44,15 @@ final class TMDO_Hook_Bus {
 		// ── 刪除攔截 ──────────────────────────────────────────
 		add_filter( "delete_{$type}_metadata", array( self::class, 'intercept_delete' ), 10, 5 );
 
+		// ── dual_write / shadow_read：原生寫入完成後，flat 從原生同步 ──
+		// Native is the source of truth in these modes; flat follows what
+		// native actually became (WP may skip or refuse a write).
+		add_action( "added_{$type}_meta", array( self::class, 'on_meta_added' ), 1, 4 );
+		add_action( "updated_{$type}_meta", array( self::class, 'on_meta_updated' ), 1, 4 );
+		add_action( "delete_{$type}_meta", array( self::class, 'before_meta_deleted' ), 1, 4 );
+		add_action( "deleted_{$type}_meta", array( self::class, 'on_meta_deleted' ), 1, 4 );
+		add_filter( "update_{$type}_metadata_by_mid", array( self::class, 'before_update_by_mid' ), 1, 4 );
+
 		// ── 實體刪除時自動清理 ───────────────────────────────
 		add_action(
 			$adapter->get_delete_hook(),
@@ -70,13 +79,13 @@ final class TMDO_Hook_Bus {
 	 */
 	public static function intercept_update( $check, $object_id, $meta_key, $meta_value, $prev_value ) {
 
-		// 已在短路中 → 避免遞迴
-		if ( ! empty( self::$internal_ops[ $object_id . ':' . $meta_key ] ) ) {
+		$type = self::resolve_type_from_current_filter();
+		if ( ! $type ) {
 			return $check;
 		}
 
-		$type = self::resolve_type_from_current_filter();
-		if ( ! $type ) {
+		// 已在短路中 → 避免遞迴
+		if ( ! empty( self::$internal_ops[ $type . ':' . $object_id . ':' . $meta_key ] ) ) {
 			return $check;
 		}
 
@@ -86,10 +95,10 @@ final class TMDO_Hook_Bus {
 		}
 
 		// ── Mode-aware dispatch ──────────────────────────────
-		// disabled  : 完全放行給 WP 原生 meta(回 null / $check)
-		// dual_write: 寫 flat,然後 return null 讓 WP 繼續寫 EAV
-		// shadow_read: 寫 flat,然後 return null 讓 WP 繼續寫 EAV
-		// aeav_only : 寫 flat,return true 短路 WP(不寫 EAV)
+		// disabled   : 完全放行給 WP 原生 meta(回 null / $check)
+		// dual_write : 放行 WP 寫 EAV;updated_/added_ action 再從原生同步 flat
+		// shadow_read: 同 dual_write
+		// aeav_only  : 寫 flat,return true 短路 WP(不寫 EAV)
 		if ( ! TMDO_Mode_Manager::writes_to_flat( $type ) ) {
 			return $check;  // disabled
 		}
@@ -105,6 +114,13 @@ final class TMDO_Hook_Bus {
 			return true;
 		}
 
+		// dual_write / shadow_read: native first. Writing flat here, before WP
+		// decides whether native changes at all (same value, non-matching
+		// prev_value), let flat drift; sync_from_native() runs after the write.
+		if ( TMDO_Mode_Manager::writes_to_eav( $type ) ) {
+			return null;
+		}
+
 		// 截取 before value(v1.3.1):audit_logger 等訂閱者需要變更前的值。
 		// v1.3.2:透過 filter `wpdo_capture_before_value` 可關閉以省一次 DB read。
 		$before_value = self::maybe_read_before_value( $type, (int) $object_id, $meta_key, $field_def, 'update' );
@@ -113,23 +129,18 @@ final class TMDO_Hook_Bus {
 
 		do_action( 'wpdo_after_write', $type, (int) $object_id, $meta_key, $meta_value, $flat_result, 'update', $before_value );
 
-		// 若 mode 也要寫 EAV → return null 讓 WP 繼續
-		if ( TMDO_Mode_Manager::writes_to_eav( $type ) ) {
-			return null;  // dual_write / shadow_read
-		}
-
 		return $flat_result;  // aeav_only
 	}
 
 	public static function intercept_add( $check, $object_id, $meta_key, $meta_value, $unique ) {
 
-		// 已在短路中 → 避免遞迴
-		if ( ! empty( self::$internal_ops[ $object_id . ':' . $meta_key ] ) ) {
+		$type = self::resolve_type_from_current_filter();
+		if ( ! $type ) {
 			return $check;
 		}
 
-		$type = self::resolve_type_from_current_filter();
-		if ( ! $type ) {
+		// 已在短路中 → 避免遞迴
+		if ( ! empty( self::$internal_ops[ $type . ':' . $object_id . ':' . $meta_key ] ) ) {
 			return $check;
 		}
 
@@ -150,6 +161,12 @@ final class TMDO_Hook_Bus {
 			return true;
 		}
 
+		// dual_write / shadow_read: native first (add($unique) may be refused);
+		// sync_from_native() runs on added_{type}_meta.
+		if ( TMDO_Mode_Manager::writes_to_eav( $type ) ) {
+			return null;
+		}
+
 		// UAE 的設計:每個 entity 只有 1 row,所以 add 與 update 等效(Upsert)。
 		// 截取 before value(v1.3.1):add 情境下多半為 null,但若 row 已存在而 user 呼叫 add 也能抓到舊值。
 		$before_value = self::maybe_read_before_value( $type, (int) $object_id, $meta_key, $field_def, 'add' );
@@ -158,11 +175,228 @@ final class TMDO_Hook_Bus {
 
 		do_action( 'wpdo_after_write', $type, (int) $object_id, $meta_key, $meta_value, $flat_result, 'add', $before_value );
 
-		if ( TMDO_Mode_Manager::writes_to_eav( $type ) ) {
-			return null;
+		return $flat_result;
+	}
+
+	// ─────────────────────────────────────────────────────────
+	// dual_write / shadow_read：原生寫入後同步 flat
+	// ─────────────────────────────────────────────────────────
+
+	/**
+	 * Entity IDs whose native rows a pending delete removes, keyed "type:key".
+	 *
+	 * @var array<string, int[]>
+	 */
+	private static array $pending_deletes = array();
+
+	/**
+	 * Old keys of rows renamed through update_metadata_by_mid, keyed by meta ID.
+	 *
+	 * @var array<string, array{type:string, id:int, key:string}>
+	 */
+	private static array $pending_renames = array();
+
+	/**
+	 * Copy the entity's current native value for a key into its flat column
+	 * (NULL when native has no row). Runs in dual_write / shadow_read only,
+	 * after WP wrote native, so flat always ends up equal to native — also
+	 * when WP skipped or refused the write, and when an earlier direct SQL
+	 * write had left flat stale. A NULL never creates a row: deleting an
+	 * entity drops its flat row before WP deletes the meta rows one by one.
+	 *
+	 * @param string $type       Entity type.
+	 * @param int    $object_id  Entity ID.
+	 * @param string $meta_key   Meta key.
+	 * @param mixed  $meta_value Value the caller wrote (for listeners).
+	 * @param string $op         'add' | 'update' | 'delete'.
+	 * @param bool   $delete_all Whether the delete was a delete_all.
+	 * @return void
+	 */
+	public static function sync_from_native( string $type, int $object_id, string $meta_key, $meta_value, string $op, bool $delete_all = false ): void {
+		if ( ! TMDO_Mode_Manager::writes_to_flat( $type ) || ! TMDO_Mode_Manager::writes_to_eav( $type ) ) {
+			return;
+		}
+		$field_def = self::field_for( $type, $object_id, $meta_key );
+		if ( ! $field_def || 'flat' !== self::decide_route( $op, $type, $object_id, $meta_key, $meta_value ) ) {
+			return;
 		}
 
-		return $flat_result;
+		$before = self::maybe_read_before_value( $type, $object_id, $meta_key, $field_def, $op );
+		$native = self::native_first_value( $type, $object_id, $meta_key );
+		$result = null === $native
+			? self::clear_column( $type, $object_id, $meta_key, $field_def )
+			: self::perform_upsert( $type, $object_id, $meta_key, maybe_unserialize( $native ), $field_def );
+
+		if ( 'delete' === $op ) {
+			do_action( 'wpdo_after_delete', $type, $object_id, $meta_key, $meta_value, $result, $delete_all, $before );
+		} else {
+			do_action( 'wpdo_after_write', $type, $object_id, $meta_key, $meta_value, $result, $op, $before );
+		}
+	}
+
+	/**
+	 * `added_{type}_meta` action.
+	 *
+	 * @param int    $meta_id    Meta ID.
+	 * @param int    $object_id  Entity ID.
+	 * @param string $meta_key   Meta key.
+	 * @param mixed  $meta_value Meta value.
+	 */
+	public static function on_meta_added( $meta_id, $object_id, $meta_key, $meta_value ): void {
+		$type = self::resolve_type_from_meta_hook();
+		if ( $type ) {
+			self::sync_from_native( $type, (int) $object_id, (string) $meta_key, $meta_value, 'add' );
+		}
+	}
+
+	/**
+	 * `updated_{type}_meta` action; also re-syncs the old key of a row renamed
+	 * through update_metadata_by_mid.
+	 *
+	 * @param int    $meta_id    Meta ID.
+	 * @param int    $object_id  Entity ID.
+	 * @param string $meta_key   Meta key.
+	 * @param mixed  $meta_value Meta value.
+	 */
+	public static function on_meta_updated( $meta_id, $object_id, $meta_key, $meta_value ): void {
+		$type = self::resolve_type_from_meta_hook();
+		if ( ! $type ) {
+			return;
+		}
+		self::sync_from_native( $type, (int) $object_id, (string) $meta_key, $meta_value, 'update' );
+
+		$rename_key = $type . ':' . (int) $meta_id;
+		if ( isset( self::$pending_renames[ $rename_key ] ) ) {
+			$old = self::$pending_renames[ $rename_key ];
+			unset( self::$pending_renames[ $rename_key ] );
+			self::sync_from_native( $type, $old['id'], $old['key'], null, 'delete' );
+		}
+	}
+
+	/**
+	 * `update_{type}_metadata_by_mid` filter: remember the old key when a row
+	 * is renamed, so its flat column can follow. Never changes $check.
+	 *
+	 * @param mixed        $check      Short-circuit value.
+	 * @param int          $meta_id    Meta ID.
+	 * @param mixed        $meta_value New value.
+	 * @param string|false $meta_key   New key, or false to keep it.
+	 * @return mixed
+	 */
+	public static function before_update_by_mid( $check, $meta_id, $meta_value, $meta_key ) {
+		$type = self::resolve_type_from_meta_hook();
+		if ( ! $type || false === $meta_key ) {
+			return $check;
+		}
+		$row = self::native_row_by_mid( $type, (int) $meta_id );
+		if ( $row && $row['key'] !== $meta_key && TMDO_Entity_Registry::get_field( $type, $row['key'] ) ) {
+			self::$pending_renames[ $type . ':' . (int) $meta_id ] = array(
+				'type' => $type,
+				'id'   => $row['id'],
+				'key'  => $row['key'],
+			);
+		}
+		return $check;
+	}
+
+	/**
+	 * `delete_{type}_meta` action (rows still exist): record which entities a
+	 * delete touches — a delete_all passes object ID 0.
+	 *
+	 * @param int[]  $meta_ids   Meta IDs to delete.
+	 * @param int    $object_id  Entity ID (0 for delete_all).
+	 * @param string $meta_key   Meta key.
+	 * @param mixed  $meta_value Meta value.
+	 */
+	public static function before_meta_deleted( $meta_ids, $object_id, $meta_key, $meta_value ): void {
+		$type = self::resolve_type_from_meta_hook();
+		if ( ! $type || ! TMDO_Entity_Registry::get_field( $type, (string) $meta_key ) || ! TMDO_Mode_Manager::writes_to_eav( $type ) ) {
+			return;
+		}
+		$ids = array();
+		foreach ( (array) $meta_ids as $mid ) {
+			$row = self::native_row_by_mid( $type, (int) $mid );
+			if ( $row ) {
+				$ids[ $row['id'] ] = $row['id'];
+			}
+		}
+		self::$pending_deletes[ $type . ':' . $meta_key ] = array_values( $ids );
+	}
+
+	/**
+	 * `deleted_{type}_meta` action: re-sync every entity the delete touched.
+	 *
+	 * @param int[]  $meta_ids   Deleted meta IDs.
+	 * @param int    $object_id  Entity ID (0 for delete_all).
+	 * @param string $meta_key   Meta key.
+	 * @param mixed  $meta_value Meta value.
+	 */
+	public static function on_meta_deleted( $meta_ids, $object_id, $meta_key, $meta_value ): void {
+		$type = self::resolve_type_from_meta_hook();
+		if ( ! $type ) {
+			return;
+		}
+		$pending_key = $type . ':' . $meta_key;
+		$ids         = self::$pending_deletes[ $pending_key ] ?? array( (int) $object_id );
+		unset( self::$pending_deletes[ $pending_key ] );
+
+		foreach ( $ids as $id ) {
+			if ( $id > 0 ) {
+				self::sync_from_native( $type, (int) $id, (string) $meta_key, $meta_value, 'delete', 0 === (int) $object_id );
+			}
+		}
+	}
+
+	/**
+	 * First native value of a key (the one get_*_meta( $id, $key, true ) returns),
+	 * read with SQL so no meta filter runs. Null when the entity has no row.
+	 *
+	 * @param string $type      Entity type.
+	 * @param int    $object_id Entity ID.
+	 * @param string $meta_key  Meta key.
+	 * @return string|null
+	 */
+	private static function native_first_value( string $type, int $object_id, string $meta_key ): ?string {
+		global $wpdb;
+		$adapter = TMDO_Entity_Registry::get_adapter( $type );
+		if ( ! $adapter ) {
+			return null;
+		}
+		$table  = $adapter->get_native_meta_table();
+		$id_col = $adapter->get_entity_id_column();
+		$pk     = 'user' === $type ? 'umeta_id' : 'meta_id';
+		// get_results(): get_var() turns an empty string into null.
+		$rows = $wpdb->get_results(
+			$wpdb->prepare( "SELECT meta_value FROM `{$table}` WHERE `{$id_col}` = %d AND meta_key = %s ORDER BY `{$pk}` LIMIT 1", $object_id, $meta_key ),
+			ARRAY_A
+		);
+		return $rows ? (string) $rows[0]['meta_value'] : null;
+	}
+
+	/**
+	 * Entity ID and key of a native meta row.
+	 *
+	 * @param string $type    Entity type.
+	 * @param int    $meta_id Meta ID.
+	 * @return array{id:int, key:string}|null
+	 */
+	private static function native_row_by_mid( string $type, int $meta_id ): ?array {
+		global $wpdb;
+		$adapter = TMDO_Entity_Registry::get_adapter( $type );
+		if ( ! $adapter ) {
+			return null;
+		}
+		$table  = $adapter->get_native_meta_table();
+		$id_col = $adapter->get_entity_id_column();
+		$pk     = 'user' === $type ? 'umeta_id' : 'meta_id';
+		$row    = $wpdb->get_row( $wpdb->prepare( "SELECT `{$id_col}` AS id, meta_key AS mkey FROM `{$table}` WHERE `{$pk}` = %d", $meta_id ), ARRAY_A );
+		if ( ! $row ) {
+			return null;
+		}
+		return array(
+			'id'  => (int) $row['id'],
+			'key' => (string) $row['mkey'],
+		);
 	}
 
 	/**
@@ -291,6 +525,34 @@ final class TMDO_Hook_Bus {
 		return 'flat';
 	}
 
+	/**
+	 * Set a flat column to NULL on the entity's existing row; never insert one.
+	 *
+	 * @param string               $type      Entity type.
+	 * @param int                  $entity_id Entity ID.
+	 * @param string               $meta_key  Meta key.
+	 * @param array<string, mixed> $field_def Registered field.
+	 * @return bool|null Null when there is no adapter or table.
+	 */
+	private static function clear_column( string $type, int $entity_id, string $meta_key, array $field_def ): ?bool {
+		global $wpdb;
+
+		$adapter = TMDO_Entity_Registry::get_adapter( $type );
+		$table   = TMDO_Schema_Manager::get_table_name( $type, $field_def['group'] );
+		if ( ! $adapter || ! TMDO_Schema_Manager::table_exists( $table ) ) {
+			return null;
+		}
+
+		$col = TMDO_Schema_Manager::sanitize_column_name( $meta_key );
+		// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching
+		$result = $wpdb->update( $table, array( $col => null ), array( $adapter->get_entity_id_column() => $entity_id ) );
+
+		TMDO_Cache_Orchestrator::invalidate( $type, $entity_id, $field_def['group'] );
+		self::touch_posts_last_changed( $type );
+
+		return false !== $result;
+	}
+
 	/**
 	 * 執行 Upsert 操作
 	 */
@@ -322,8 +584,8 @@ final class TMDO_Hook_Bus {
 		$db_value = TMDO_Type_Caster::to_db( $meta_value, $field_def );
 		$format   = TMDO_Type_Caster::get_wpdb_format( $field_def['type'] );
 
-		// 鎖防遞迴
-		$lock_key                        = $entity_id . ':' . $meta_key;
+		// 鎖防遞迴（含 entity type：user 5 與 post 5 不可互鎖）
+		$lock_key                        = $type . ':' . $entity_id . ':' . $meta_key;
 		self::$internal_ops[ $lock_key ] = true;
 
 		try {
@@ -388,12 +650,20 @@ final class TMDO_Hook_Bus {
 		// ── Mode-aware dispatch ──────────────────────────────
 		// disabled    : 完全不攔截,回傳 $check 讓 WP 走原生 EAV
 		// dual_write  : 讀取仍走 EAV(flat 可能還沒有資料),回傳 $check
-		// shadow_read : 讀取走 UAE flat,同時與 EAV 比對記錄 diff
+		// shadow_read : 讀取仍走 EAV,抽樣與 flat 比對記錄 diff
 		// aeav_only   : 讀取走 UAE flat,不讀 EAV
 		if ( ! TMDO_Mode_Manager::reads_from_flat( $type ) ) {
 			return $check;  // disabled / dual_write
 		}
 
+		// shadow_read serves native: update_metadata() reads the old value
+		// through this filter, and serving the just-upserted flat value made
+		// WP see old === new and skip the native write (dev36, 2026-09-26).
+		if ( TMDO_Mode_Manager::does_shadow_compare( $type ) ) {
+			self::maybe_shadow_compare( $type, (int) $object_id, $meta_key, $field_def );
+			return $check;
+		}
+
 		$group = $field_def['group'];
 		$row   = self::get_or_load_row( $type, (int) $object_id, $group );
 
@@ -401,22 +671,6 @@ final class TMDO_Hook_Bus {
 		$has_value = is_array( $row ) && array_key_exists( $col, $row );
 		$value     = $has_value ? TMDO_Type_Caster::from_db( $row[ $col ], $field_def ) : null;
 
-		// Shadow-read:與 EAV 比對,記錄差異
-		if ( TMDO_Mode_Manager::does_shadow_compare( $type ) ) {
-			try {
-				TMDO_Shadow_Diff_Logger::compare_and_log(
-					$type,
-					(int) $object_id,
-					$meta_key,
-					$value,
-					$field_def
-				);
-			} catch ( \Throwable $e ) {
-				// 比對失敗不該影響讀取
-				TMDO_Logger::error( 'entity_bridge', 'shadow_compare_exception', $e->getMessage() );
-			}
-		}
-
 		// 值為空 → 回 WP 原生慣例
 		if ( empty( $row ) || $value === null || $value === '' ) {
 			return $single ? '' : array();
@@ -426,6 +680,36 @@ final class TMDO_Hook_Bus {
 		return $single ? array( $value ) : array( $value );
 	}
 
+	/**
+	 * shadow_read: compare the flat value with native meta for a sample of reads.
+	 *
+	 * Each compare costs a flat row read and a native SQL read, so only a share
+	 * of reads is checked (filter `tmdo_shadow_compare_sample_rate`, 0..1,
+	 * default 0.1). The logger rate-limits repeated diffs itself.
+	 *
+	 * @param string               $type      Entity type.
+	 * @param int                  $object_id Entity ID.
+	 * @param string               $meta_key  Meta key.
+	 * @param array<string, mixed> $field_def Field definition.
+	 */
+	private static function maybe_shadow_compare( string $type, int $object_id, string $meta_key, array $field_def ): void {
+		$rate = (float) apply_filters( 'tmdo_shadow_compare_sample_rate', 0.1, $type, $meta_key );
+		if ( $rate <= 0 || ( $rate < 1 && wp_rand( 1, 1000 ) > $rate * 1000 ) ) {
+			return;
+		}
+
+		$row   = self::get_or_load_row( $type, $object_id, $field_def['group'] );
+		$col   = TMDO_Schema_Manager::sanitize_column_name( $meta_key );
+		$value = array_key_exists( $col, $row ) ? TMDO_Type_Caster::from_db( $row[ $col ], $field_def ) : null;
+
+		try {
+			TMDO_Shadow_Diff_Logger::compare_and_log( $type, $object_id, $meta_key, $value, $field_def );
+		} catch ( \Throwable $e ) {
+			// 比對失敗不該影響讀取
+			TMDO_Logger::error( 'entity_bridge', 'shadow_compare_exception', $e->getMessage() );
+		}
+	}
+
 	/**
 	 * 取得（或載入）完整列資料，並快取
 	 */
@@ -495,6 +779,12 @@ final class TMDO_Hook_Bus {
 			return true;
 		}
 
+		// dual_write / shadow_read: WP deletes native (also delete_all);
+		// deleted_{type}_meta re-syncs every touched entity from native.
+		if ( TMDO_Mode_Manager::writes_to_eav( $type ) ) {
+			return null;
+		}
+
 		// 截取 before value(v1.3.1)
 		$before_value = self::maybe_read_before_value( $type, (int) $object_id, $meta_key, $field_def, 'delete' );
 
@@ -579,12 +869,7 @@ final class TMDO_Hook_Bus {
 
 		do_action( 'wpdo_after_delete', $type, (int) $object_id, $meta_key, $meta_value, $result, (bool) $delete_all, $before_value );
 
-		// 若還要寫 EAV → return null 讓 WP 繼續刪除原生 meta
-		if ( TMDO_Mode_Manager::writes_to_eav( $type ) ) {
-			return null;
-		}
-
-		return $result !== false;
+		return $result !== false;  // aeav_only
 	}
 
 	// ─────────────────────────────────────────────────────────
@@ -627,6 +912,7 @@ final class TMDO_Hook_Bus {
 	private static function touch_posts_last_changed( string $type ): void {
 		if ( 'post' === $type ) {
 			wp_cache_set_posts_last_changed();
+			TMDO_Post_Query_Router::bump_count_version();
 		}
 	}
 
@@ -644,6 +930,17 @@ final class TMDO_Hook_Bus {
 		return null;
 	}
 
+	/**
+	 * Entity type from the meta action / by-mid filter being run
+	 * (added_user_meta, deleted_post_meta, update_term_metadata_by_mid, …).
+	 */
+	private static function resolve_type_from_meta_hook(): ?string {
+		if ( preg_match( '/^(?:(?:added|updated|delete|deleted)_(post|user|term|comment)_meta|update_(post|user|term|comment)_metadata_by_mid)$/', current_filter(), $matches ) ) {
+			return '' !== $matches[1] ? $matches[1] : $matches[2];
+		}
+		return null;
+	}
+
 	/**
 	 * 欄位定義查詢；post meta 依該 post 本身的 post_type 解析（見 TMDO_Entity_Registry::get_field()）。
 	 *
@@ -652,10 +949,23 @@ final class TMDO_Hook_Bus {
 	 */
 	private static function field_for( string $type, int $object_id, string $meta_key ): ?array {
 		$field_def = TMDO_Entity_Registry::get_field( $type, $meta_key );
-		if ( null === $field_def || 'post' !== $type ) {
-			return $field_def;
+		if ( null !== $field_def && 'post' === $type ) {
+			$field_def = TMDO_Entity_Registry::get_field( $type, $meta_key, (string) get_post_type( $object_id ) );
 		}
-		return TMDO_Entity_Registry::get_field( $type, $meta_key, (string) get_post_type( $object_id ) );
+		// A group whose table upgrade waits for WP-CLI / WP-Cron stays native
+		// (not in aeav_only, where native is stale; the router agrees).
+		return null !== $field_def && self::deferred( $type, (string) $field_def['group'] ) ? null : $field_def;
+	}
+
+	/**
+	 * Whether a group is deferred and so read and written natively.
+	 *
+	 * @param string $type  Entity type.
+	 * @param string $group Group name.
+	 * @return bool
+	 */
+	private static function deferred( string $type, string $group ): bool {
+		return TMDO_Schema_Manager::is_deferred( $type, $group ) && TMDO_Mode_Manager::MODE_AEAV_ONLY !== TMDO_Mode_Manager::get( $type );
 	}
 
 	/**
@@ -673,10 +983,13 @@ final class TMDO_Hook_Bus {
 			// 回傳所有群組的所有欄位
 			$result = array();
 			foreach ( TMDO_Entity_Registry::get_groups_for_type( $type ) as $group ) {
-				$row = self::get_or_load_row( $type, $entity_id, $group );
+				$deferred = self::deferred( $type, $group );
+				$row      = $deferred ? array() : self::get_or_load_row( $type, $entity_id, $group );
 				foreach ( TMDO_Entity_Registry::get_group_fields( $type, $group ) as $field ) {
 					$col                     = TMDO_Schema_Manager::sanitize_column_name( $field['key'] );
-					$result[ $field['key'] ] = TMDO_Type_Caster::from_db( $row[ $col ] ?? null, $field );
+					$result[ $field['key'] ] = $deferred
+						? get_metadata( $type, $entity_id, $field['key'], true )
+						: TMDO_Type_Caster::from_db( $row[ $col ] ?? null, $field );
 				}
 			}
 			return $result;
@@ -684,7 +997,8 @@ final class TMDO_Hook_Bus {
 
 		$field_def = self::field_for( $type, $entity_id, $key );
 		if ( ! $field_def ) {
-			return null;
+			// A deferred group's value is the native one.
+			return null !== TMDO_Entity_Registry::get_field( $type, $key ) ? get_metadata( $type, $entity_id, $key, true ) : null;
 		}
 
 		$row = self::get_or_load_row( $type, $entity_id, $field_def['group'] );

includes/engine/class-tmdo-mode-manager.php

@@ -140,6 +140,11 @@ final class TMDO_Mode_Manager {
 			);
 		}
 
+		$guarded = TMDO_Promotion_Guard::check_promotion( $entity_type, $new_mode );
+		if ( $guarded ) {
+			return $guarded;
+		}
+
 		$all                 = self::all();
 		$all[ $entity_type ] = $new_mode;
 
@@ -154,7 +159,7 @@ final class TMDO_Mode_Manager {
 		$entered[ $entity_type ] = time();
 		update_option( self::OPT_ENTERED_AT, $entered, false );
 
-		TMDO_Logger::info(
+		TMDO_Logger::notice(
 			'bridge_mode_changed',
 			array(
 				'entity_type' => $entity_type,

includes/engine/class-tmdo-post-status-sync.php

@@ -29,7 +29,10 @@ final class TMDO_Post_Status_Sync {
 
 	public const OPTION = 'tmdo_post_status_columns';
 
-	private const INDEX = 'idx_post_status_date';
+	private const INDEX = 'idx_post_status_date_id';
+
+	/** The 2.2–2.3 (post_status, post_date) index, replaced by INDEX. */
+	private const LEGACY_INDEX = 'idx_post_status_date';
 
 	/**
 	 * Hook the sync into WordPress.
@@ -65,6 +68,10 @@ final class TMDO_Post_Status_Sync {
 		unset( $new_status, $old_status );
 		foreach ( self::groups_with_columns() as $group ) {
 			$table = TMDO_Schema_Manager::get_table_name( 'post', $group );
+			if ( ! TMDO_Schema_Manager::table_exists( $table ) ) {
+				self::forget( $group ); // The table was dropped (retired or uninstalled group).
+				continue;
+			}
 			$wpdb->query(
 				$wpdb->prepare(
 					"UPDATE `{$table}` SET `post_status` = %s, `post_date` = %s WHERE `post_id` = %d", // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared -- Registry table name.
@@ -199,7 +206,12 @@ final class TMDO_Post_Status_Sync {
 			$changes[] = 'ADD COLUMN `post_date` DATETIME DEFAULT NULL';
 		}
 		if ( ! in_array( self::INDEX, $indexes, true ) ) {
-			$changes[] = 'ADD INDEX `' . self::INDEX . '` (`post_status`, `post_date`)';
+			// Ends with post_id: the router reads the date route's ID tie-break
+			// from it, so MySQL walks the index and stops at the LIMIT (2.4 PR-128).
+			$changes[] = 'ADD INDEX `' . self::INDEX . '` (`post_status`, `post_date`, `post_id`)';
+		}
+		if ( in_array( self::LEGACY_INDEX, $indexes, true ) ) {
+			$changes[] = 'DROP INDEX `' . self::LEGACY_INDEX . '`';
 		}
 		if ( $changes && false === $wpdb->query( "ALTER TABLE `{$table}` " . implode( ', ', $changes ) ) ) { // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared -- Fixed DDL on a registry table name.
 			return false;
@@ -220,6 +232,20 @@ final class TMDO_Post_Status_Sync {
 		return is_array( $states ) ? array_keys( $states ) : array();
 	}
 
+	/**
+	 * Drop a group from the recorded states.
+	 *
+	 * @param string $group Group name.
+	 * @return void
+	 */
+	private static function forget( string $group ): void {
+		$states = get_option( self::OPTION, array() );
+		if ( is_array( $states ) && isset( $states[ $group ] ) ) {
+			unset( $states[ $group ] );
+			update_option( self::OPTION, $states, true );
+		}
+	}
+
 	/**
 	 * Record a group's state.
 	 *

includes/engine/class-tmdo-promotion-guard.php

@@ -0,0 +1,140 @@
+<?php
+/**
+ * TMDO_Promotion_Guard — keeps native meta authoritative on HivePress /
+ * WooCommerce sites (ADR-004 "search-index mode").
+ *
+ * Both plugins read native meta without going through a keyed
+ * get_*_meta() call: HivePress models load every key with get_*_meta( $id ),
+ * WooCommerce does the same for products and writes stock / sales with direct
+ * SQL. The Hook Bus cannot serve those reads from flat tables, so on these
+ * sites an entity must never reach aeav_only and native rows must never be
+ * cleaned up. Demotion always stays open.
+ *
+ * @package WP_Data_Optimizer
+ */
+
+declare(strict_types=1);
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+/**
+ * Refuses aeav_only promotion and native-meta cleanup where an integration
+ * reads native meta directly.
+ */
+final class TMDO_Promotion_Guard {
+
+	/**
+	 * Entity types each integration reads natively.
+	 *
+	 * HivePress models (Post, User, Term, Comment) all load meta with an empty
+	 * key; WooCommerce does so for products and customers.
+	 */
+	private const GUARDED = array(
+		'HivePress'   => array( 'post', 'user', 'term', 'comment' ),
+		'WooCommerce' => array( 'post', 'user' ),
+	);
+
+	/**
+	 * Check a mode change. Only promotion to aeav_only is guarded.
+	 *
+	 * @param string $entity_type Entity type.
+	 * @param string $new_mode    Target mode.
+	 * @return WP_Error|null Error when refused.
+	 */
+	public static function check_promotion( string $entity_type, string $new_mode ): ?WP_Error {
+		if ( TMDO_Mode_Manager::MODE_AEAV_ONLY !== $new_mode ) {
+			return null;
+		}
+		return self::refuse( $entity_type, TMDO_Mode_Manager::MODE_AEAV_ONLY );
+	}
+
+	/**
+	 * Check a cleanup of the entity's native managed meta rows.
+	 *
+	 * @param string $entity_type Entity type.
+	 * @return WP_Error|null Error when refused.
+	 */
+	public static function check_cleanup( string $entity_type ): ?WP_Error {
+		return self::refuse( $entity_type, 'cleanup' );
+	}
+
+	/**
+	 * Guarded entity types that are already in aeav_only (promoted before the
+	 * guard existed). Native meta may be stale there.
+	 *
+	 * @return array<string, string[]> Entity type → integration names.
+	 */
+	public static function violations(): array {
+		$out = array();
+		foreach ( TMDO_Mode_Manager::all() as $type => $mode ) {
+			if ( TMDO_Mode_Manager::MODE_AEAV_ONLY !== $mode ) {
+				continue;
+			}
+			$integrations = self::integrations_for( $type );
+			if ( ! empty( $integrations ) ) {
+				$out[ $type ] = $integrations;
+			}
+		}
+		return $out;
+	}
+
+	/**
+	 * Active integrations that read this entity type natively.
+	 *
+	 * @param string $entity_type Entity type.
+	 * @return string[]
+	 */
+	private static function integrations_for( string $entity_type ): array {
+		$active = array(
+			'HivePress'   => TMDO_Compatibility::is_hivepress_active(),
+			'WooCommerce' => TMDO_Compatibility::is_woocommerce_active(),
+		);
+
+		$names = array();
+		foreach ( self::GUARDED as $name => $types ) {
+			if ( $active[ $name ] && in_array( $entity_type, $types, true ) ) {
+				$names[] = $name;
+			}
+		}
+		return $names;
+	}
+
+	/**
+	 * Build the refusal, unless no integration applies or a filter allows it.
+	 *
+	 * @param string $entity_type Entity type.
+	 * @param string $action      'aeav_only' or 'cleanup'.
+	 * @return WP_Error|null
+	 */
+	private static function refuse( string $entity_type, string $action ): ?WP_Error {
+		$integrations = self::integrations_for( $entity_type );
+		if ( empty( $integrations ) ) {
+			return null;
+		}
+
+		/**
+		 * Allow a guarded aeav_only promotion or cleanup anyway.
+		 *
+		 * @param bool     $allow        Default false.
+		 * @param string   $entity_type  Entity type.
+		 * @param string   $action       'aeav_only' or 'cleanup'.
+		 * @param string[] $integrations Integrations that read this entity natively.
+		 */
+		if ( apply_filters( 'tmdo_promotion_guard_allow', false, $entity_type, $action, $integrations ) ) {
+			return null;
+		}
+
+		return new WP_Error(
+			'promotion_guarded',
+			sprintf(
+				/* translators: 1: integration names, 2: entity type, 3: aeav_only or cleanup */
+				__( '%1$s 直接讀取原生 meta，%2$s 不能執行 %3$s：這類站台以原生 meta 為唯一資料來源（搜尋索引模式）。', '2meet-data-optimizer' ),
+				implode( ' / ', $integrations ),
+				$entity_type,
+				$action
+			)
+		);
+	}
+}

includes/engine/class-tmdo-schema-manager.php

@@ -23,6 +23,12 @@ final class TMDO_Schema_Manager {
 	/** Option: "entity/group" → md5 of the composite index definition already applied. */
 	public const INDEXES_OPTION = 'tmdo_entity_indexes';
 
+	/** Single cron event that adds declared indexes a visitor request had to leave out. */
+	public const INDEXES_HOOK = 'tmdo_ensure_group_indexes';
+
+	/** Option: "entity/group" → time an existing table's upgrade was left to WP-CLI / WP-Cron. */
+	public const DEFERRED_OPTION = 'tmdo_schema_deferred';
+
 	/** Request-scoped cache for table_exists() — prevents repeated SHOW TABLES per request. */
 	private static array $table_exists_cache = array();
 
@@ -77,13 +83,13 @@ final class TMDO_Schema_Manager {
 		string $group_name,
 		array $field_definitions
 	): bool {
-		global $wpdb;
-
 		// Schema 版本比對：若未變動則跳過
 		$schema_hash = self::calculate_schema_hash( $field_definitions );
 		$stored_hash = self::get_stored_schema_hash( $entity_type, $group_name );
 
 		if ( $stored_hash === $schema_hash ) {
+			// Upgraded meanwhile, or the definition went back to the stored one.
+			self::end_deferral( $entity_type, $group_name );
 			return true;
 		}
 
@@ -92,7 +98,55 @@ final class TMDO_Schema_Manager {
 			return false;
 		}
 
-		$table   = self::get_table_name( $entity_type, $group_name );
+		$table = self::get_table_name( $entity_type, $group_name );
+		if ( self::upgrade_waits( $entity_type, $table ) ) {
+			self::defer_upgrade( "{$entity_type}/{$group_name}" );
+			return false;
+		}
+		if ( ! self::table_exists( $table ) ) {
+			if ( ! self::write_table( $entity_type, $group_name, $field_definitions, $adapter, $table, $schema_hash ) ) {
+				return false;
+			}
+			// A new table starts empty while native meta may already hold the
+			// group's values: native until the drift fix has filled it in.
+			if ( TMDO_Mode_Manager::writes_to_flat( $entity_type ) && TMDO_Mode_Manager::MODE_AEAV_ONLY !== TMDO_Mode_Manager::get( $entity_type ) ) {
+				self::record_deferred( "{$entity_type}/{$group_name}" );
+				self::end_deferral( $entity_type, $group_name );
+			}
+			return true;
+		}
+
+		// An existing table is altered by one process at a time (anonymous
+		// /wp-cron.php requests also pass ddl_allowed()); a process that waited
+		// finds the upgrade done.
+		if ( ! self::lock() ) {
+			return false;
+		}
+		try {
+			if ( self::get_stored_schema_hash( $entity_type, $group_name ) === $schema_hash ) {
+				return true;
+			}
+			return self::write_table( $entity_type, $group_name, $field_definitions, $adapter, $table, $schema_hash );
+		} finally {
+			self::unlock();
+		}
+	}
+
+	/**
+	 * Create or alter the table (dbDelta) and record its definition.
+	 *
+	 * @param string                           $entity_type       Entity type.
+	 * @param string                           $group_name        Group name.
+	 * @param array<int, array<string, mixed>> $field_definitions Normalized fields.
+	 * @param TMDO_Entity_Adapter_Interface    $adapter           Entity adapter.
+	 * @param string                           $table             Table name.
+	 * @param string                           $schema_hash       Definition hash.
+	 * @return bool
+	 */
+	private static function write_table( string $entity_type, string $group_name, array $field_definitions, TMDO_Entity_Adapter_Interface $adapter, string $table, string $schema_hash ): bool {
+		global $wpdb;
+		$existed = self::table_exists( $table );
+
 		$charset = $wpdb->get_charset_collate();
 		$id_col  = $adapter->get_entity_id_column();
 
@@ -144,6 +198,11 @@ final class TMDO_Schema_Manager {
 			}
 		}
 
+		// A new table gets its declared composite indexes while it is empty.
+		foreach ( TMDO_Entity_Registry::get_group_indexes( $entity_type, $group_name ) as $name => $keys ) {
+			$sql_indexes[] = 'KEY `cidx_' . self::sanitize_column_name( (string) $name ) . '` (' . implode( ', ', array_map( static fn( $key ) => '`' . self::sanitize_column_name( $key ) . '`', $keys ) ) . ')';
+		}
+
 		$columns_sql = implode( ",\n  ", $sql_columns );
 		$indexes_sql = implode( ",\n  ", $sql_indexes );
 
@@ -157,8 +216,27 @@ final class TMDO_Schema_Manager {
 		// Bust the request-scoped table_exists cache so subsequent calls see the new table.
 		self::$table_exists_cache[ $table ] = true;
 
+		// dbDelta reports no failure: record the definition only when every column is there.
+		$columns = (array) $wpdb->get_col( "SHOW COLUMNS FROM `{$table}`" );
+		$missing = array_diff( array_map( static fn( $field ) => self::sanitize_column_name( (string) $field['key'] ), $field_definitions ), $columns );
+		if ( $missing ) {
+			unset( self::$table_exists_cache[ $table ] );
+			TMDO_Logger::warning(
+				'schema.upgrade_failed',
+				array(
+					'table'   => $table,
+					'missing' => array_values( $missing ),
+					'error'   => $wpdb->last_error,
+				)
+			);
+			return false;
+		}
+
 		// 記錄 Schema 版本與定義
 		self::store_schema_metadata( $entity_type, $group_name, $schema_hash, $field_definitions );
+		if ( $existed ) {
+			self::end_deferral( $entity_type, $group_name );
+		}
 
 		/**
 		 * Action: 表建立／升級完成
@@ -176,6 +254,12 @@ final class TMDO_Schema_Manager {
 	 * applied definition is remembered per group (one autoloaded option), so
 	 * requests only run SHOW INDEX / ALTER when the declaration changes.
 	 *
+	 * On a large table the ALTER takes seconds, so it runs only from WP-CLI or
+	 * WP-Cron (ddl_allowed(); other requests schedule INDEXES_HOOK) and in one
+	 * process at a time (MySQL GET_LOCK on index_lock_name()). Until every
+	 * ALTER succeeds the group stays in pending_indexes() and the table works
+	 * without the index.
+	 *
 	 * @param string $entity_type Entity type.
 	 * @param string $group_name  Group name.
 	 * @return void
@@ -193,23 +277,249 @@ final class TMDO_Schema_Manager {
 		if ( ( $applied[ $id ] ?? '' ) === $signature ) {
 			return;
 		}
+		if ( ! self::ddl_allowed() ) {
+			if ( ! wp_next_scheduled( self::INDEXES_HOOK ) ) {
+				wp_schedule_single_event( time(), self::INDEXES_HOOK );
+			}
+			return;
+		}
 		$table = self::get_table_name( $entity_type, $group_name );
 		if ( ! self::table_exists( $table ) ) {
 			return;
 		}
 
-		$existing = array_unique( array_column( (array) $wpdb->get_results( "SHOW INDEX FROM `{$table}`", ARRAY_A ), 'Key_name' ) );
-		foreach ( $declared as $name => $keys ) {
-			$index = 'cidx_' . self::sanitize_column_name( $name );
-			if ( in_array( $index, $existing, true ) ) {
-				continue;
-			}
-			$columns = implode( ', ', array_map( static fn( $key ) => '`' . self::sanitize_column_name( $key ) . '`', $keys ) );
-			$wpdb->query( "ALTER TABLE `{$table}` ADD INDEX `{$index}` ({$columns})" );
+		if ( ! self::lock() ) {
+			return; // Another process is adding indexes.
 		}
+		try {
+			// SHOW INDEX (not the option, cached for this request) tells what another process already added.
+			$existing = array_unique( array_column( (array) $wpdb->get_results( "SHOW INDEX FROM `{$table}`", ARRAY_A ), 'Key_name' ) );
+			$failed   = false;
+			foreach ( $declared as $name => $keys ) {
+				$index = 'cidx_' . self::sanitize_column_name( $name );
+				if ( in_array( $index, $existing, true ) ) {
+					continue;
+				}
+				$columns = implode( ', ', array_map( static fn( $key ) => '`' . self::sanitize_column_name( $key ) . '`', $keys ) );
+				if ( false === $wpdb->query( "ALTER TABLE `{$table}` ADD INDEX `{$index}` ({$columns})" ) ) {
+					$failed = true;
+					TMDO_Logger::warning(
+						'schema.index_failed',
+						array(
+							'table' => $table,
+							'index' => $index,
+							'error' => $wpdb->last_error,
+						)
+					);
+				}
+			}
 
-		$applied[ $id ] = $signature;
-		update_option( self::INDEXES_OPTION, $applied, true );
+			if ( ! $failed ) {
+				$applied[ $id ] = $signature;
+				update_option( self::INDEXES_OPTION, $applied, true );
+			}
+		} finally {
+			self::unlock();
+		}
+	}
+
+	/**
+	 * INDEXES_HOOK handler: the table upgrades and indexes a web request left.
+	 * The cron request's init usually did them already; not with
+	 * ALTERNATE_WP_CRON, where the event runs inside a visitor's request.
+	 *
+	 * @return void
+	 */
+	public static function ensure_pending_indexes(): void {
+		foreach ( array_keys( (array) get_option( self::DEFERRED_OPTION, array() ) ) as $id ) {
+			list( $entity_type, $group_name ) = array_pad( explode( '/', (string) $id, 2 ), 2, '' );
+			$fields                           = TMDO_Entity_Registry::get_group_fields( $entity_type, $group_name );
+			if ( $fields ) {
+				self::create_or_upgrade_table( $entity_type, $group_name, $fields );
+			}
+		}
+		foreach ( self::pending_indexes() as $id ) {
+			list( $entity_type, $group_name ) = explode( '/', $id, 2 );
+			self::ensure_group_indexes( $entity_type, $group_name );
+		}
+	}
+
+	/**
+	 * Whether the group's table upgrade is waiting for WP-CLI / WP-Cron; its
+	 * keys then stay native (Hook Bus, query router).
+	 *
+	 * @param string $entity_type Entity type.
+	 * @param string $group_name  Group name.
+	 * @return bool
+	 */
+	public static function is_deferred( string $entity_type, string $group_name ): bool {
+		$deferred = get_option( self::DEFERRED_OPTION, array() );
+		return is_array( $deferred ) && isset( $deferred[ "{$entity_type}/{$group_name}" ] );
+	}
+
+	/**
+	 * Whether an existing table's upgrade waits for WP-CLI / WP-Cron: altering
+	 * a large table takes seconds to minutes, as for indexes. Until then the
+	 * group reads and writes native meta (is_deferred()). Not in aeav_only,
+	 * where the flat table is the only copy: that upgrade runs at once.
+	 *
+	 * @param string $entity_type Entity type.
+	 * @param string $table       Flat table name.
+	 * @return bool
+	 */
+	public static function upgrade_waits( string $entity_type, string $table ): bool {
+		return self::table_exists( $table )
+			&& ! self::ddl_allowed()
+			&& TMDO_Mode_Manager::MODE_AEAV_ONLY !== TMDO_Mode_Manager::get( $entity_type );
+	}
+
+	/**
+	 * Record a deferred table upgrade and have WP-Cron run it.
+	 *
+	 * @param string $id "entity/group".
+	 * @return void
+	 */
+	private static function defer_upgrade( string $id ): void {
+		self::record_deferred( $id );
+		if ( ! wp_next_scheduled( self::INDEXES_HOOK ) ) {
+			wp_schedule_single_event( time(), self::INDEXES_HOOK ); // Its request's init runs the upgrade.
+		}
+	}
+
+	/**
+	 * Record a group as deferred (native until resynced()).
+	 *
+	 * @param string $id "entity/group".
+	 * @return void
+	 */
+	private static function record_deferred( string $id ): void {
+		$deferred = get_option( self::DEFERRED_OPTION, array() );
+		$deferred = is_array( $deferred ) ? $deferred : array();
+		if ( ! isset( $deferred[ $id ] ) ) {
+			$deferred[ $id ] = time();
+			update_option( self::DEFERRED_OPTION, $deferred, true );
+		}
+	}
+
+	/**
+	 * A deferred upgrade is done. Writes made meanwhile skipped the flat table,
+	 * so the group stays native until a drift fix (tmdo_drift_resync, a minute
+	 * later) has rebuilt it from native and calls resynced(). With no flat
+	 * writes (disabled), nothing is behind.
+	 *
+	 * @param string $entity_type Entity type.
+	 * @param string $group_name  Group name.
+	 * @return void
+	 */
+	private static function end_deferral( string $entity_type, string $group_name ): void {
+		if ( ! self::is_deferred( $entity_type, $group_name ) ) {
+			return;
+		}
+		if ( ! TMDO_Mode_Manager::writes_to_flat( $entity_type ) ) {
+			$deferred = (array) get_option( self::DEFERRED_OPTION, array() );
+			unset( $deferred[ "{$entity_type}/{$group_name}" ] );
+			update_option( self::DEFERRED_OPTION, $deferred, true );
+			return;
+		}
+		if ( ! wp_next_scheduled( TMDO_Drift_Check::RESYNC_HOOK, array( $entity_type ) ) ) {
+			wp_schedule_single_event( time() + MINUTE_IN_SECONDS, TMDO_Drift_Check::RESYNC_HOOK, array( $entity_type ) );
+		}
+	}
+
+	/**
+	 * A drift fix of the entity succeeded: its deferred groups whose table is
+	 * upgraded read and write the flat table again.
+	 *
+	 * @param string $entity_type Entity type.
+	 * @return void
+	 */
+	public static function resynced( string $entity_type ): void {
+		$deferred = get_option( self::DEFERRED_OPTION, array() );
+		if ( ! is_array( $deferred ) || ! $deferred ) {
+			return;
+		}
+		foreach ( array_keys( $deferred ) as $id ) {
+			list( $type, $group ) = array_pad( explode( '/', (string) $id, 2 ), 2, '' );
+			if ( $type === $entity_type && self::get_stored_schema_hash( $type, $group ) === self::calculate_schema_hash( TMDO_Entity_Registry::get_group_fields( $type, $group ) ) ) {
+				unset( $deferred[ $id ] );
+			}
+		}
+		update_option( self::DEFERRED_OPTION, $deferred, true );
+	}
+
+	/**
+	 * Take the schema lock without waiting.
+	 *
+	 * add_option() is INSERT ... ON DUPLICATE KEY UPDATE and would let two
+	 * processes both "acquire" an option lock; GET_LOCK is atomic and is
+	 * released by MySQL if this process dies. Re-entrant per connection.
+	 *
+	 * @return bool False when another process holds it.
+	 */
+	private static function lock(): bool {
+		global $wpdb;
+		if ( method_exists( $wpdb, 'send_reads_to_masters' ) ) {
+			// HyperDB / LudicrousDB would send the SELECT GET_LOCK to a replica,
+			// where it locks nothing against the ALTER on the primary.
+			$wpdb->send_reads_to_masters();
+		}
+		return '1' === (string) $wpdb->get_var( $wpdb->prepare( 'SELECT GET_LOCK(MD5(CONCAT(DATABASE(), %s)), 0)', self::index_lock_name() ) );
+	}
+
+	/**
+	 * Release the schema lock.
+	 *
+	 * @return void
+	 */
+	private static function unlock(): void {
+		global $wpdb;
+		$wpdb->query( $wpdb->prepare( 'SELECT RELEASE_LOCK(MD5(CONCAT(DATABASE(), %s)))', self::index_lock_name() ) );
+	}
+
+	/**
+	 * Key of the MySQL lock held while indexes are added. Lock names are
+	 * server-wide, so SQL hashes it with DATABASE() to keep sites apart.
+	 *
+	 * @return string
+	 */
+	public static function index_lock_name(): string {
+		global $wpdb;
+		return $wpdb->prefix . self::INDEXES_OPTION;
+	}
+
+	/**
+	 * Whether this request may alter flat tables: WP-CLI or WP-Cron only.
+	 * Front-end, REST, admin-ajax, admin-post and even /wp-admin/ requests
+	 * (init runs before auth_redirect()) can be a visitor's, who would wait
+	 * for the ALTER. Filter: `tmdo_schema_ddl_allowed`.
+	 *
+	 * @return bool
+	 */
+	public static function ddl_allowed(): bool {
+		$allowed = ( defined( 'WP_CLI' ) && WP_CLI )
+			|| ( function_exists( 'wp_doing_cron' ) && wp_doing_cron() );
+		return (bool) apply_filters( 'tmdo_schema_ddl_allowed', $allowed );
+	}
+
+	/**
+	 * Registered groups whose declared indexes are not on their table yet.
+	 *
+	 * @return string[] "entity/group"
+	 */
+	public static function pending_indexes(): array {
+		$applied = get_option( self::INDEXES_OPTION, array() );
+		$applied = is_array( $applied ) ? $applied : array();
+		$pending = array();
+		foreach ( TMDO_Entity_Registry::VALID_ENTITY_TYPES as $entity_type ) {
+			foreach ( TMDO_Entity_Registry::get_groups_for_type( $entity_type ) as $group_name ) {
+				$declared = TMDO_Entity_Registry::get_group_indexes( $entity_type, $group_name );
+				if ( $declared && ( $applied[ "{$entity_type}/{$group_name}" ] ?? '' ) !== md5( (string) wp_json_encode( $declared ) )
+					&& self::table_exists( self::get_table_name( $entity_type, $group_name ) ) ) {
+					$pending[] = "{$entity_type}/{$group_name}";
+				}
+			}
+		}
+		return $pending;
 	}
 
 	/**

includes/engine/class-tmdo-shadow-diff-logger.php

@@ -31,6 +31,14 @@ final class TMDO_Shadow_Diff_Logger {
 	/** Rate limit 視窗(秒)— 同 entity+key 在此視窗內重複 diff 不重記 */
 	public const RATELIMIT_WINDOW = 300;
 
+	/**
+	 * Rows per entity type + key per KEY_WINDOW, across all objects: a key
+	 * stale on every object (WooCommerce total_sales, written by direct SQL)
+	 * must not log a row for each object read.
+	 */
+	public const KEY_LIMIT  = 20;
+	public const KEY_WINDOW = 3600;
+
 	public static function table_name(): string {
 		global $wpdb;
 		return $wpdb->prefix . 'wpdo_shadow_diffs';
@@ -69,7 +77,7 @@ final class TMDO_Shadow_Diff_Logger {
 		}
 
 		// 不一致 → 檢查 rate limit
-		if ( self::is_rate_limited( $entity_type, $entity_id, $meta_key ) ) {
+		if ( self::is_rate_limited( $entity_type, $entity_id, $meta_key ) || self::key_over_limit( $entity_type, $meta_key ) ) {
 			return;
 		}
 
@@ -183,6 +191,21 @@ final class TMDO_Shadow_Diff_Logger {
 		return false;
 	}
 
+	/**
+	 * Count this diff against the key's KEY_LIMIT; true once the limit is
+	 * reached within the current KEY_WINDOW (the window starts at its first row).
+	 */
+	private static function key_over_limit( string $entity_type, string $meta_key ): bool {
+		$key   = 'wpdo_sd_kl_' . md5( "{$entity_type}:{$meta_key}" );
+		$state = get_transient( $key );
+		$state = is_array( $state ) ? $state : array( 0, time() );
+		if ( $state[0] >= self::KEY_LIMIT ) {
+			return true;
+		}
+		set_transient( $key, array( $state[0] + 1, $state[1] ), max( 1, $state[1] + self::KEY_WINDOW - time() ) );
+		return false;
+	}
+
 	/**
 	 * 寫入 diff row
 	 *

includes/engine/class-tmdo-type-caster.php

@@ -70,10 +70,12 @@ final class TMDO_Type_Caster {
 				return $value;
 
 			case 'text':
-				return (string) $value;
+				return self::fit_text( is_scalar( $value ) ? (string) $value : maybe_serialize( $value ), $field_def );
 
 			case 'textarea':
-				return (string) $value;
+				// Arrays / objects are serialized like WP stores them in native meta;
+				// (string) would store the literal "Array".
+				return is_scalar( $value ) ? (string) $value : maybe_serialize( $value );
 
 			default:
 				// 未知型別：嘗試序列化（向後相容 WordPress get_metadata 行為）
@@ -81,6 +83,33 @@ final class TMDO_Type_Caster {
 		}
 	}
 
+	/** 'text' columns are VARCHAR(255) (TMDO_Schema_Manager type map). */
+	public const TEXT_MAX_CHARS = 255;
+
+	/**
+	 * Keep a text value only if it fits its VARCHAR(255) column; otherwise
+	 * store NULL (native meta keeps the full value) and log the overflow.
+	 *
+	 * @param string               $value     Value to store.
+	 * @param array<string, mixed> $field_def Field definition.
+	 * @return string|null
+	 */
+	private static function fit_text( string $value, array $field_def ): ?string {
+		$length = mb_strlen( $value );
+		if ( $length <= self::TEXT_MAX_CHARS ) {
+			return $value;
+		}
+		TMDO_Logger::warning(
+			'text_overflow',
+			array(
+				'group'  => $field_def['group'] ?? '',
+				'key'    => $field_def['key'] ?? '',
+				'length' => $length,
+			)
+		);
+		return null;
+	}
+
 	/**
 	 * DB → PHP 轉換（讀取）
 	 */
@@ -111,9 +140,12 @@ final class TMDO_Type_Caster {
 				return ( json_last_error() === JSON_ERROR_NONE ) ? $decoded : $value;
 
 			case 'enum':
+				return (string) $value;
+
 			case 'text':
 			case 'textarea':
-				return (string) $value;
+				// Arrays were stored serialized (to_db); plain strings pass through.
+				return TMDO_Safe_Unserialize::run( (string) $value );
 
 			default:
 				// v2.13.3: object-injection-safe unserialize (fixes L-DESER-1).

includes/integrations/class-tmdo-post-fields.php

@@ -2,19 +2,18 @@
 /**
  * Post entity field registration for WP Data Optimizer (v2.9.1).
  *
- * Registers four post entity groups designed to absorb the bulk of
+ * Registers three post entity groups designed to absorb the bulk of
  * wp_postmeta rows that previously bypassed any flat-table strategy.
  * All groups use TMDO_Entity_Registry → flat tables instead of wp_postmeta EAV.
  *
  * Groups → flat tables (post_type targets):
  *   wp_core         → wp_wpdo_post_wp_core         (cross post_type)
  *   attachment      → wp_wpdo_post_attachment      (attachment)
- *   wc_product      → wp_wpdo_post_wc_product      (product)
  *   nav_menu_item   → wp_wpdo_post_nav_menu_item   (nav_menu_item)
  *
  * Pattern mirrors TMDO_Member_Fields::register(). Called from
  * TMDO_Core::run() before the wpdo_register_entity_fields action fires;
- * Schema_Manager materializes the four flat tables in init:1
+ * Schema_Manager materializes the three flat tables in init:1
  * via process_pending_migrations() (idempotent via schema_hash compare).
  *
  * Keys not registered here (HivePress dynamic attrs, WPCS legacy keys,
@@ -39,7 +38,10 @@ if ( ! defined( 'ABSPATH' ) ) {
 }
 
 /**
- * Registers four post entity groups.
+ * Registers three post entity groups. WooCommerce product meta is not one of
+ * them (1.2.0): WooCommerce reads it directly and writes stock by SQL, so
+ * native meta stays its only copy. Existing wp_wpdo_post_wc_product tables
+ * are left alone (see `wp tmdo bridge-restore-native post --group=wc_product --retire`).
  */
 final class TMDO_Post_Fields {
 
@@ -49,7 +51,6 @@ final class TMDO_Post_Fields {
 	 */
 	private const GROUP_POST_TYPES = array(
 		'attachment'    => 'attachment',
-		'wc_product'    => 'product',
 		'nav_menu_item' => 'nav_menu_item',
 	);
 
@@ -104,7 +105,6 @@ final class TMDO_Post_Fields {
 
 		self::register_wp_core_group();
 		self::register_attachment_group();
-		self::register_wc_product_group();
 		self::register_nav_menu_item_group();
 	}
 
@@ -176,131 +176,6 @@ final class TMDO_Post_Fields {
 		);
 	}
 
-	/**
-	 * WooCommerce product core meta keys (post_type=product).
-	 * 19 keys — covers ~94% of wp_postmeta rows for products on dev10.
-	 *
-	 * @return void
-	 */
-	private static function register_wc_product_group(): void {
-		TMDO_Entity_Registry::register_group(
-			'post',
-			'wc_product',
-			array(
-				array(
-					'key'        => '_price',
-					'type'       => 'decimal',
-					'searchable' => true,
-					'label'      => 'Effective price',
-				),
-				array(
-					'key'        => '_regular_price',
-					'type'       => 'decimal',
-					'searchable' => true,
-					'label'      => 'Regular price',
-				),
-				array(
-					'key'        => '_sale_price',
-					'type'       => 'decimal',
-					'searchable' => true,
-					'label'      => 'Sale price',
-				),
-				array(
-					'key'        => '_stock',
-					'type'       => 'integer',
-					'searchable' => true,
-					'label'      => 'Stock quantity',
-				),
-				array(
-					'key'        => '_stock_status',
-					'type'       => 'enum',
-					'searchable' => true,
-					'options'    => array( 'instock', 'outofstock', 'onbackorder' ),
-					'label'      => 'Stock status',
-				),
-				array(
-					'key'        => '_sku',
-					'type'       => 'text',
-					'searchable' => true,
-					'label'      => 'Product SKU',
-				),
-				array(
-					'key'     => '_manage_stock',
-					'type'    => 'enum',
-					'options' => array( 'yes', 'no' ),
-					'label'   => 'Manage stock?',
-				),
-				array(
-					'key'     => '_backorders',
-					'type'    => 'enum',
-					'options' => array( 'yes', 'no', 'notify' ),
-					'label'   => 'Allow backorders?',
-				),
-				array(
-					'key'     => '_sold_individually',
-					'type'    => 'enum',
-					'options' => array( 'yes', 'no' ),
-					'label'   => 'Sold individually?',
-				),
-				array(
-					'key'     => '_virtual',
-					'type'    => 'enum',
-					'options' => array( 'yes', 'no' ),
-					'label'   => 'Virtual product?',
-				),
-				array(
-					'key'     => '_downloadable',
-					'type'    => 'enum',
-					'options' => array( 'yes', 'no' ),
-					'label'   => 'Downloadable?',
-				),
-				array(
-					'key'   => '_tax_class',
-					'type'  => 'text',
-					'label' => 'Tax class slug',
-				),
-				array(
-					'key'     => '_tax_status',
-					'type'    => 'enum',
-					'options' => array( 'taxable', 'shipping', 'none' ),
-					'label'   => 'Tax status',
-				),
-				array(
-					'key'   => '_download_limit',
-					'type'  => 'integer',
-					'label' => 'Download limit',
-				),
-				array(
-					'key'   => '_download_expiry',
-					'type'  => 'integer',
-					'label' => 'Download expiry days',
-				),
-				array(
-					'key'   => '_product_version',
-					'type'  => 'text',
-					'label' => 'WC version product was created on',
-				),
-				array(
-					'key'        => '_wc_average_rating',
-					'type'       => 'decimal',
-					'searchable' => true,
-					'label'      => 'Average rating',
-				),
-				array(
-					'key'   => '_wc_review_count',
-					'type'  => 'integer',
-					'label' => 'Review count',
-				),
-				array(
-					'key'        => 'total_sales',
-					'type'       => 'integer',
-					'searchable' => true,
-					'label'      => 'Total sales count',
-				),
-			)
-		);
-	}
-
 	/**
 	 * Nav menu item meta keys (post_type=nav_menu_item).
 	 *

includes/migration/class-tmdo-array-literal-repair.php

@@ -0,0 +1,111 @@
+<?php
+/**
+ * TMDO_Array_Literal_Repair — finds flat text / textarea values stored as the
+ * literal "Array" (pre-1.1.0 type caster cast arrays with (string)) and
+ * rewrites them from native meta.
+ *
+ * Native rows that are themselves "Array" (written back by an earlier
+ * bridge-restore-native) cannot be repaired here: they are only listed, to be
+ * restored from a backup.
+ *
+ * @package WP_Data_Optimizer
+ */
+
+declare(strict_types=1);
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+// phpcs:disable WordPress.DB.PreparedSQL.InterpolatedNotPrepared,WordPress.DB.DirectDatabaseQuery -- table / column names come from the registry and adapter; values are prepared.
+
+/**
+ * Repairs "Array" literals in flat text / textarea columns.
+ */
+final class TMDO_Array_Literal_Repair {
+
+	/** What (string) array produced. */
+	private const LITERAL = 'Array';
+
+	/**
+	 * Scan (and optionally repair) one entity type.
+	 *
+	 * @param string $entity_type Entity type.
+	 * @param bool   $apply       Write repairs; false = report only.
+	 * @return array{found:int, repairable:int, repaired:int, unrepairable:array<int, array{group:string, key:string, id:int, reason:string}>, native_polluted:array<int, array{group:string, key:string, id:int}>}
+	 */
+	public static function run( string $entity_type, bool $apply ): array {
+		global $wpdb;
+
+		$report = array(
+			'found'           => 0,
+			'repairable'      => 0,
+			'repaired'        => 0,
+			'unrepairable'    => array(),
+			'native_polluted' => array(),
+		);
+
+		$adapter = TMDO_Entity_Registry::get_adapter( $entity_type );
+		if ( ! $adapter ) {
+			return $report;
+		}
+		$meta_table = $adapter->get_native_meta_table();
+		$id_col     = $adapter->get_entity_id_column();
+		$meta_pk    = 'user' === $entity_type ? 'umeta_id' : 'meta_id';
+
+		foreach ( TMDO_Entity_Registry::get_groups_for_type( $entity_type ) as $group ) {
+			$table = TMDO_Schema_Manager::get_table_name( $entity_type, $group );
+			if ( ! TMDO_Schema_Manager::table_exists( $table ) ) {
+				continue;
+			}
+
+			foreach ( TMDO_Entity_Registry::get_group_fields( $entity_type, $group ) as $field ) {
+				if ( ! in_array( $field['type'] ?? 'text', array( 'text', 'textarea' ), true ) ) {
+					continue;
+				}
+				$key = (string) $field['key'];
+				$col = TMDO_Schema_Manager::sanitize_column_name( $key );
+
+				$ids = $wpdb->get_col( $wpdb->prepare( "SELECT `{$id_col}` FROM `{$table}` WHERE `{$col}` = %s", self::LITERAL ) );
+				foreach ( $ids as $id ) {
+					$id = (int) $id;
+					++$report['found'];
+
+					$native = $wpdb->get_var( $wpdb->prepare( "SELECT meta_value FROM `{$meta_table}` WHERE `{$id_col}` = %d AND meta_key = %s ORDER BY `{$meta_pk}` LIMIT 1", $id, $key ) );
+					$reason = null === $native ? 'no_native_row' : ( self::LITERAL === $native ? 'native_is_array_literal' : '' );
+					if ( '' !== $reason ) {
+						$report['unrepairable'][] = array(
+							'group'  => $group,
+							'key'    => $key,
+							'id'     => $id,
+							'reason' => $reason,
+						);
+						continue;
+					}
+
+					++$report['repairable'];
+					if ( $apply ) {
+						$value = TMDO_Type_Caster::to_db( TMDO_Safe_Unserialize::run( $native ), $field + array( 'group' => $group ) );
+						$wpdb->update( $table, array( $col => $value ), array( $id_col => $id ) );
+						++$report['repaired'];
+					}
+				}
+
+				$polluted = $wpdb->get_col( $wpdb->prepare( "SELECT DISTINCT `{$id_col}` FROM `{$meta_table}` WHERE meta_key = %s AND meta_value = %s", $key, self::LITERAL ) );
+				foreach ( $polluted as $id ) {
+					$report['native_polluted'][] = array(
+						'group' => $group,
+						'key'   => $key,
+						'id'    => (int) $id,
+					);
+				}
+			}
+		}
+
+		if ( $report['repaired'] > 0 ) {
+			TMDO_Cache_Orchestrator::flush_entity( $entity_type );
+		}
+
+		return $report;
+	}
+}

includes/migration/class-tmdo-native-restorer.php

@@ -14,6 +14,16 @@
  *     the value Type_Caster returns); a NULL value deletes the native row.
  *   - Entities with no row in the owning group's table are not touched:
  *     leftover native rows for them are outside the flat data.
+ *   - A flat value equal to its field default is not written for an entity
+ *     that has no native row (e.g. activity.session_count = 0): that would
+ *     invent native meta the entity never had.
+ *
+ * Policy (which side wins where both hold a value):
+ *   - overwrite    — flat wins; the default in aeav_only, where writes only
+ *                    reached the flat tables and native is stale.
+ *   - only_missing — native wins, flat only fills gaps; the default in every
+ *                    other mode, where native is the source of truth (and may
+ *                    be newer, e.g. WooCommerce stock written with direct SQL).
  *
  * Batched by entity id with a cursor option so an interrupted run resumes; a
  * final pass re-copies rows updated since the first run started. With
@@ -52,14 +62,19 @@ final class TMDO_Native_Restorer {
 	 * @param int    $batch       Rows per batch.
 	 * @param bool   $demote      After a complete run, switch the entity to dual_write.
 	 * @param string $group       Only this group ('' = every group).
-	 * @return array{groups: array<string, array{rows:int, written:int}>, demoted: bool}
+	 * @param string $policy      'overwrite' | 'only_missing' | '' (by the entity's mode).
+	 * @return array{groups: array<string, array{rows:int, written:int, missing:int, differs:int, same:int, default_skipped:int}>, demoted: bool, policy: string}
 	 */
-	public static function run( string $entity_type, bool $dry_run = false, int $batch = 500, bool $demote = false, string $group = '' ): array {
+	public static function run( string $entity_type, bool $dry_run = false, int $batch = 500, bool $demote = false, string $group = '', string $policy = '' ): array {
 		global $wpdb;
 
+		if ( ! in_array( $policy, array( 'overwrite', 'only_missing' ), true ) ) {
+			$policy = TMDO_Mode_Manager::MODE_AEAV_ONLY === TMDO_Mode_Manager::get( $entity_type ) ? 'overwrite' : 'only_missing';
+		}
 		$report  = array(
 			'groups'  => array(),
 			'demoted' => false,
+			'policy'  => $policy,
 		);
 		$adapter = TMDO_Entity_Registry::get_adapter( $entity_type );
 		if ( ! $adapter ) {
@@ -83,8 +98,12 @@ final class TMDO_Native_Restorer {
 		}
 		foreach ( $tables as $group => $table ) {
 			$entry = array(
-				'rows'    => 0,
-				'written' => 0,
+				'rows'            => 0,
+				'written'         => 0,
+				'missing'         => 0,
+				'differs'         => 0,
+				'same'            => 0,
+				'default_skipped' => 0,
 			);
 			$key   = "{$entity_type}/{$group}";
 			$last  = $dry_run ? 0 : (int) ( $cursor[ $key ] ?? 0 );
@@ -94,9 +113,11 @@ final class TMDO_Native_Restorer {
 				$entry['rows'] += $fetched;
 				if ( $fetched ) {
 					$last = (int) end( $rows )[ $id_col ];
+					foreach ( self::apply_rows( $entity_type, $group, $adapter, $rows, $policy, ! $dry_run ) as $count_key => $n ) {
+						$entry[ $count_key ] += $n;
+					}
 					if ( ! $dry_run ) {
-						$entry['written'] += self::write_rows( $entity_type, $group, $adapter, $rows );
-						$cursor[ $key ]    = $last;
+						$cursor[ $key ] = $last;
 						update_option( self::CURSOR_OPTION, $cursor, false );
 					}
 				}
@@ -112,7 +133,7 @@ final class TMDO_Native_Restorer {
 		// Catch-up: writes that landed in the flat tables after a batch passed their row.
 		foreach ( $tables as $group => $table ) {
 			$rows = self::fetch( $entity_type, $table, $id_col, 't.updated_at >= %s', array( $started[ $entity_type ] ) );
-			self::write_rows( $entity_type, $group, $adapter, $rows );
+			self::apply_rows( $entity_type, $group, $adapter, $rows, $policy, true );
 		}
 
 		foreach ( array_keys( $tables ) as $group ) {
@@ -235,24 +256,87 @@ final class TMDO_Native_Restorer {
 	}
 
 	/**
-	 * Replace the native meta of the keys this group owns for each row.
+	 * Compare the native meta of the keys this group owns with the flat rows,
+	 * and (when $write) bring native in line according to $policy.
 	 *
 	 * @param string                           $entity_type Entity type.
 	 * @param string                           $group       Group the rows come from.
 	 * @param TMDO_Entity_Adapter_Interface    $adapter     Entity adapter.
 	 * @param array<int, array<string, mixed>> $rows        Flat rows.
-	 * @return int Native values written.
+	 * @param string                           $policy      'overwrite' | 'only_missing'.
+	 * @param bool                             $write       False = classify only (dry run).
+	 * @return array{written:int, missing:int, differs:int, same:int, default_skipped:int}
 	 */
-	private static function write_rows( string $entity_type, string $group, TMDO_Entity_Adapter_Interface $adapter, array $rows ): int {
-		global $wpdb;
-		if ( empty( $rows ) ) {
-			return 0;
+	private static function apply_rows( string $entity_type, string $group, TMDO_Entity_Adapter_Interface $adapter, array $rows, string $policy, bool $write ): array {
+		$counts                  = array(
+			'written'         => 0,
+			'missing'         => 0,
+			'differs'         => 0,
+			'same'            => 0,
+			'default_skipped' => 0,
+		);
+		list( $wanted, $fields ) = self::flat_values( $entity_type, $group, $adapter, $rows );
+		if ( empty( $wanted ) ) {
+			return $counts;
 		}
-		$meta_table = $adapter->get_native_meta_table();
-		$id_col     = $adapter->get_entity_id_column();
+		$native = self::native_values( $entity_type, $adapter, array_keys( $wanted ), array_keys( $fields ) );
 
 		$deletes = array();
 		$inserts = array();
+		foreach ( $wanted as $id => $values ) {
+			foreach ( $values as $key => $value ) {
+				$has = isset( $native[ $id ] ) && array_key_exists( $key, $native[ $id ] );
+				if ( null === $value ) {
+					if ( $has ) {
+						++$counts['differs'];
+						if ( 'overwrite' === $policy ) {
+							$deletes[ $key ][] = $id;
+						}
+					}
+					continue;
+				}
+				if ( ! $has ) {
+					if ( self::is_default( $value, $fields[ $key ] ) ) {
+						++$counts['default_skipped'];
+						continue;
+					}
+					++$counts['missing'];
+					$inserts[] = array( $id, $key, $value );
+					continue;
+				}
+				if ( self::same_value( $native[ $id ][ $key ], $value ) ) {
+					++$counts['same'];
+					continue;
+				}
+				++$counts['differs'];
+				if ( 'overwrite' === $policy ) {
+					$deletes[ $key ][] = $id;
+					$inserts[]         = array( $id, $key, $value );
+				}
+			}
+		}
+
+		if ( $write ) {
+			self::write_native( $entity_type, $adapter, $deletes, $inserts, array_keys( $wanted ) );
+			$counts['written'] = count( $inserts );
+		}
+		return $counts;
+	}
+
+	/**
+	 * Values this group would write to native, per entity and key (NULL = none),
+	 * restricted to the keys the group owns for that entity.
+	 *
+	 * @param string                           $entity_type Entity type.
+	 * @param string                           $group       Group name.
+	 * @param TMDO_Entity_Adapter_Interface    $adapter     Entity adapter.
+	 * @param array<int, array<string, mixed>> $rows        Flat rows.
+	 * @return array{0: array<int, array<string, string|null>>, 1: array<string, array<string, mixed>>}
+	 */
+	private static function flat_values( string $entity_type, string $group, TMDO_Entity_Adapter_Interface $adapter, array $rows ): array {
+		$id_col = $adapter->get_entity_id_column();
+		$wanted = array();
+		$fields = array();
 		foreach ( $rows as $row ) {
 			$id        = (int) $row[ $id_col ];
 			$post_type = 'post' === $entity_type ? (string) ( $row['__post_type'] ?? '' ) : '';
@@ -262,25 +346,93 @@ final class TMDO_Native_Restorer {
 				if ( null === $owner || $owner['group'] !== $group || ! array_key_exists( $col, $row ) ) {
 					continue;
 				}
-				$deletes[ $field['key'] ][] = $id;
-				if ( null !== $row[ $col ] ) {
-					$inserts[] = array( $id, $field['key'], (string) maybe_serialize( TMDO_Type_Caster::from_db( $row[ $col ], $field ) ) );
-				}
+				$fields[ $field['key'] ]        = $field;
+				$wanted[ $id ][ $field['key'] ] = null === $row[ $col ]
+					? null
+					: (string) maybe_serialize( TMDO_Type_Caster::from_db( $row[ $col ], $field ) );
 			}
 		}
+		return array( $wanted, $fields );
+	}
 
-		foreach ( $deletes as $meta_key => $ids ) {
-			$in = implode( ',', array_map( 'intval', $ids ) );
+	/**
+	 * First native value per entity and key.
+	 *
+	 * @param string                        $entity_type Entity type.
+	 * @param TMDO_Entity_Adapter_Interface $adapter     Entity adapter.
+	 * @param int[]                         $ids         Entity IDs.
+	 * @param string[]                      $keys        Meta keys.
+	 * @return array<int, array<string, string>>
+	 */
+	private static function native_values( string $entity_type, TMDO_Entity_Adapter_Interface $adapter, array $ids, array $keys ): array {
+		global $wpdb;
+		$meta_table = $adapter->get_native_meta_table();
+		$id_col     = $adapter->get_entity_id_column();
+		$pk         = 'user' === $entity_type ? 'umeta_id' : 'meta_id';
+		$in_ids     = implode( ',', array_map( 'intval', $ids ) );
+		$in_keys    = implode( ',', array_fill( 0, count( $keys ), '%s' ) );
+		$rows       = (array) $wpdb->get_results(
+			$wpdb->prepare( "SELECT `{$id_col}` AS id, meta_key, meta_value FROM `{$meta_table}` WHERE `{$id_col}` IN ({$in_ids}) AND meta_key IN ({$in_keys}) ORDER BY `{$pk}`", ...$keys ),
+			ARRAY_A
+		);
+
+		$native = array();
+		foreach ( $rows as $r ) {
+			if ( ! isset( $native[ (int) $r['id'] ][ $r['meta_key'] ] ) ) {
+				$native[ (int) $r['id'] ][ $r['meta_key'] ] = (string) $r['meta_value'];
+			}
+		}
+		return $native;
+	}
+
+	/**
+	 * Delete / insert native rows and clear the entities' meta caches.
+	 *
+	 * @param string                                       $entity_type Entity type.
+	 * @param TMDO_Entity_Adapter_Interface                $adapter     Entity adapter.
+	 * @param array<string, int[]>                         $deletes     Meta key → entity IDs to clear first.
+	 * @param array<int, array{0:int, 1:string, 2:string}> $inserts Rows to insert.
+	 * @param int[]                                        $ids         Entities touched.
+	 * @return void
+	 */
+	private static function write_native( string $entity_type, TMDO_Entity_Adapter_Interface $adapter, array $deletes, array $inserts, array $ids ): void {
+		global $wpdb;
+		$meta_table = $adapter->get_native_meta_table();
+		$id_col     = $adapter->get_entity_id_column();
+
+		foreach ( $deletes as $meta_key => $del_ids ) {
+			$in = implode( ',', array_map( 'intval', $del_ids ) );
 			$wpdb->query( $wpdb->prepare( "DELETE FROM `{$meta_table}` WHERE meta_key = %s AND `{$id_col}` IN ({$in})", $meta_key ) );
 		}
 		if ( $inserts ) {
 			$values = implode( ', ', array_fill( 0, count( $inserts ), '(%d, %s, %s)' ) );
 			$wpdb->query( $wpdb->prepare( "INSERT INTO `{$meta_table}` (`{$id_col}`, meta_key, meta_value) VALUES {$values}", ...array_merge( ...$inserts ) ) );
 		}
-
-		foreach ( array_unique( array_map( static fn( $row ) => (int) $row[ $id_col ], $rows ) ) as $id ) {
+		foreach ( $ids as $id ) {
 			wp_cache_delete( $id, "{$entity_type}_meta" );
 		}
-		return count( $inserts );
+	}
+
+	/**
+	 * Whether a stored value (as WP would store it) equals the field default.
+	 *
+	 * @param string               $value Value as it would be stored.
+	 * @param array<string, mixed> $field Field definition.
+	 * @return bool
+	 */
+	private static function is_default( string $value, array $field ): bool {
+		return isset( $field['default'] ) && (string) maybe_serialize( $field['default'] ) === $value;
+	}
+
+	/**
+	 * Native and candidate values are equal (numeric-aware: '3' equals '3.000000').
+	 *
+	 * @param string $native    Native meta value.
+	 * @param string $candidate Value from the flat table.
+	 * @return bool
+	 */
+	private static function same_value( string $native, string $candidate ): bool {
+		return $native === $candidate
+			|| ( is_numeric( $native ) && is_numeric( $candidate ) && (float) $native === (float) $candidate );
 	}
 }

includes/migration/class-tmdo-post-migration.php

@@ -99,11 +99,12 @@ final class TMDO_Post_Migration {
 	/**
 	 * Bulk SQL pivot for one group: select managed keys from wp_postmeta,
 	 * filter by post_type, pivot via MAX(CASE) GROUP BY post_id, UPSERT
-	 * into the group's flat table.
+	 * into the group's flat table. Groups with json fields go row by row
+	 * through backfill_group_json() instead.
 	 *
-	 * @param string $group_name Entity group name (e.g. 'wc_product').
+	 * @param string $group_name Entity group name (e.g. 'hp_listing_core').
 	 * @return array{migrated:int,group:string,post_type:string|null}
-	 * @throws InvalidArgumentException When group is not registered.
+	 * @throws InvalidArgumentException When group is not registered, or is a restored orphan group.
 	 * @throws RuntimeException         When the pivot SQL fails.
 	 */
 	public static function backfill_group( string $group_name ): array {
@@ -115,8 +116,30 @@ final class TMDO_Post_Migration {
 				'Unknown post entity group: ' . esc_html( $group_name )
 			);
 		}
+		if ( ! in_array( $group_name, self::backfillable_groups(), true ) ) {
+			throw new InvalidArgumentException(
+				'Orphan post group, its values live only in the flat table: ' . esc_html( $group_name )
+			);
+		}
+
+		$post_type = self::group_post_type( $group_name );
+
+		// json values need PHP-level unserialize → json encode, which the bulk
+		// pivot below cannot do: backfill such groups row by row instead.
+		if ( in_array( 'json', array_column( $fields, 'type' ), true ) ) {
+			$result = self::backfill_group_json( $group_name, array( 'resume' => false ) );
+			if ( ! empty( $result['error'] ) || ! empty( $result['errors'] ) ) {
+				throw new RuntimeException(
+					'backfill_group failed for ' . esc_html( $group_name ) . ': ' . esc_html( (string) ( $result['error'] ?? $result['errors'] . ' row error(s)' ) )
+				);
+			}
+			return array(
+				'migrated'  => (int) $result['migrated'],
+				'group'     => $group_name,
+				'post_type' => $post_type,
+			);
+		}
 
-		$post_type  = self::group_post_type( $group_name );
 		$flat_table = TMDO_Schema_Manager::get_table_name( self::ENTITY_TYPE, $group_name );
 
 		// Introspect target table columns so we only pivot fields that actually
@@ -131,16 +154,10 @@ final class TMDO_Post_Migration {
 		}
 
 		// Build column list and CASE expressions.
-		// Skip json/textarea types from the bulk pivot — those need row-by-row
-		// unserialize handling (deferred to v2.9.4 backfill_unserialize phase).
 		$columns      = array();
 		$cases        = array();
 		$update_parts = array();
 		foreach ( $fields as $field ) {
-			$type = $field['type'] ?? 'text';
-			if ( 'json' === $type ) {
-				continue;
-			}
 			$col = TMDO_Schema_Manager::sanitize_column_name( $field['key'] );
 			if ( ! isset( $existing_cols[ $col ] ) ) {
 				continue; // Column not present in this table — skip silently.
@@ -228,6 +245,10 @@ final class TMDO_Post_Migration {
 				'Refusing post cleanup — mode is ' . esc_html( $mode ) . ', must be aeav_only'
 			);
 		}
+		$guarded = TMDO_Promotion_Guard::check_cleanup( self::ENTITY_TYPE );
+		if ( $guarded ) {
+			throw new RuntimeException( esc_html( $guarded->get_error_message() ) );
+		}
 
 		global $wpdb;
 		$keys = self::get_managed_keys();
@@ -532,6 +553,17 @@ final class TMDO_Post_Migration {
 	// Helpers
 	// ─────────────────────────────────────────────────────────────────────────
 
+	/**
+	 * Registered post groups that can be backfilled from wp_postmeta. Orphan
+	 * groups restored from wpdo_registry_meta are left out: their values live
+	 * only in the flat table.
+	 *
+	 * @return string[]
+	 */
+	public static function backfillable_groups(): array {
+		return TMDO_Entity_Migration_Engine::backfillable_groups( self::ENTITY_TYPE );
+	}
+
 	/**
 	 * All meta_keys registered for any post entity group.
 	 *

includes/migration/phases/class-tmdo-phase-cleanup.php

@@ -46,6 +46,10 @@ class TMDO_Phase_Cleanup extends TMDO_Migration_Phase_Base {
 		if ( TMDO_Mode_Manager::MODE_AEAV_ONLY !== $mode ) {
 			throw new \RuntimeException( "Refusing cleanup — mode is {$mode}, must be aeav_only" );
 		}
+		$guarded = TMDO_Promotion_Guard::check_cleanup( $this->entity_type );
+		if ( $guarded ) {
+			throw new \RuntimeException( $guarded->get_error_message() );
+		}
 		if ( ! empty( $job['options']['auto_backup'] ) && empty( $job['backup_path'] ) ) {
 			throw new \RuntimeException( 'Refusing cleanup — auto_backup requested but no backup_path on record' );
 		}

includes/query/class-tmdo-post-query-router.php

@@ -16,21 +16,27 @@
  * Hook order:
  *   1. pre_get_posts  — strip registered keys from meta_query, store in
  *                       $query->set( 'wpdo_post_clauses', $routed )
- *   2. posts_join     — LEFT JOIN wp_wpdo_post_<group> per routed post_type
+ *   2. posts_join     — LEFT JOIN wp_wpdo_post_<group> per routed group
  *   3. posts_where    — append WHERE conditions targeting flat columns
- *   4. posts_groupby  — ensure GROUP BY posts.ID to dedup join multiplication
+ *
+ * Flat tables hold one row per post (UNIQUE post_id), so the joins never
+ * multiply rows and no GROUP BY is added.
  *
  * Status / date on the flat table (O-1): when the group's post_status /
  * post_date copies are ready (TMDO_Post_Status_Sync) and none is missing,
  * a single-post-type search with explicit statuses and date ordering
- * INNER JOINs the table, filters the copies, orders by the copied
- * post_date and skips GROUP BY (one row per post), so MySQL can walk
- * `idx_post_status_date` and stop at the LIMIT.
+ * INNER JOINs the table, filters the copies and orders by the copied
+ * post_date (ID tie-breaks read as the flat post_id), so MySQL can walk
+ * `idx_post_status_date_id` and stop at the LIMIT. Not with NOT EXISTS:
+ * posts without a flat row must still match.
  *
  * Found rows (O-4): routed searches drop SQL_CALC_FOUND_ROWS (it counts every
  * match inside the page query); found_posts_query answers from a COUNT of the
- * same query, kept in the object cache until posts' last_changed moves (core
- * post saves, and flat writes via TMDO_Hook_Bus).
+ * same query, kept in the object cache until a post is saved or deleted, a
+ * flat write goes through TMDO_Hook_Bus (bump_count_version()) or terms'
+ * last_changed moves. Not posts' last_changed: WordPress moves it on any post
+ * meta write, which themes do on page views (Blocksy's dynamic CSS), and a
+ * routed search reads no unmanaged meta.
  *
  * 🔒 v2.9.x → v2.10.x frozen contract: never touches user entity. Routes
  * only entity_type='post'.
@@ -58,12 +64,24 @@ class TMDO_Post_Query_Router {
 	/** Query var holding the status / date copy route, when one applies. */
 	private const COPY_VAR = 'wpdo_post_copy_route';
 
+	/** Query var holding the flat column a routed meta orderby sorts on. */
+	private const SORT_VAR = 'wpdo_post_sort';
+
 	/** Query var holding the COUNT for found_posts_query. */
 	private const COUNT_VAR = 'wpdo_post_count_sql';
 
 	/** Object cache group for found-rows counts. */
 	private const COUNT_CACHE_GROUP = 'tmdo_found_rows';
 
+	/** The last_changed group the cached counts follow (bump_count_version()). */
+	public const COUNT_VERSION_GROUP = 'tmdo_posts';
+
+	/** Seconds a "every post of the type has a flat row" answer is reused. */
+	private const COVERAGE_TTL = 900;
+
+	/** Comparison operators the router can express on a flat column. */
+	private const COMPARES = array( '=', '!=', '<>', '<', '<=', '>', '>=', 'IN', 'NOT IN', 'LIKE', 'NOT LIKE', 'BETWEEN', 'NOT BETWEEN', 'EXISTS', 'NOT EXISTS' );
+
 	/**
 	 * Per-request answer to "are this group's copies usable?".
 	 *
@@ -77,13 +95,40 @@ class TMDO_Post_Query_Router {
 	 * @return void
 	 */
 	public function register_hooks(): void {
-		add_action( 'pre_get_posts', array( $this, 'pre_get_posts' ), 10, 1 );
+		// Late, so meta clauses other plugins add at the default priority
+		// (e.g. HivePress search filters and sorting) are already in the query.
+		add_action( 'pre_get_posts', array( $this, 'pre_get_posts' ), 1000, 1 );
 		add_filter( 'posts_join', array( $this, 'posts_join' ), 10, 2 );
 		add_filter( 'posts_where', array( $this, 'posts_where' ), 10, 2 );
-		add_filter( 'posts_groupby', array( $this, 'posts_groupby' ), 10, 2 );
 		add_filter( 'posts_orderby', array( $this, 'posts_orderby' ), 10, 2 );
 		add_filter( 'posts_request', array( $this, 'posts_request' ), 10, 2 );
+		add_filter( 'split_the_query', array( $this, 'split_the_query' ), 10, 4 );
+		add_filter( 'posts_request_ids', array( $this, 'posts_request' ), 10, 2 );
 		add_filter( 'found_posts_query', array( $this, 'found_posts_query' ), 10, 2 );
+		add_action( 'wp_insert_post', array( $this, 'add_flat_rows' ), 10, 3 );
+	}
+
+	/**
+	 * A new post of a type with its own groups gets an empty row in each, so
+	 * that "every post of the type has a flat row" keeps holding and sort-only
+	 * searches can drive from the flat table (see flat_first()).
+	 *
+	 * @param int      $post_id Post ID.
+	 * @param \WP_Post $post    Post.
+	 * @param bool     $update  Whether an existing post was updated.
+	 * @return void
+	 */
+	public function add_flat_rows( $post_id, $post, $update ): void {
+		if ( $update || ! $post instanceof \WP_Post ) {
+			return;
+		}
+		global $wpdb;
+		foreach ( TMDO_Post_Fields::groups_for_post_type( $post->post_type ) as $group ) {
+			$table = TMDO_Schema_Manager::get_table_name( 'post', $group );
+			if ( TMDO_Schema_Manager::table_exists( $table ) ) {
+				$wpdb->query( $wpdb->prepare( "INSERT IGNORE INTO `{$table}` (`post_id`) VALUES (%d)", (int) $post_id ) ); // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching,WordPress.DB.PreparedSQL.InterpolatedNotPrepared
+			}
+		}
 	}
 
 	/**
@@ -103,60 +148,126 @@ class TMDO_Post_Query_Router {
 			return;
 		}
 
+		// One post type only: with several, a clause may belong to one type's
+		// group and the others must still match through wp_postmeta.
 		$post_types = (array) $query->get( 'post_type' );
-		if ( empty( $post_types ) ) {
+		if ( 1 !== count( $post_types ) ) {
 			return;
 		}
+		$pt = (string) reset( $post_types );
 
 		$raw_meta_query = (array) $query->get( 'meta_query' );
-		if ( empty( $raw_meta_query ) ) {
-			return;
-		}
 
+		// All or nothing: routed clauses are ANDed into the WHERE, so the
+		// query is routed only when every registered clause can be, and
+		// the remaining (unregistered) clauses are ANDed too.
+		$relation  = strtoupper( (string) ( $raw_meta_query['relation'] ?? 'AND' ) );
+		$orderby   = $query->get( 'orderby' );
+		$named     = is_array( $orderby ) ? array_keys( $orderby ) : preg_split( '/[\s,]+/', trim( (string) $orderby ) );
+		$sort_name = 1 === count( $named ) ? (string) reset( $named ) : '';
+		$direction = 'ASC' === strtoupper( (string) ( is_array( $orderby ) ? reset( $orderby ) : $query->get( 'order' ) ) ) ? 'ASC' : 'DESC';
 		$routed    = array(); // Keyed by post_type.
 		$remaining = array();
+		$sort      = array();
+
+		// meta_key + orderby meta_value(_num): native INNER JOINs the key
+		// (EXISTS) and orders by meta_value+0 (NUMERIC) or meta_value.
+		$meta_key = $query->get( 'meta_key' );
+		$take_key = is_string( $meta_key ) && in_array( $sort_name, array( 'meta_value', 'meta_value_num' ), true )
+			&& null !== self::field_for( array( 'key' => $meta_key ), $pt );
+		if ( $take_key ) {
+			$field = self::field_for( array( 'key' => $meta_key ), $pt );
+			$type  = 'meta_value_num' === $sort_name ? 'NUMERIC' : (string) $query->get( 'meta_type' );
+			$route = self::route_clause(
+				array(
+					'key'     => $meta_key,
+					'compare' => 'EXISTS',
+					'type'    => $type,
+				),
+				$field
+			);
+			if ( ! $route || ! self::sortable( $route, $field ) || '' !== $query->get( 'meta_value' ) || '' !== $query->get( 'meta_compare' ) ) {
+				return;
+			}
+			$routed[ $pt ][] = $route;
+			$sort            = self::sort_for( $pt, $route, $direction );
+		}
+		// meta_key alone (no meta_value, not a meta_value sort): WP_Query adds a
+		// clause that tests the key exists — HivePress's featured-listing lookup.
+		$exists_key = ! $take_key && is_string( $meta_key ) && '' !== $meta_key
+			&& '' === (string) $query->get( 'meta_value' ) && '' === (string) $query->get( 'meta_compare' )
+			&& ! in_array( $sort_name, array( 'meta_value', 'meta_value_num' ), true )
+			&& null !== self::field_for( array( 'key' => $meta_key ), $pt );
+		if ( $exists_key ) {
+			$route = self::route_clause(
+				array(
+					'key'     => $meta_key,
+					'compare' => 'EXISTS',
+				),
+				self::field_for( array( 'key' => $meta_key ), $pt )
+			);
+			if ( ! $route ) {
+				return;
+			}
+			$routed[ $pt ][] = $route;
+		}
 
 		foreach ( $raw_meta_query as $k => $clause ) {
-			if ( 'relation' === $k || ! is_array( $clause ) || ! isset( $clause['key'] ) ) {
+			if ( 'relation' === $k || ! is_array( $clause ) ) {
+				$remaining[ $k ] = $clause;
+				continue;
+			}
+			if ( ! isset( $clause['key'] ) ) {
+				// Sort shape: matches every post, only orders by the key.
+				$name = 'AND' === $relation ? self::sort_shape( $clause ) : '';
+				if ( '' !== $name && ! in_array( $name, $named, true ) && self::field_for( $clause[ $name ], $pt ) ) {
+					continue; // Matches every post and orders nothing here (a copy of a search's meta query).
+				}
+				$field = '' !== $name && $name === $sort_name ? self::field_for( $clause[ $name ], $pt ) : null;
+				if ( $field ) {
+					$route = self::route_clause( array( 'compare' => 'EXISTS' ) + $clause[ $name ], $field );
+					if ( ! $route || ! self::sortable( $route, $field ) ) {
+						return;
+					}
+					$sort = self::sort_for( $pt, $route, $direction );
+					continue;
+				}
+				if ( self::has_registered_key( $clause, $pt ) ) {
+					return; // Nested group.
+				}
 				$remaining[ $k ] = $clause;
 				continue;
 			}
 
-			$matched = false;
-			foreach ( $post_types as $pt ) {
-				$field = TMDO_Entity_Registry::get_field( 'post', $clause['key'], (string) $pt );
-				if ( ! $field ) {
-					continue;
-				}
-				// Confirm the field's group is appropriate for this post_type:
-				// either cross-cutting wp_core (any) or the post_type-specific group.
-				$group          = $field['group'] ?? '';
-				$is_appropriate = ( 'wp_core' === $group ) || in_array( $group, TMDO_Post_Fields::groups_for_post_type( (string) $pt ), true );
-				if ( ! $is_appropriate ) {
-					continue;
-				}
-
-				$column = TMDO_Schema_Manager::sanitize_column_name( $clause['key'] );
-
-				$routed[ $pt ][] = array(
-					'group'   => $group,
-					'column'  => $column,
-					'value'   => $clause['value'] ?? '',
-					'compare' => strtoupper( trim( (string) ( $clause['compare'] ?? '=' ) ) ),
-					'type'    => strtoupper( trim( (string) ( $clause['type'] ?? 'CHAR' ) ) ),
-				);
-				$matched         = true;
-				break;
-			}
-
-			if ( ! $matched ) {
+			$field = self::field_for( $clause, $pt );
+			if ( ! $field ) {
 				$remaining[ $k ] = $clause;
+				continue;
 			}
+			$route = self::route_clause( $clause, $field );
+			if ( ! $route || 'AND' !== $relation ) {
+				return;
+			}
+			// Named by orderby: only as the sole ordering, on a column that
+			// orders like native (otherwise the name would be lost).
+			if ( is_string( $k ) && in_array( $k, $named, true ) ) {
+				if ( $k !== $sort_name || ! self::sortable( $route, $field ) ) {
+					return;
+				}
+				$sort = self::sort_for( $pt, $route, $direction );
+			}
+			$routed[ $pt ][] = $route;
 		}
 
-		if ( empty( $routed ) ) {
+		if ( empty( $routed ) && empty( $sort ) ) {
 			return;
 		}
+		if ( $take_key || $exists_key ) {
+			$query->set( 'meta_key', '' );
+		}
+		if ( $sort ) {
+			$query->set( self::SORT_VAR, $sort );
+		}
 
 		// Preserve relation if surviving clauses still have it.
 		if ( isset( $raw_meta_query['relation'] ) && ! isset( $remaining['relation'] ) ) {
@@ -173,7 +284,7 @@ class TMDO_Post_Query_Router {
 	}
 
 	/**
-	 * LEFT JOIN flat tables for each routed post_type.
+	 * LEFT JOIN the flat table of each routed group.
 	 *
 	 * @param string|null $join  Current JOIN SQL.
 	 * @param \WP_Query   $query Current WP_Query.
@@ -182,19 +293,20 @@ class TMDO_Post_Query_Router {
 	public function posts_join( ?string $join, \WP_Query $query ): string {
 		$join   = (string) ( $join ?? '' );
 		$routed = $query->get( self::QUERY_VAR );
-		if ( empty( $routed ) || ! is_array( $routed ) ) {
-			return $join;
+		$sort   = $query->get( self::SORT_VAR );
+		$pairs  = array(); // Pairs of post type and group.
+		foreach ( is_array( $routed ) ? $routed : array() as $post_type => $clauses ) {
+			foreach ( array_column( $clauses, 'group' ) as $group ) {
+				$pairs[] = array( $post_type, $group );
+			}
+		}
+		if ( ! empty( $sort ) ) {
+			$pairs[] = array( $sort['post_type'], $sort['group'] );
 		}
 
 		global $wpdb;
 
-		foreach ( $routed as $post_type => $clauses ) {
-			// Each routed clause carries its group; use the first clause's group
-			// (all clauses for a given post_type currently target one group).
-			$group = $clauses[0]['group'] ?? '';
-			if ( '' === $group ) {
-				continue;
-			}
+		foreach ( $pairs as list( $post_type, $group ) ) {
 			$table = $wpdb->prefix . 'wpdo_post_' . sanitize_key( $group );
 			$alias = self::table_alias( $post_type, $group );
 
@@ -203,6 +315,7 @@ class TMDO_Post_Query_Router {
 				continue;
 			}
 
+			// The copy route only applies to single-group searches.
 			$type  = self::copy_route_for( $query, $post_type ) ? 'INNER' : 'LEFT';
 			$join .= " {$type} JOIN `{$table}` AS `{$alias}` "
 				. "ON (`{$wpdb->posts}`.`ID` = `{$alias}`.`post_id`)";
@@ -248,7 +361,8 @@ class TMDO_Post_Query_Router {
 	}
 
 	/**
-	 * Order by the flat table's post_date copy when the copy route applies.
+	 * Order by the routed meta orderby column (ties by ID), or by the flat
+	 * table's post_date copy when the copy route applies.
 	 *
 	 * @param string|null $orderby Current ORDER BY SQL.
 	 * @param \WP_Query   $query   Current WP_Query.
@@ -256,35 +370,19 @@ class TMDO_Post_Query_Router {
 	 */
 	public function posts_orderby( ?string $orderby, \WP_Query $query ): string {
 		$orderby = (string) ( $orderby ?? '' );
-		$copy    = $query->get( self::COPY_VAR );
+		$sort    = $query->get( self::SORT_VAR );
+		if ( ! empty( $sort ) ) {
+			global $wpdb;
+			return '`' . self::table_alias( $sort['post_type'], $sort['group'] ) . '`.`' . esc_sql( $sort['column'] ) . '` '
+				. $sort['order'] . ", `{$wpdb->posts}`.`ID` DESC";
+		}
+		$copy = $query->get( self::COPY_VAR );
 		if ( empty( $copy ) ) {
 			return $orderby;
 		}
 		return '`' . self::table_alias( $copy['post_type'], $copy['group'] ) . '`.`post_date` ' . $copy['order'];
 	}
 
-	/**
-	 * Ensure GROUP BY posts.ID to deduplicate JOIN-multiplied rows.
-	 *
-	 * @param string|null $groupby Current GROUP BY SQL.
-	 * @param \WP_Query   $query   Current WP_Query.
-	 * @return string Modified GROUP BY SQL.
-	 */
-	public function posts_groupby( ?string $groupby, \WP_Query $query ): string {
-		$groupby = (string) ( $groupby ?? '' );
-		$routed  = $query->get( self::QUERY_VAR );
-		if ( empty( $routed ) || ! is_array( $routed ) || ! empty( $query->get( self::COPY_VAR ) ) ) {
-			return $groupby;
-		}
-
-		global $wpdb;
-		if ( '' === trim( $groupby ) ) {
-			$groupby = "`{$wpdb->posts}`.`ID`";
-		}
-
-		return $groupby;
-	}
-
 	/**
 	 * Drop SQL_CALC_FOUND_ROWS from a routed search; keep its COUNT for later.
 	 *
@@ -294,15 +392,61 @@ class TMDO_Post_Query_Router {
 	 */
 	public function posts_request( ?string $request, \WP_Query $query ): string {
 		$request = (string) ( $request ?? '' );
-		if ( empty( $query->get( self::QUERY_VAR ) ) || false === strpos( $request, 'SQL_CALC_FOUND_ROWS' ) ) {
+		$routed  = ! empty( $query->get( self::QUERY_VAR ) ) || ! empty( $query->get( self::SORT_VAR ) );
+		if ( ! $routed ) {
+			return $request;
+		}
+		$counted = false !== strpos( $request, 'SQL_CALC_FOUND_ROWS' );
+		$request = self::routed_request( $request, $query );
+		if ( ! $counted ) {
+			return $request;
+		}
+		global $wpdb;
+		$matches = (string) preg_replace( '/\s+LIMIT\s+\d+(\s*,\s*\d+)?\s*$/i', '', $request );
+		$not_in  = " AND {$wpdb->posts}.ID NOT IN (";
+		// post__not_in (HivePress sends a random set per page) would give every
+		// search its own cache key: count without it (cached) minus the excluded
+		// posts that match (primary-key lookups, so no forced flat-first order).
+		if ( 1 === substr_count( $matches, $not_in ) && preg_match( '/' . preg_quote( $not_in, '/' ) . '([\d,]+)\)/', $matches, $m ) ) {
+			$excluded = str_replace( $m[0], " AND {$wpdb->posts}.ID IN ({$m[1]})", (string) preg_replace( '/^SELECT STRAIGHT_JOIN /', 'SELECT ', $matches ) );
+			$query->set(
+				self::COUNT_VAR,
+				array(
+					'SELECT COUNT(*) FROM ( ' . str_replace( $m[0], '', $matches ) . ' ) AS tmdo_found',
+					"SELECT COUNT(*) FROM ( {$excluded} ) AS tmdo_found",
+				)
+			);
 			return $request;
 		}
-		$request = preg_replace( '/\bSQL_CALC_FOUND_ROWS\s+/', '', $request, 1 );
-		$matches = preg_replace( '/\s+LIMIT\s+\d+(\s*,\s*\d+)?\s*$/i', '', $request );
 		$query->set( self::COUNT_VAR, "SELECT COUNT(*) FROM ( {$matches} ) AS tmdo_found" );
 		return $request;
 	}
 
+	/**
+	 * Keep WordPress's split query (IDs first, then cached post objects) on a
+	 * routed search: posts_request only dropped SQL_CALC_FOUND_ROWS, yet
+	 * WordPress takes any change for a filtered request and selects full rows
+	 * (a temporary table sorting whole posts). The split ID request passes
+	 * through posts_request_ids, which drops SQL_CALC_FOUND_ROWS again.
+	 *
+	 * @param bool                  $split       Core decision.
+	 * @param \WP_Query             $query       Current WP_Query.
+	 * @param string                $old_request Request before posts_request.
+	 * @param array<string, string> $clauses     Query clauses (fields, limits …).
+	 * @return bool
+	 */
+	public function split_the_query( $split, \WP_Query $query, $old_request = '', $clauses = array() ): bool {
+		$routed = ! empty( $query->get( self::QUERY_VAR ) ) || ! empty( $query->get( self::SORT_VAR ) );
+		if ( $split || ! $routed ) {
+			return (bool) $split;
+		}
+		global $wpdb;
+		// Core's other conditions: full rows, and a LIMIT under 500 or an external object cache.
+		return "{$wpdb->posts}.*" === ( $clauses['fields'] ?? '' )
+			&& self::routed_request( (string) $old_request, $query ) === $query->request
+			&& ( ( '' !== ( $clauses['limits'] ?? '' ) && (int) $query->get( 'posts_per_page' ) < 500 ) || wp_using_ext_object_cache() );
+	}
+
 	/**
 	 * Answer found rows from the cached COUNT of a routed search.
 	 *
@@ -315,13 +459,21 @@ class TMDO_Post_Query_Router {
 		if ( empty( $count_sql ) ) {
 			return (string) ( $sql ?? '' );
 		}
-		$key   = md5( $count_sql ) . ':' . wp_cache_get_last_changed( 'posts' );
-		$total = wp_cache_get( $key, self::COUNT_CACHE_GROUP );
+		global $wpdb;
+		list( $count_sql, $excluded_sql ) = array_pad( (array) $count_sql, 2, '' );
+
+		// Keyword searches carry wpdb's placeholder escape for "%", which is new
+		// in every request: without it the key would never match again.
+		$stable = method_exists( $wpdb, 'remove_placeholder_escape' ) ? $wpdb->remove_placeholder_escape( $count_sql ) : $count_sql;
+		$key    = md5( $stable ) . ':' . wp_cache_get_last_changed( self::COUNT_VERSION_GROUP ) . ':' . wp_cache_get_last_changed( 'terms' );
+		$total  = wp_cache_get( $key, self::COUNT_CACHE_GROUP );
 		if ( false === $total ) {
-			global $wpdb;
 			$total = (int) $wpdb->get_var( $count_sql );
 			wp_cache_set( $key, $total, self::COUNT_CACHE_GROUP, HOUR_IN_SECONDS );
 		}
+		if ( '' !== $excluded_sql ) {
+			$total = max( 0, (int) $total - (int) $wpdb->get_var( $excluded_sql ) );
+		}
 		return 'SELECT ' . (int) $total;
 	}
 
@@ -329,6 +481,17 @@ class TMDO_Post_Query_Router {
 	// Helpers
 	// ─────────────────────────────────────────────────────────────────────────
 
+	/**
+	 * A post was saved or deleted, or a managed key written: cached routed
+	 * counts are stale. Hooked on clean_post_cache whatever the mode, so a
+	 * count cached before the router was last active is not reused.
+	 *
+	 * @return void
+	 */
+	public static function bump_count_version(): void {
+		wp_cache_set_last_changed( self::COUNT_VERSION_GROUP );
+	}
+
 	/**
 	 * Whether the router is mode-active (post mode is shadow_read or aeav_only).
 	 *
@@ -350,6 +513,57 @@ class TMDO_Post_Query_Router {
 		self::$copies_usable = array();
 	}
 
+	/**
+	 * Every post of the type has a row in the group's flat table. One
+	 * anti-join per group, reused for COVERAGE_TTL and per post-mode change.
+	 * A post inserted by direct SQL (no wp_insert_post) is seen at the next
+	 * check at the latest; the `tmdo_router_flat_first` filter turns the
+	 * flat-first route off.
+	 *
+	 * @param string $post_type Post type.
+	 * @param string $group     Entity group name.
+	 * @return bool
+	 */
+	private static function covers_all( string $post_type, string $group ): bool {
+		$key = self::coverage_key( $post_type, $group );
+		$hit = get_transient( $key );
+		if ( false === $hit ) {
+			global $wpdb;
+			$table   = TMDO_Schema_Manager::get_table_name( 'post', $group );
+			$missing = $wpdb->get_var( $wpdb->prepare( "SELECT 1 FROM {$wpdb->posts} p LEFT JOIN `{$table}` f ON f.post_id = p.ID WHERE p.post_type = %s AND f.post_id IS NULL LIMIT 1", $post_type ) ); // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching,WordPress.DB.PreparedSQL.InterpolatedNotPrepared
+			$hit     = null === $missing ? 'yes' : 'no';
+			set_transient( $key, $hit, self::COVERAGE_TTL );
+		}
+		return 'yes' === $hit;
+	}
+
+	/**
+	 * Forget every cached coverage answer (tests, or after bulk writes that
+	 * bypass wp_insert_post).
+	 *
+	 * @return void
+	 */
+	public static function forget_coverage(): void {
+		foreach ( TMDO_Entity_Registry::get_groups_for_type( 'post' ) as $group ) {
+			foreach ( TMDO_Entity_Registry::get_group_post_types( 'post', $group ) as $post_type ) {
+				delete_transient( self::coverage_key( $post_type, $group ) );
+			}
+		}
+	}
+
+	/**
+	 * Transient name of a coverage answer; a post-mode change starts a new one.
+	 *
+	 * @param string $post_type Post type.
+	 * @param string $group     Entity group name.
+	 * @return string
+	 */
+	private static function coverage_key( string $post_type, string $group ): string {
+		$entered = get_option( TMDO_Mode_Manager::OPT_ENTERED_AT, array() );
+		$since   = is_array( $entered ) ? (int) ( $entered['post'] ?? 0 ) : 0;
+		return 'tmdo_cov_' . md5( "{$post_type}:{$group}:{$since}" );
+	}
+
 	/**
 	 * The status / date copy route for a routed query, or [] when it does not apply.
 	 *
@@ -363,7 +577,8 @@ class TMDO_Post_Query_Router {
 		}
 		$post_type = (string) array_key_first( $routed );
 		$groups    = array_values( array_unique( array_column( $routed[ $post_type ], 'group' ) ) );
-		if ( 1 !== count( $groups ) || ! in_array( $query->get( 'orderby' ), array( '', 'date', 'post_date' ), true ) ) {
+		if ( 1 !== count( $groups ) || ! in_array( $query->get( 'orderby' ), array( '', 'date', 'post_date' ), true )
+			|| in_array( 'NOT EXISTS', array_column( $routed[ $post_type ], 'compare' ), true ) ) {
 			return array();
 		}
 		$statuses = $query->get( 'post_status' );
@@ -411,6 +626,349 @@ class TMDO_Post_Query_Router {
 		return self::$copies_usable[ $group ];
 	}
 
+	/**
+	 * The registered field a clause targets for this post type, or null.
+	 *
+	 * @param array<string, mixed> $clause    Meta query clause.
+	 * @param string               $post_type Post type slug.
+	 * @return array<string, mixed>|null
+	 */
+	private static function field_for( array $clause, string $post_type ): ?array {
+		if ( ! is_string( $clause['key'] ?? null ) || ! in_array( $clause['compare_key'] ?? '=', array( '=', '' ), true ) ) {
+			return null;
+		}
+		$field = TMDO_Entity_Registry::get_field( 'post', $clause['key'], $post_type );
+		if ( ! $field ) {
+			return null;
+		}
+		// Either cross-cutting wp_core or one of the post type's own groups.
+		$group = $field['group'] ?? '';
+		return ( 'wp_core' === $group || in_array( $group, TMDO_Post_Fields::groups_for_post_type( $post_type ), true ) ) ? $field : null;
+	}
+
+	/**
+	 * Whether a nested meta query group references a registered key.
+	 *
+	 * @param array<int|string, mixed> $group     Nested group.
+	 * @param string                   $post_type Post type slug.
+	 * @return bool
+	 */
+	private static function has_registered_key( array $group, string $post_type ): bool {
+		foreach ( $group as $clause ) {
+			if ( ! is_array( $clause ) ) {
+				continue;
+			}
+			if ( isset( $clause['key'] ) ? null !== self::field_for( $clause, $post_type ) : self::has_registered_key( $clause, $post_type ) ) {
+				return true;
+			}
+		}
+		return false;
+	}
+
+	/**
+	 * The last `wp tmdo drift-check` found the group out of step with native
+	 * meta. A group never checked keeps routing, and so does every group in
+	 * aeav_only, where native is stale by design and no fallback.
+	 *
+	 * @param string $group Entity group name.
+	 * @return bool
+	 */
+	private static function drifting( string $group ): bool {
+		if ( TMDO_Mode_Manager::MODE_AEAV_ONLY === TMDO_Mode_Manager::get( 'post' ) ) {
+			return false;
+		}
+		if ( TMDO_Schema_Manager::is_deferred( 'post', $group ) ) {
+			return true; // Table upgrade waiting for WP-CLI / WP-Cron.
+		}
+		$status = get_option( TMDO_Drift_Check::OPTION, array() );
+		$last   = is_array( $status ) ? ( $status['post'][ $group ] ?? null ) : null;
+		return is_array( $last ) && (int) ( $last['miss'] ?? 0 ) + (int) ( $last['diff'] ?? 0 ) + (int) ( $last['extra'] ?? 0 ) > 0;
+	}
+
+	/**
+	 * The routed form of a clause, or null when the flat column would not
+	 * compare the way WordPress compares the meta_value string, or when the
+	 * group is known to drift from native meta.
+	 *
+	 * Native casts meta_value by the clause type (CHAR when absent); flat
+	 * columns are typed. Routed: EXISTS / NOT EXISTS; string columns with
+	 * CHAR; numeric columns with a numeric type (no LIKE); integer columns
+	 * with CHAR =, !=, IN, NOT IN on plain integers ("10" = "10" either way).
+	 *
+	 * @param array<string, mixed> $clause Meta query clause.
+	 * @param array<string, mixed> $field  Registered field.
+	 * @return array{group:string, column:string, value:mixed, compare:string, type:string}|null
+	 */
+	private static function route_clause( array $clause, array $field ): ?array {
+		$compare = strtoupper( trim( (string) ( $clause['compare'] ?? '=' ) ) );
+		// Without 'value', WP_Meta_Query checks only that the key exists (it adds a
+		// value condition only when one is set): HivePress's featured-listing
+		// lookup, run on every search page, is array( 'key' => 'hp_featured' ).
+		if ( ! array_key_exists( 'value', $clause ) && ! in_array( $compare, array( 'EXISTS', 'NOT EXISTS' ), true ) ) {
+			$compare = 'EXISTS';
+		}
+		$type  = strtoupper( trim( (string) ( $clause['type'] ?? '' ) ) );
+		$type  = '' === $type ? 'CHAR' : $type;
+		$value = $clause['value'] ?? '';
+		$kind  = $field['type'] ?? 'text';
+		$multi = in_array( $compare, array( 'IN', 'NOT IN', 'BETWEEN', 'NOT BETWEEN' ), true );
+
+		if ( ! in_array( $compare, self::COMPARES, true ) || ( ! $multi && is_array( $value ) ) ) {
+			return null;
+		}
+
+		$numeric_type = self::is_numeric_type( $type );
+		if ( in_array( $compare, array( 'EXISTS', 'NOT EXISTS' ), true ) ) {
+			$ok = in_array( $kind, array( 'text', 'textarea', 'enum', 'integer', 'decimal', 'boolean' ), true );
+		} elseif ( in_array( $kind, array( 'text', 'textarea', 'enum' ), true ) ) {
+			$ok = 'CHAR' === $type;
+		} elseif ( in_array( $kind, array( 'integer', 'decimal', 'boolean' ), true ) && $numeric_type ) {
+			$ok = ! in_array( $compare, array( 'LIKE', 'NOT LIKE' ), true );
+		} else {
+			$ok = in_array( $kind, array( 'integer', 'boolean' ), true ) && 'CHAR' === $type
+				&& in_array( $compare, array( '=', '!=', '<>', 'IN', 'NOT IN' ), true )
+				&& array() === array_filter( (array) $value, static fn( $v ) => ! is_scalar( $v ) || (string) (int) $v !== (string) $v );
+		}
+		if ( ! $ok || self::drifting( (string) $field['group'] ) ) {
+			return null;
+		}
+
+		return array(
+			'group'   => (string) $field['group'],
+			'column'  => TMDO_Schema_Manager::sanitize_column_name( $clause['key'] ),
+			'value'   => $value,
+			'compare' => $compare,
+			'type'    => $type,
+		);
+	}
+
+	/**
+	 * What posts_request makes of a routed request.
+	 *
+	 * @param string    $request SELECT statement.
+	 * @param \WP_Query $query   Current WP_Query.
+	 * @return string
+	 */
+	private static function routed_request( string $request, \WP_Query $query ): string {
+		return self::copy_ordered( self::flat_first( self::without_found_rows( $request ), $query ), $query );
+	}
+
+	/**
+	 * The copy route's request without WordPress's GROUP BY (when the flat row
+	 * is the only join) and with posts.ID tie-breaks read as the flat post_id,
+	 * each in its own direction, once. MariaDB then walks the
+	 * (post_status, post_date, post_id) index and stops at the LIMIT instead
+	 * of sorting every match (dev36, 235k of 1.3M listings: 1.7 s → 3 ms).
+	 *
+	 * @param string    $request SELECT statement.
+	 * @param \WP_Query $query   Current WP_Query.
+	 * @return string
+	 */
+	private static function copy_ordered( string $request, \WP_Query $query ): string {
+		$copy = $query->get( self::COPY_VAR );
+		if ( empty( $copy ) ) {
+			return $request;
+		}
+		global $wpdb;
+		$tie = '`' . self::table_alias( $copy['post_type'], $copy['group'] ) . '`.`post_id` ';
+		return (string) preg_replace_callback(
+			'/\bORDER BY\b(?!.*\bORDER BY\b).*$/s',
+			static function ( $m ) use ( $wpdb, $tie ) {
+				$order = (string) preg_replace_callback(
+					'/`?' . preg_quote( $wpdb->posts, '/' ) . '`?\.`?ID`?(?!\w)(?:\s+(ASC|DESC)\b)?/i',
+					static fn( $id ) => $tie . ( 'DESC' === strtoupper( $id[1] ?? '' ) ? 'DESC' : 'ASC' ),
+					$m[0]
+				);
+				return (string) preg_replace( '/(,\s*' . preg_quote( $tie, '/' ) . '(ASC|DESC))(\s*,\s*' . preg_quote( $tie, '/' ) . '\2)+/', '$1', $order );
+			},
+			self::without_group_by( $request )
+		);
+	}
+
+	/**
+	 * WordPress groups by posts.ID for any tax or meta query. With a flat row
+	 * (one per post) as the only join there is nothing to collapse, and the
+	 * GROUP BY makes MySQL sort the whole match in a temporary table
+	 * (WooCommerce's product_visibility NOT IN on searches is a subquery).
+	 *
+	 * @param string $request SELECT statement.
+	 * @return string
+	 */
+	private static function without_group_by( string $request ): string {
+		global $wpdb;
+		if ( 1 !== preg_match_all( '/\bJOIN\b/i', $request ) ) {
+			return $request;
+		}
+		return (string) preg_replace( '/\s+GROUP BY\s+`?' . preg_quote( $wpdb->posts, '/' ) . '`?\.`?ID`?(?=\s)/', ' ', $request, 1 );
+	}
+
+	/**
+	 * Drive a filtered search ordered by a flat column from its flat table.
+	 *
+	 * MariaDB starts from wp_posts (the type / status index), looks every
+	 * candidate up in the flat table and sorts in a temporary table. From the
+	 * flat table, with the posts.ID tie-break read as the equal flat post_id,
+	 * it sorts one table (dev36, 100k listings: meta_value_num 263 → 147 ms,
+	 * HivePress sort + filter 300 → 36 ms). Only when the routed conditions
+	 * already require a flat row (LEFT JOIN = INNER JOIN), all on the sort
+	 * group, without a selective post filter; `tmdo_router_flat_first` can
+	 * turn it off.
+	 *
+	 * @param string    $request SELECT statement.
+	 * @param \WP_Query $query   Current WP_Query.
+	 * @return string
+	 */
+	private static function flat_first( string $request, \WP_Query $query ): string {
+		$routed = $query->get( self::QUERY_VAR );
+		$sort   = $query->get( self::SORT_VAR );
+		if ( empty( $sort ) || ! is_array( $sort ) || ! empty( $query->get( self::COPY_VAR ) ) ) {
+			return $request;
+		}
+		if ( empty( $routed ) || ! is_array( $routed ) ) {
+			// Sort only: the LEFT JOIN keeps posts without a flat row, so the
+			// flat table may drive only when every post of the type has one.
+			$post_type = (string) $sort['post_type'];
+			$group     = (string) $sort['group'];
+			if ( ! self::covers_all( $post_type, $group ) ) {
+				return $request;
+			}
+		} else {
+			$post_type = (string) array_key_first( $routed );
+			$groups    = array_unique( array_column( $routed[ $post_type ], 'group' ) );
+			$compares  = array_diff( array_column( $routed[ $post_type ], 'compare' ), array( 'NOT EXISTS' ) );
+			if ( 1 !== count( $groups ) || empty( $compares ) || $sort['group'] !== $groups[0] ) {
+				return $request;
+			}
+			$group = (string) $groups[0];
+		}
+		foreach ( array( 'p', 'page_id', 'name', 'pagename', 'attachment_id', 'post__in', 'post_parent', 'post_parent__in', 'author', 'author__in', 'author_name' ) as $var ) {
+			if ( ! empty( $query->get( $var ) ) ) {
+				return $request;
+			}
+		}
+		if ( ! apply_filters( 'tmdo_router_flat_first', true, $query ) ) {
+			return $request;
+		}
+
+		global $wpdb;
+		$table = $wpdb->prefix . 'wpdo_post_' . sanitize_key( $group );
+		$alias = self::table_alias( $post_type, $group );
+		$on    = "(`{$wpdb->posts}`.`ID` = `{$alias}`.`post_id`)";
+		$join  = " LEFT JOIN `{$table}` AS `{$alias}` ON {$on}";
+		if ( 1 !== substr_count( $request, $join ) ) {
+			return $request;
+		}
+		$flat_first = preg_replace(
+			'/\bFROM\s+' . preg_quote( $wpdb->posts, '/' ) . '\b/',
+			"FROM `{$table}` AS `{$alias}` INNER JOIN {$wpdb->posts} ON {$on}",
+			str_replace( $join, '', $request ),
+			1,
+			$replaced
+		);
+		if ( 1 !== $replaced ) {
+			return $request;
+		}
+		$flat_first = self::without_group_by( (string) $flat_first );
+		// Tie-breaks on posts.ID (ours, and any a plugin appended) read the flat
+		// post_id, once, in the sort's direction: a (column, post_id) index then
+		// returns rows in order with no filesort. Ties are ordered by ID the same
+		// way as the column (natively ID DESC); pagination stays stable.
+		$tie        = "`{$alias}`.`post_id` " . ( 'ASC' === strtoupper( (string) $sort['order'] ) ? 'ASC' : 'DESC' );
+		$flat_first = preg_replace_callback(
+			'/\bORDER BY\b(?!.*\bORDER BY\b).*$/s',
+			static function ( $m ) use ( $wpdb, $tie ) {
+				$order = (string) preg_replace( '/`?' . preg_quote( $wpdb->posts, '/' ) . '`?\.`?ID`?(?!\w)(\s+(ASC|DESC)\b)?/i', $tie, $m[0] );
+				return (string) preg_replace( '/(,\s*' . preg_quote( $tie, '/' ) . ')(\s*,\s*' . preg_quote( $tie, '/' ) . ')+/', '$1', $order );
+			},
+			(string) $flat_first
+		);
+		return (string) preg_replace( '/^\s*SELECT\s/', 'SELECT STRAIGHT_JOIN ', (string) $flat_first, 1 );
+	}
+
+	/**
+	 * A request without its SQL_CALC_FOUND_ROWS.
+	 *
+	 * @param string $request SELECT statement.
+	 * @return string
+	 */
+	private static function without_found_rows( string $request ): string {
+		return (string) preg_replace( '/\bSQL_CALC_FOUND_ROWS\s+/', '', $request, 1 );
+	}
+
+	/**
+	 * Whether a meta query type casts to a number (NUMERIC, SIGNED, DECIMAL(p,s) …).
+	 *
+	 * @param string $type Upper-cased clause type.
+	 * @return bool
+	 */
+	private static function is_numeric_type( string $type ): bool {
+		return 1 === preg_match( '/^(NUMERIC|SIGNED|UNSIGNED|DECIMAL)(\(\d+(,\s?\d+)?\))?$/', $type );
+	}
+
+	/**
+	 * Whether ordering by the flat column matches native ordering by
+	 * CAST(meta_value AS type): numbers by a numeric type, strings by CHAR.
+	 *
+	 * @param array{type:string}   $route Routed clause.
+	 * @param array<string, mixed> $field Registered field.
+	 * @return bool
+	 */
+	private static function sortable( array $route, array $field ): bool {
+		$kind = $field['type'] ?? 'text';
+		if ( in_array( $kind, array( 'integer', 'decimal', 'boolean' ), true ) ) {
+			return self::is_numeric_type( $route['type'] );
+		}
+		return in_array( $kind, array( 'text', 'textarea', 'enum' ), true ) && 'CHAR' === $route['type'];
+	}
+
+	/**
+	 * The ordering a routed meta orderby resolves to.
+	 *
+	 * @param string                             $post_type Post type slug.
+	 * @param array{group:string, column:string} $route     Routed clause.
+	 * @param string                             $direction ASC or DESC.
+	 * @return array{post_type:string, group:string, column:string, order:string}
+	 */
+	private static function sort_for( string $post_type, array $route, string $direction ): array {
+		return array(
+			'post_type' => $post_type,
+			'group'     => $route['group'],
+			'column'    => $route['column'],
+			'order'     => $direction,
+		);
+	}
+
+	/**
+	 * The clause name of a "sort by a key, keep posts without it" group —
+	 * relation OR of exactly NOT EXISTS and EXISTS on one key and type, one
+	 * of them named (HivePress search sorting) — or '' for any other group.
+	 *
+	 * @param array<int|string, mixed> $group Nested meta query group.
+	 * @return string
+	 */
+	private static function sort_shape( array $group ): string {
+		if ( 'OR' !== strtoupper( (string) ( $group['relation'] ?? '' ) ) ) {
+			return '';
+		}
+		unset( $group['relation'] );
+		if ( 2 !== count( $group ) ) {
+			return '';
+		}
+		$name     = '';
+		$compares = array();
+		foreach ( $group as $k => $clause ) {
+			if ( ! is_array( $clause ) || ! is_string( $clause['key'] ?? null ) ) {
+				return '';
+			}
+			$compares[] = strtoupper( (string) ( $clause['compare'] ?? '=' ) );
+			$name       = is_string( $k ) ? $k : $name;
+		}
+		list( $a, $b ) = array_values( $group );
+		sort( $compares );
+		$same = $a['key'] === $b['key'] && strtoupper( (string) ( $a['type'] ?? '' ) ) === strtoupper( (string) ( $b['type'] ?? '' ) );
+		return array( 'EXISTS', 'NOT EXISTS' ) === $compares && $same ? $name : '';
+	}
+
 	/**
 	 * Generate a deterministic JOIN alias for a (post_type, group) pair.
 	 *
@@ -429,9 +987,8 @@ class TMDO_Post_Query_Router {
 	 * @return string Sanitized operator (defaults to '=').
 	 */
 	private static function sanitize_compare( string $compare ): string {
-		$allowed = array( '=', '!=', '<>', '<', '<=', '>', '>=', 'IN', 'NOT IN', 'LIKE', 'NOT LIKE', 'BETWEEN', 'NOT BETWEEN', 'EXISTS', 'NOT EXISTS' );
 		$compare = strtoupper( trim( $compare ) );
-		return in_array( $compare, $allowed, true ) ? $compare : '=';
+		return in_array( $compare, self::COMPARES, true ) ? $compare : '=';
 	}
 
 	/**
@@ -468,6 +1025,10 @@ class TMDO_Post_Query_Router {
 			return ' AND ' . $col_sql . ' ' . $op;
 		}
 
+		if ( in_array( $compare, array( 'LIKE', 'NOT LIKE' ), true ) ) {
+			$value = '%' . $wpdb->esc_like( (string) $value ) . '%';
+		}
+
 		return ' AND ' . $col_sql . ' ' . $compare . ' ' . $wpdb->prepare( '%s', (string) $value );
 	}
 }

includes/snapshots/class-tmdo-snapshot-manager.php

@@ -310,7 +310,7 @@ class TMDO_Snapshot_Manager {
 		}
 		$table   = $wpdb->prefix . self::TABLE_SLUG;
 		$deleted = $wpdb->delete( $table, array( 'snapshot_id' => $snapshot_id ), array( '%s' ) ); // phpcs:ignore WordPress.DB
-		TMDO_Logger::info( 'snapshot_deleted', array( 'snapshot_id' => $snapshot_id ) );
+		TMDO_Logger::notice( 'snapshot_deleted', array( 'snapshot_id' => $snapshot_id ) );
 		return false !== $deleted;
 	}
 

includes/zones/class-tmdo-zone-cold.php

@@ -25,6 +25,9 @@ if ( ! defined( 'ABSPATH' ) ) {
  */
 class TMDO_Zone_Cold {
 
+	/** Option: post type → cold cache version (TMDO_Cache_Layer::flush_group()). */
+	public const CACHE_VERSION_OPTION = 'wpdo_cold_cache_version';
+
 	/**
 	 * Get the cold table name for a post type.
 	 *
@@ -45,6 +48,21 @@ class TMDO_Zone_Cold {
 		return 'wpdo_cold_' . sanitize_key( $post_type );
 	}
 
+	/**
+	 * Object-cache key of a post's cold blob. It carries the post type's cache
+	 * version once TMDO_Cache_Layer::flush_group() has bumped it (none before,
+	 * so existing entries keep their keys).
+	 *
+	 * @param int    $post_id   Post ID.
+	 * @param string $post_type Post type slug.
+	 * @return string
+	 */
+	public static function cache_key( int $post_id, string $post_type ): string {
+		$versions = get_option( self::CACHE_VERSION_OPTION, array() );
+		$version  = is_array( $versions ) ? (int) ( $versions[ $post_type ] ?? 0 ) : 0;
+		return $version ? "cold_{$post_id}_v{$version}" : "cold_{$post_id}";
+	}
+
 	/**
 	 * Ensure the cold table exists for a post type.
 	 *
@@ -92,7 +110,7 @@ class TMDO_Zone_Cold {
 	 */
 	public static function get_blob( int $post_id, string $post_type ): array {
 		$group     = self::cache_group( $post_type );
-		$cache_key = "cold_{$post_id}";
+		$cache_key = self::cache_key( $post_id, $post_type );
 
 		$cached = wp_cache_get( $cache_key, $group );
 		if ( false !== $cached ) {
@@ -202,7 +220,7 @@ class TMDO_Zone_Cold {
 		);
 		// phpcs:enable WordPress.DB.PreparedSQL.InterpolatedNotPrepared,WordPress.DB.DirectDatabaseQuery,WordPress.DB.DirectDatabaseQuery.NoCaching
 
-		wp_cache_delete( "cold_{$post_id}", self::cache_group( $post_type ) );
+		wp_cache_delete( self::cache_key( $post_id, $post_type ), self::cache_group( $post_type ) );
 	}
 
 	/**
@@ -215,7 +233,7 @@ class TMDO_Zone_Cold {
 	public static function delete( int $post_id, string $post_type ): void {
 		global $wpdb;
 		$wpdb->delete( self::table( $post_type ), array( 'post_id' => $post_id ), array( '%d' ) );
-		wp_cache_delete( "cold_{$post_id}", self::cache_group( $post_type ) );
+		wp_cache_delete( self::cache_key( $post_id, $post_type ), self::cache_group( $post_type ) );
 	}
 
 	// ── Private helpers ───────────────────────────────────────────────────
@@ -264,7 +282,7 @@ class TMDO_Zone_Cold {
 		);
 
 		// Invalidate object cache.
-		wp_cache_delete( "cold_{$post_id}", self::cache_group( $post_type ) );
+		wp_cache_delete( self::cache_key( $post_id, $post_type ), self::cache_group( $post_type ) );
 	}
 
 	/**
@@ -305,6 +323,6 @@ class TMDO_Zone_Cold {
 		);
 		// phpcs:enable WordPress.DB.PreparedSQL.InterpolatedNotPrepared,WordPress.DB.DirectDatabaseQuery,WordPress.DB.DirectDatabaseQuery.NoCaching
 
-		wp_cache_delete( "cold_{$post_id}", self::cache_group( $post_type ) );
+		wp_cache_delete( self::cache_key( $post_id, $post_type ), self::cache_group( $post_type ) );
 	}
 }

includes/zones/class-tmdo-zone-router.php

@@ -104,7 +104,10 @@ class TMDO_Zone_Router {
 	 *
 	 * Callers only need post_id and post_type; zone enumeration and per-zone
 	 * error isolation are handled here. Hot and Cold are skipped when the
-	 * post_type has no registered fields in that zone (table may not exist).
+	 * post_type has no registered fields in that zone, or when the zone table
+	 * was never created (fields are registered long before a module runs).
+	 * Module state is not checked: a table left by a rolled-back module still
+	 * gets its rows for deleted posts removed.
 	 *
 	 * @param int    $post_id   Post ID being deleted.
 	 * @param string $post_type Post type slug.
@@ -113,7 +116,7 @@ class TMDO_Zone_Router {
 	public static function delete_post( int $post_id, string $post_type ): void {
 		$registry = TMDO_Schema_Registry::instance();
 
-		if ( ! empty( $registry->get_hot_columns( $post_type ) ) ) {
+		if ( ! empty( $registry->get_hot_columns( $post_type ) ) && TMDO_Schema_Manager::table_exists( TMDO_Zone_Hot::table( $post_type ) ) ) {
 			try {
 				TMDO_Zone_Hot::delete( $post_id, $post_type );
 			} catch ( \Throwable $e ) {
@@ -121,7 +124,7 @@ class TMDO_Zone_Router {
 			}
 		}
 
-		if ( ! empty( $registry->get_cold_meta_keys( $post_type ) ) ) {
+		if ( ! empty( $registry->get_cold_meta_keys( $post_type ) ) && TMDO_Schema_Manager::table_exists( TMDO_Zone_Cold::table( $post_type ) ) ) {
 			try {
 				TMDO_Zone_Cold::delete( $post_id, $post_type );
 			} catch ( \Throwable $e ) {

readme.txt

@@ -4,7 +4,7 @@ Tags: performance, database, postmeta, optimization, hivepress
 Requires at least: 6.0
 Tested up to: 6.9
 Requires PHP: 8.1
-Stable tag: 1.0.0
+Stable tag: 1.4.0
 License: GPLv2 or later
 License URI: https://www.gnu.org/licenses/gpl-2.0.html
 
@@ -107,6 +107,52 @@ The Classifier tab analyzes your existing `wp_postmeta` data (access frequency,
 
 == Changelog ==
 
+= 1.4.0 =
+* Flat-first sorts read the ID tie-break from the flat post_id, so a declared (column, post_id) index returns rows in order; ties now follow the sort direction
+* Meta clauses without a value route as EXISTS; HivePress's featured-listing lookup on every search page uses the flat table
+* Date-ordered routed searches drop the redundant GROUP BY and use a (post_status, post_date, post_id) index (replace the index on the tables listed in `tmdo_post_status_columns`; `wp tmdo post-status-sync` also adds the copy columns to every other post group)
+* Rows rebuilt by the migration engine keep their status/date copies and invalidate cached routed counts
+* Live test tools no longer flush the object cache
+
+= 1.3.0 =
+* Declared flat-table indexes are added only from WP-CLI or WP-Cron, one process at a time (MySQL GET_LOCK); web requests schedule `tmdo_ensure_group_indexes`, and doctor lists indexes not added yet
+* Routed searches with post__not_in count from a cached base count minus the excluded posts; the cache key ignores wpdb's per-request placeholder escape and follows post saves and managed-key writes only, not every post meta write (HivePress keyword + price search no longer slower than native)
+* Rate-limited view requests sample their statistics (1 in 10) instead of writing an option each time
+* Logger info / notice lines only with WP_DEBUG_LOG (filter `tmdo_log_info`)
+* The public listings REST output withholds email, phone, address and IP fields even when declared public
+* Admin form posts are handled before the page renders; uninstall.php globals are prefixed
+* Existing flat tables are upgraded from WP-CLI or WP-Cron only; a group waiting for its upgrade uses native meta, then a drift fix rebuilds it
+* The index lock goes to the primary under read/write splitting; clearing the cold cache bumps a version instead of scanning the object cache group
+* Groups whose flat table was dropped no longer cause database errors on post status changes
+* Schema upgrades share one MySQL lock with index DDL; new or upgraded groups stay native until a drift fix has filled them; mode changes and snapshot deletions are always logged
+
+= 1.2.0 =
+* `wp tmdo drift-check <entity> [--group] [--sample] [--fix]`: reports flat-vs-native drift per key (miss / diff / extra) and rebuilds drifted flat rows from native; native meta is never written, and aeav_only sites are refused
+* The post query router keeps a query native while one of its groups is recorded as drifting; a daily sample (500 entities per group) on the existing health-check event keeps the record current
+* Switching an entity from disabled to dual_write / shadow_read, or turning the Hook Bus back on, schedules a full drift fix 60 s later (`tmdo_drift_resync`)
+* Auto-promotion requires a clean drift check within 2 days; shadow_read diffs are capped at 20 per key per hour
+* `wp tmdo bridge-mode <entity> <mode>` (under the Promotion Guard); `member-backfill --all`; post / user backfill groups come from the registry, json groups included
+* WooCommerce: the `post/wc_product` group is no longer registered — product meta stays native (retire existing tables with `bridge-restore-native post --group=wc_product --retire`)
+* Sort-only searches drive from the flat table when every post of the type has a flat row (HivePress rating sort ~3.3 s → ~0.5–0.85 s on 100k listings)
+* `wp tmdo cleanup-hp-transients --options` removes HivePress AddOn transients left in wp_options
+* Fixed: entity backfill invented default values (0) for keys with no native row; doctor, term-comment-diagnose and bridge-status false alarms; member-cutover fatal on a refused transition
+* Admin output escaping and logging clean-ups from the 2.1 audit
+
+= 1.1.1 =
+* Security: the public GET /wpdo/v1/listings endpoints returned every registered field (show_in_rest defaulted to true), including private values such as integration tokens and WooCommerce purchase notes. Fields are now private unless registered with show_in_rest => true, and protected (underscore) or credential-like keys are never exposed
+* Security: the listings endpoint no longer returns whole rows when no field is public, and only filters / sorts on public columns
+
+= 1.1.0 =
+* Search-index mode for HivePress / WooCommerce sites (docs/adr-004): native meta stays the source of truth, flat tables are its search index
+* Promotion Guard: aeav_only and cleanup are refused while HivePress or WooCommerce is active (filter `tmdo_promotion_guard_allow`)
+* shadow_read reads native meta and samples a flat comparison — fixes lost native writes
+* dual_write / shadow_read: flat values follow native after every write (added_/updated_/deleted_ meta actions, delete_all, key change by meta_id)
+* Arrays in text fields are stored serialized, never "Array"; `wp tmdo repair-array-literals`
+* `wp tmdo bridge-restore-native`: overwrite in aeav_only, only-missing otherwise; no invented default rows
+* Post query router: routes only when the result equals native (OR, several post types, untyped numeric compares stay native), LIKE wildcards, one join per group, no GROUP BY, HivePress `_sort` / named / meta_value_num ordering, WordPress split query kept, flat-sorted searches driven from the flat table (filter `tmdo_router_flat_first`)
+* Deleting an entity no longer leaves an all-NULL flat row behind
+* Zone tables that were never created are never queried
+
 = 1.0.0 =
 * Supersedes `wp-data-optimizer` v3.4.6 — that plugin is retired; this one is the single unified engine
 * Version numbering restarts at 1.0.0; entries below 3.4.6 are the predecessor's history, kept for archaeology

tests/bootstrap.php

@@ -506,10 +506,12 @@ if ( ! function_exists( 'register_rest_route' ) ) {
 // WP_CLI stub (needed before loading CLI classes).
 if ( ! class_exists( 'WP_CLI' ) ) {
 	class WP_CLI {
-		public static function log( string $msg ): void {}
-		public static function warning( string $msg ): void {}
-		public static function success( string $msg ): void {}
-		public static function error( string $msg ): void {}
+		// Output is kept in $GLOBALS['_wp_cli_output'] so CLI tests can assert it.
+		public static function log( string $msg ): void { $GLOBALS['_wp_cli_output'][] = $msg; }
+		public static function line( string $msg = '' ): void { $GLOBALS['_wp_cli_output'][] = $msg; }
+		public static function warning( string $msg ): void { $GLOBALS['_wp_cli_output'][] = 'Warning: ' . $msg; }
+		public static function success( string $msg ): void { $GLOBALS['_wp_cli_output'][] = 'Success: ' . $msg; }
+		public static function error( string $msg ): void { $GLOBALS['_wp_cli_output'][] = 'Error: ' . $msg; }
 		public static function add_command( string $name, $class ): void {}
 	}
 }
@@ -613,6 +615,7 @@ require_once TMDO_PATH . 'includes/class-tmdo-rest-api.php';
 // Engine (v2.0.0).
 require_once TMDO_PATH . 'includes/engine/class-tmdo-type-caster.php';
 require_once TMDO_PATH . 'includes/engine/class-tmdo-mode-manager.php';
+require_once TMDO_PATH . 'includes/engine/class-tmdo-promotion-guard.php';
 require_once TMDO_PATH . 'includes/engine/class-tmdo-audit-logger.php';
 require_once TMDO_PATH . 'includes/engine/class-tmdo-shadow-diff-logger.php';
 require_once TMDO_PATH . 'includes/engine/class-tmdo-conflict-detector.php';
@@ -621,6 +624,7 @@ require_once TMDO_PATH . 'includes/engine/class-tmdo-query-compiler.php';
 require_once TMDO_PATH . 'includes/engine/class-tmdo-schema-manager.php';
 require_once TMDO_PATH . 'includes/engine/class-tmdo-entity-registry.php';
 require_once TMDO_PATH . 'includes/engine/class-tmdo-entity-migration-engine.php';
+require_once TMDO_PATH . 'includes/diagnostic/class-tmdo-drift-check.php';
 require_once TMDO_PATH . 'includes/engine/class-tmdo-entity-health.php';
 require_once TMDO_PATH . 'includes/adapters/interface-entity-adapter.php';
 require_once TMDO_PATH . 'includes/adapters/class-tmdo-adapter-post.php';
@@ -646,6 +650,7 @@ require_once TMDO_PATH . 'includes/migration/class-tmdo-migration-orchestrator.p
 require_once TMDO_PATH . 'includes/migration/class-tmdo-post-migration.php';
 require_once TMDO_PATH . 'includes/migration/class-tmdo-post-group-reconciler.php';
 require_once TMDO_PATH . 'includes/migration/class-tmdo-native-restorer.php';
+require_once TMDO_PATH . 'includes/migration/class-tmdo-array-literal-repair.php';
 require_once TMDO_PATH . 'includes/engine/class-tmdo-post-status-sync.php';
 
 // Options Manager.

tests/integration/ArrayLiteralRepairTest.php

@@ -0,0 +1,119 @@
+<?php
+declare(strict_types=1);
+
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Repair of text / textarea flat columns holding the literal "Array" (stored
+ * by the pre-1.1.0 type caster when the meta value was an array).
+ *
+ * Fixture (user entity, group al_prefs):
+ *   user 1  prefs 'Array'  native prefs serialized array   → repairable
+ *   user 2  loc   'Array'  native loc 'Array' too           → unrepairable, native polluted
+ *   user 3  name  'Array'  no native row                     → unrepairable
+ *   user 4  prefs serialized array, loc 'Taipei'             → untouched
+ */
+class ArrayLiteralRepairTest extends TestCase {
+
+	private const TABLE = 'wp_itest_wpdo_user_al_prefs';
+
+	public static function setUpBeforeClass(): void {
+		foreach ( array(
+			'includes/adapters/interface-entity-adapter.php',
+			'includes/engine/class-tmdo-type-caster.php',
+			'includes/engine/class-tmdo-schema-manager.php',
+			'includes/engine/class-tmdo-entity-registry.php',
+			'includes/engine/class-tmdo-cache-orchestrator.php',
+			'includes/adapters/class-tmdo-adapter-user.php',
+			'includes/migration/class-tmdo-array-literal-repair.php',
+		) as $file ) {
+			require_once WPDO_PLUGIN_DIR . $file;
+		}
+	}
+
+	protected function setUp(): void {
+		global $wpdb;
+		self::drop();
+		$wpdb->query( "CREATE TABLE `{$wpdb->usermeta}` ( umeta_id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT, user_id BIGINT UNSIGNED NOT NULL DEFAULT 0, meta_key VARCHAR(255) DEFAULT NULL, meta_value LONGTEXT, PRIMARY KEY (umeta_id), KEY user_id (user_id) ) ENGINE=InnoDB" );
+		$wpdb->query( 'CREATE TABLE `' . self::TABLE . '` ( id BIGINT NOT NULL AUTO_INCREMENT, user_id BIGINT NOT NULL, prefs TEXT DEFAULT NULL, loc VARCHAR(255) DEFAULT NULL, name VARCHAR(255) DEFAULT NULL, PRIMARY KEY (id), UNIQUE KEY uk_entity (user_id) ) ENGINE=InnoDB' );
+
+		$prefs = serialize( array( 'core' => array( 'welcomeGuide' => false ) ) );
+		$wpdb->insert( self::TABLE, array( 'user_id' => 1, 'prefs' => 'Array' ) );
+		$wpdb->insert( self::TABLE, array( 'user_id' => 2, 'loc' => 'Array' ) );
+		$wpdb->insert( self::TABLE, array( 'user_id' => 3, 'name' => 'Array' ) );
+		$wpdb->insert( self::TABLE, array( 'user_id' => 4, 'prefs' => $prefs, 'loc' => 'Taipei' ) );
+		$wpdb->insert( $wpdb->usermeta, array( 'user_id' => 1, 'meta_key' => 'prefs', 'meta_value' => $prefs ) );
+		$wpdb->insert( $wpdb->usermeta, array( 'user_id' => 2, 'meta_key' => 'loc', 'meta_value' => 'Array' ) );
+		$wpdb->insert( $wpdb->usermeta, array( 'user_id' => 4, 'meta_key' => 'prefs', 'meta_value' => $prefs ) );
+
+		$GLOBALS['_wp_cache'] = array();
+		WPDO_Entity_Registry::init();
+		WPDO_Entity_Registry::register_adapter( 'user', new WPDO_Adapter_User() );
+		WPDO_Entity_Registry::register_group(
+			'user',
+			'al_prefs',
+			array(
+				array( 'key' => 'prefs', 'type' => 'textarea' ),
+				array( 'key' => 'loc', 'type' => 'text' ),
+				array( 'key' => 'name', 'type' => 'text' ),
+			)
+		);
+		WPDO_Schema_Manager::flush_table_exists_cache();
+	}
+
+	protected function tearDown(): void {
+		self::drop();
+		WPDO_Entity_Registry::init();
+	}
+
+	private static function drop(): void {
+		global $wpdb;
+		foreach ( array( $wpdb->usermeta, self::TABLE ) as $table ) {
+			$wpdb->query( "DROP TABLE IF EXISTS `{$table}`" );
+		}
+	}
+
+	private function flat( int $user_id, string $col ): ?string {
+		global $wpdb;
+		return $wpdb->get_var( $wpdb->prepare( "SELECT `{$col}` FROM `" . self::TABLE . '` WHERE user_id = %d', $user_id ) );
+	}
+
+	public function test_dry_run_reports_without_writing(): void {
+		$report = TMDO_Array_Literal_Repair::run( 'user', false );
+
+		$this->assertSame( 3, $report['found'] );
+		$this->assertSame( 1, $report['repairable'] );
+		$this->assertSame( 0, $report['repaired'] );
+		$this->assertSame( 'Array', $this->flat( 1, 'prefs' ) );
+	}
+
+	public function test_apply_repairs_from_native_and_lists_the_rest(): void {
+		$report = TMDO_Array_Literal_Repair::run( 'user', true );
+
+		$this->assertSame( 1, $report['repaired'] );
+		$this->assertSame( serialize( array( 'core' => array( 'welcomeGuide' => false ) ) ), $this->flat( 1, 'prefs' ) );
+		$this->assertSame( 'Array', $this->flat( 2, 'loc' ), 'native is "Array" too — nothing to repair from' );
+		$this->assertSame( 'Array', $this->flat( 3, 'name' ), 'no native row' );
+		$this->assertSame( 'Taipei', $this->flat( 4, 'loc' ) );
+
+		$unrepairable = array_map(
+			static function ( $r ) {
+				return $r['id'] . ':' . $r['key'] . ':' . $r['reason'];
+			},
+			$report['unrepairable']
+		);
+		sort( $unrepairable );
+		$this->assertSame( array( '2:loc:native_is_array_literal', '3:name:no_native_row' ), $unrepairable );
+
+		$this->assertSame( array( array( 'group' => 'al_prefs', 'key' => 'loc', 'id' => 2 ) ), $report['native_polluted'] );
+	}
+
+	public function test_second_run_finds_only_the_unrepairable_rows(): void {
+		TMDO_Array_Literal_Repair::run( 'user', true );
+
+		$report = TMDO_Array_Literal_Repair::run( 'user', true );
+
+		$this->assertSame( 2, $report['found'] );
+		$this->assertSame( 0, $report['repaired'] );
+	}
+}

tests/integration/CleanupHpTransientsTest.php

@@ -0,0 +1,58 @@
+<?php
+declare(strict_types=1);
+
+use PHPUnit\Framework\TestCase;
+
+/**
+ * `wp tmdo cleanup-hp-transients --options` (2.2 PR-080): the HivePress AddOn
+ * moved HivePress's per-post transients out of wp_postmeta into wp_options
+ * (`_transient_wpdo_hp_pm_*`), where they piled up — 1.15 M rows on dev36. Since
+ * PR-081 they live in the object cache when there is one; this removes the
+ * rows left behind. Works without the AddOn loaded (as in core CI).
+ */
+class CleanupHpTransientsTest extends TestCase {
+
+	private const OPTIONS = 'wp_itest_options';
+
+	public static function setUpBeforeClass(): void {
+		require_once WPDO_PLUGIN_DIR . 'cli/class-tmdo-cli-post.php';
+	}
+
+	protected function setUp(): void {
+		global $wpdb;
+		$wpdb->query( 'DROP TABLE IF EXISTS `' . self::OPTIONS . '`' );
+		$wpdb->query( 'CREATE TABLE `' . self::OPTIONS . "` ( option_id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT, option_name VARCHAR(191) NOT NULL DEFAULT '', option_value LONGTEXT NOT NULL, autoload VARCHAR(20) NOT NULL DEFAULT 'yes', PRIMARY KEY (option_id), UNIQUE KEY option_name (option_name) ) ENGINE=InnoDB" );
+		for ( $i = 1; $i <= 5; $i++ ) {
+			$wpdb->insert( self::OPTIONS, array( 'option_name' => "_transient_wpdo_hp_pm_{$i}_abc", 'option_value' => 'v', 'autoload' => 'no' ) );
+			$wpdb->insert( self::OPTIONS, array( 'option_name' => "_transient_timeout_wpdo_hp_pm_{$i}_abc", 'option_value' => '1', 'autoload' => 'no' ) );
+		}
+		foreach ( array( 'siteurl', '_transient_other_plugin', '_transient_wpdo_hp_pmx', 'wpdo_hp_pm_1_abc' ) as $name ) {
+			$wpdb->insert( self::OPTIONS, array( 'option_name' => $name, 'option_value' => 'keep' ) );
+		}
+		$GLOBALS['_wp_cli_output'] = array();
+	}
+
+	protected function tearDown(): void {
+		global $wpdb;
+		$wpdb->query( 'DROP TABLE IF EXISTS `' . self::OPTIONS . '`' );
+	}
+
+	private function remaining(): array {
+		global $wpdb;
+		return $wpdb->get_col( 'SELECT option_name FROM `' . self::OPTIONS . '` ORDER BY option_name' );
+	}
+
+	public function test_dry_run_counts_the_rows_and_deletes_nothing(): void {
+		( new TMDO_CLI_Post() )->cleanup_hp_transients( array(), array( 'options' => true, 'dry-run' => true ) );
+
+		$this->assertCount( 14, $this->remaining() );
+		$this->assertStringContainsString( '10 HivePress transient row(s) in wp_options', implode( "\n", $GLOBALS['_wp_cli_output'] ) );
+	}
+
+	public function test_confirm_deletes_only_the_hivepress_rows_in_batches(): void {
+		( new TMDO_CLI_Post() )->cleanup_hp_transients( array(), array( 'options' => true, 'confirm' => true, 'batch' => '3' ) );
+
+		$this->assertSame( array( '_transient_other_plugin', '_transient_wpdo_hp_pmx', 'siteurl', 'wpdo_hp_pm_1_abc' ), $this->remaining() );
+		$this->assertStringContainsString( 'Deleted 10 HivePress transient row(s) from wp_options', implode( "\n", $GLOBALS['_wp_cli_output'] ) );
+	}
+}

tests/integration/CliBridgeStatusTest.php

@@ -0,0 +1,81 @@
+<?php
+declare(strict_types=1);
+
+use PHPUnit\Framework\TestCase;
+
+/**
+ * `wp tmdo bridge-status` progress (2.2 PR-076): eav_ids of a post group that
+ * belongs to some post types counted every post holding one of its keys, so a
+ * fully backfilled group showed less than 100%.
+ *
+ * flat_rows counted rows without any value too (wp_core holds an all-NULL row
+ * for every post): dev36 showed wp_core at 15306%.
+ *
+ * Fixture: group bs_grp for hp_listing only; bs_price on post 1 (hp_listing)
+ * and post 2 (a plain post); flat rows for post 1 (a value) and post 3
+ * (hp_listing, all NULL).
+ */
+class CliBridgeStatusTest extends TestCase {
+
+	private const POSTS    = 'wp_itest_posts';
+	private const POSTMETA = 'wp_itest_postmeta';
+	private const FLAT     = 'wp_itest_wpdo_post_bs_grp';
+
+	public static function setUpBeforeClass(): void {
+		foreach ( array(
+			'includes/adapters/interface-entity-adapter.php',
+			'includes/adapters/class-tmdo-adapter-post.php',
+			'cli/class-tmdo-cli-v2.php',
+		) as $file ) {
+			require_once WPDO_PLUGIN_DIR . $file;
+		}
+		if ( ! function_exists( 'WP_CLI\Utils\format_items' ) ) {
+			eval( 'namespace WP_CLI\Utils; function format_items( $format, $items, $fields ) { $GLOBALS["_wp_cli_items"] = $items; }' ); // phpcs:ignore Squiz.PHP.Eval -- test-only WP-CLI stub.
+		}
+	}
+
+	protected function setUp(): void {
+		global $wpdb;
+		self::drop();
+		$wpdb->query( 'CREATE TABLE `' . self::POSTS . "` ( ID BIGINT UNSIGNED NOT NULL AUTO_INCREMENT, post_type VARCHAR(20) NOT NULL DEFAULT 'post', PRIMARY KEY (ID) ) ENGINE=InnoDB" );
+		$wpdb->query( 'CREATE TABLE `' . self::POSTMETA . '` ( meta_id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT, post_id BIGINT UNSIGNED NOT NULL DEFAULT 0, meta_key VARCHAR(255) DEFAULT NULL, meta_value LONGTEXT, PRIMARY KEY (meta_id) ) ENGINE=InnoDB' );
+		$wpdb->query( 'CREATE TABLE `' . self::FLAT . '` ( id BIGINT NOT NULL AUTO_INCREMENT, post_id BIGINT NOT NULL, bs_price DECIMAL(18,6) DEFAULT NULL, PRIMARY KEY (id), UNIQUE KEY uk_entity (post_id) ) ENGINE=InnoDB' );
+		$wpdb->insert( self::POSTS, array( 'ID' => 1, 'post_type' => 'hp_listing' ) );
+		$wpdb->insert( self::POSTS, array( 'ID' => 2, 'post_type' => 'post' ) );
+		$wpdb->insert( self::POSTMETA, array( 'post_id' => 1, 'meta_key' => 'bs_price', 'meta_value' => '10' ) );
+		$wpdb->insert( self::POSTMETA, array( 'post_id' => 2, 'meta_key' => 'bs_price', 'meta_value' => '20' ) );
+		$wpdb->insert( self::FLAT, array( 'post_id' => 1, 'bs_price' => 10 ) );
+		$wpdb->insert( self::POSTS, array( 'ID' => 3, 'post_type' => 'hp_listing' ) );
+		$wpdb->insert( self::FLAT, array( 'post_id' => 3 ) );
+
+		$GLOBALS['_wp_options']    = array( 'wpdo_bridge_modes' => array( 'post' => 'dual_write' ) );
+		$GLOBALS['_wp_cli_items']  = array();
+		$GLOBALS['_wp_cli_output'] = array();
+		TMDO_Mode_Manager::reset_cache();
+		WPDO_Entity_Registry::init();
+		WPDO_Entity_Registry::register_adapter( 'post', new WPDO_Adapter_Post() );
+		WPDO_Entity_Registry::register_group( 'post', 'bs_grp', array( array( 'key' => 'bs_price', 'type' => 'decimal' ) ), array( 'post_types' => array( 'hp_listing' ) ) );
+	}
+
+	protected function tearDown(): void {
+		self::drop();
+		WPDO_Entity_Registry::init();
+		TMDO_Mode_Manager::reset_cache();
+	}
+
+	private static function drop(): void {
+		global $wpdb;
+		foreach ( array( self::POSTS, self::POSTMETA, self::FLAT ) as $table ) {
+			$wpdb->query( "DROP TABLE IF EXISTS `{$table}`" );
+		}
+	}
+
+	public function test_counts_only_flat_rows_that_hold_a_value_and_posts_of_the_groups_types(): void {
+		( new TMDO_CLI_V2() )->bridge_status( array(), array() );
+
+		$row = array_values( array_filter( $GLOBALS['_wp_cli_items'], static fn( $r ) => 'bs_grp' === $r['group'] ) )[0];
+		$this->assertSame( 1, $row['flat_rows'] );
+		$this->assertSame( 1, $row['eav_ids'] );
+		$this->assertSame( '100%', $row['progress_%'] );
+	}
+}

tests/integration/CliMemberBackfillTest.php

@@ -0,0 +1,85 @@
+<?php
+declare(strict_types=1);
+
+use PHPUnit\Framework\TestCase;
+
+/**
+ * `wp tmdo member-backfill` takes its groups from the registry (2.2 PR-068).
+ *
+ * Before: a hard-coded VALID_GROUPS list (with the never-registered `sso`)
+ * rejected groups registered by add-ons, and there was no way to backfill
+ * every user group at once — R-2.1 had to fall back to `wp eval`.
+ *
+ * Fixture (user entity): groups cb_one (cb_a) and cb_two (cb_b).
+ */
+class CliMemberBackfillTest extends TestCase {
+
+	private const ONE    = 'wp_itest_wpdo_user_cb_one';
+	private const TWO    = 'wp_itest_wpdo_user_cb_two';
+	private const STATUS = 'wp_itest_wpdo_migration_status';
+
+	public static function setUpBeforeClass(): void {
+		foreach ( array(
+			'includes/adapters/interface-entity-adapter.php',
+			'includes/adapters/class-tmdo-adapter-user.php',
+			'cli/class-tmdo-cli-member.php',
+		) as $file ) {
+			require_once WPDO_PLUGIN_DIR . $file;
+		}
+	}
+
+	protected function setUp(): void {
+		global $wpdb;
+		self::drop();
+		$wpdb->query( "CREATE TABLE `{$wpdb->usermeta}` ( umeta_id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT, user_id BIGINT UNSIGNED NOT NULL DEFAULT 0, meta_key VARCHAR(255) DEFAULT NULL, meta_value LONGTEXT, PRIMARY KEY (umeta_id), KEY user_id (user_id) ) ENGINE=InnoDB" );
+		$wpdb->query( 'CREATE TABLE `' . self::ONE . '` ( id BIGINT NOT NULL AUTO_INCREMENT, user_id BIGINT NOT NULL, cb_a VARCHAR(255) DEFAULT NULL, PRIMARY KEY (id), UNIQUE KEY uk_entity (user_id) ) ENGINE=InnoDB' );
+		$wpdb->query( 'CREATE TABLE `' . self::TWO . '` ( id BIGINT NOT NULL AUTO_INCREMENT, user_id BIGINT NOT NULL, cb_b VARCHAR(255) DEFAULT NULL, PRIMARY KEY (id), UNIQUE KEY uk_entity (user_id) ) ENGINE=InnoDB' );
+		$wpdb->query( 'CREATE TABLE `' . self::STATUS . "` ( id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT, entity_type VARCHAR(50) NOT NULL, group_name VARCHAR(50) NOT NULL, last_id BIGINT UNSIGNED NOT NULL DEFAULT 0, total_migrated BIGINT UNSIGNED NOT NULL DEFAULT 0, status VARCHAR(20) NOT NULL DEFAULT 'pending', started_at DATETIME DEFAULT NULL, completed_at DATETIME DEFAULT NULL, PRIMARY KEY (id), UNIQUE KEY entity_group (entity_type, group_name) ) ENGINE=InnoDB" );
+		$wpdb->insert( $wpdb->usermeta, array( 'user_id' => 1, 'meta_key' => 'cb_a', 'meta_value' => 'one' ) );
+		$wpdb->insert( $wpdb->usermeta, array( 'user_id' => 1, 'meta_key' => 'cb_b', 'meta_value' => 'two' ) );
+
+		$GLOBALS['_wp_cache'] = array();
+		WPDO_Entity_Registry::init();
+		WPDO_Entity_Registry::register_adapter( 'user', new WPDO_Adapter_User() );
+		WPDO_Entity_Registry::register_group( 'user', 'cb_one', array( array( 'key' => 'cb_a', 'type' => 'text' ) ) );
+		WPDO_Entity_Registry::register_group( 'user', 'cb_two', array( array( 'key' => 'cb_b', 'type' => 'text' ) ) );
+		WPDO_Schema_Manager::flush_table_exists_cache();
+	}
+
+	protected function tearDown(): void {
+		self::drop();
+		WPDO_Entity_Registry::init();
+	}
+
+	private static function drop(): void {
+		global $wpdb;
+		foreach ( array( $wpdb->usermeta, self::ONE, self::TWO, self::STATUS ) as $table ) {
+			$wpdb->query( "DROP TABLE IF EXISTS `{$table}`" );
+		}
+	}
+
+	private function flat( string $table, string $col ): ?string {
+		global $wpdb;
+		return $wpdb->get_var( "SELECT `{$col}` FROM `{$table}` WHERE user_id = 1" );
+	}
+
+	public function test_all_backfills_every_registered_user_group(): void {
+		( new TMDO_CLI_Member() )->member_backfill( array(), array( 'all' => true ) );
+
+		$this->assertSame( 'one', $this->flat( self::ONE, 'cb_a' ) );
+		$this->assertSame( 'two', $this->flat( self::TWO, 'cb_b' ) );
+	}
+
+	public function test_group_accepts_any_registered_user_group(): void {
+		( new TMDO_CLI_Member() )->member_backfill( array(), array( 'group' => 'cb_two' ) );
+
+		$this->assertSame( 'two', $this->flat( self::TWO, 'cb_b' ) );
+		$this->assertNull( $this->flat( self::ONE, 'cb_a' ), 'only the requested group' );
+	}
+
+	public function test_backfillable_groups_leave_out_restored_orphans(): void {
+		WPDO_Entity_Registry::restore_group( 'user', 'cb_orphan', array( array( 'key' => 'cb_orphan_key', 'type' => 'text' ) ) );
+
+		$this->assertSame( array( 'cb_one', 'cb_two' ), TMDO_Entity_Migration_Engine::backfillable_groups( 'user' ) );
+	}
+}

tests/integration/DoctorTest.php

@@ -0,0 +1,138 @@
+<?php
+declare(strict_types=1);
+
+use PHPUnit\Framework\TestCase;
+
+/**
+ * `wp tmdo doctor` false alarms (2.2 PR-076).
+ *
+ * The user flat tables were a hard-coded list including wpdo_user_sso, a group
+ * never registered: doctor reported it MISSING and failed on every site. The
+ * tables now come from the registry; doctor also reports Promotion Guard
+ * violations and the recorded drift status.
+ */
+class DoctorTest extends TestCase {
+
+	private const HAVE = 'wp_itest_wpdo_user_dt_have';
+	private const CORE = array( 'wp_itest_wpdo_migration_status', 'wp_itest_wpdo_user_points_ledger' );
+
+	public static function setUpBeforeClass(): void {
+		foreach ( array(
+			'includes/adapters/interface-entity-adapter.php',
+			'includes/adapters/class-tmdo-adapter-user.php',
+			'includes/engine/class-tmdo-promotion-guard.php',
+			'cli/class-tmdo-cli.php',
+		) as $file ) {
+			require_once WPDO_PLUGIN_DIR . $file;
+		}
+	}
+
+	protected function setUp(): void {
+		global $wpdb;
+		self::drop();
+		foreach ( array_merge( array( self::HAVE ), self::CORE ) as $table ) {
+			$wpdb->query( "CREATE TABLE `{$table}` ( id BIGINT NOT NULL AUTO_INCREMENT, user_id BIGINT NOT NULL DEFAULT 0, PRIMARY KEY (id) ) ENGINE=InnoDB" );
+		}
+
+		$GLOBALS['_wp_options']    = array();
+		$GLOBALS['_wp_cli_output'] = array();
+		TMDO_Mode_Manager::reset_cache();
+		WPDO_Entity_Registry::init();
+		WPDO_Entity_Registry::register_adapter( 'user', new WPDO_Adapter_User() );
+		WPDO_Entity_Registry::register_group( 'user', 'dt_have', array( array( 'key' => 'dt_a', 'type' => 'text' ) ) );
+		WPDO_Schema_Manager::flush_table_exists_cache();
+	}
+
+	protected function tearDown(): void {
+		self::drop();
+		WPDO_Entity_Registry::init();
+		TMDO_Mode_Manager::reset_cache();
+	}
+
+	private static function drop(): void {
+		global $wpdb;
+		foreach ( array_merge( array( self::HAVE ), self::CORE ) as $table ) {
+			$wpdb->query( "DROP TABLE IF EXISTS `{$table}`" );
+		}
+	}
+
+	private function cli_output(): string {
+		return implode( "\n", $GLOBALS['_wp_cli_output'] ?? array() );
+	}
+
+	public function test_entity_tables_come_from_the_registry(): void {
+		$ok = TMDO_CLI::check_entity_tables();
+
+		$this->assertTrue( $ok, $this->cli_output() );
+		$this->assertStringContainsString( '[OK] ' . self::HAVE, $this->cli_output() );
+		$this->assertStringNotContainsString( 'wpdo_user_sso', $this->cli_output() );
+	}
+
+	public function test_a_registered_group_without_its_table_is_reported(): void {
+		WPDO_Entity_Registry::register_group( 'user', 'dt_missing', array( array( 'key' => 'dt_b', 'type' => 'text' ) ) );
+
+		$ok = TMDO_CLI::check_entity_tables();
+
+		$this->assertFalse( $ok );
+		$this->assertStringContainsString( '[MISSING] wp_itest_wpdo_user_dt_missing', $this->cli_output() );
+	}
+
+	public function test_reports_drifting_groups(): void {
+		$GLOBALS['_wp_options']['wpdo_bridge_modes']        = array( 'user' => 'dual_write' );
+		$GLOBALS['_wp_options'][ TMDO_Drift_Check::OPTION ] = array(
+			'user' => array(
+				'dt_have' => array(
+					'miss'       => 1,
+					'diff'       => 2,
+					'extra'      => 0,
+					'sample'     => 0,
+					'checked_at' => '2026-09-27 00:00:00',
+				),
+			),
+		);
+		TMDO_Mode_Manager::reset_cache();
+
+		TMDO_CLI::report_guard_and_drift();
+
+		$this->assertStringContainsString( 'dt_have miss=1 diff=2 extra=0', $this->cli_output() );
+		$this->assertStringContainsString( 'wp tmdo drift-check user --fix', $this->cli_output() );
+	}
+
+	public function test_ignores_the_record_of_a_group_no_longer_registered(): void {
+		$GLOBALS['_wp_options']['wpdo_bridge_modes']        = array( 'user' => 'dual_write' );
+		$GLOBALS['_wp_options'][ TMDO_Drift_Check::OPTION ] = array(
+			'user' => array(
+				'dt_have' => array(
+					'miss'       => 0,
+					'diff'       => 0,
+					'extra'      => 0,
+					'sample'     => 0,
+					'checked_at' => '2026-09-27 00:00:00',
+				),
+				'dt_gone' => array(
+					'miss'       => 3,
+					'diff'       => 0,
+					'extra'      => 0,
+					'sample'     => 0,
+					'checked_at' => '2026-09-20 00:00:00',
+				),
+			),
+		);
+		TMDO_Mode_Manager::reset_cache();
+
+		TMDO_CLI::report_guard_and_drift();
+
+		$this->assertStringContainsString( '[OK] user: 1 group(s) clean (oldest check 2026-09-27 00:00:00 UTC)', $this->cli_output() );
+		$this->assertStringNotContainsString( 'dt_gone', $this->cli_output() );
+	}
+
+	public function test_reports_an_entity_never_checked(): void {
+		$GLOBALS['_wp_options']['wpdo_bridge_modes'] = array( 'user' => 'dual_write' );
+		TMDO_Mode_Manager::reset_cache();
+
+		TMDO_CLI::report_guard_and_drift();
+
+		$this->assertStringContainsString( 'user: never checked', $this->cli_output() );
+		$this->assertStringContainsString( 'Promotion Guard: no violation', $this->cli_output() );
+	}
+}

tests/integration/DriftCheckTest.php

@@ -0,0 +1,319 @@
+<?php
+declare(strict_types=1);
+
+use PHPUnit\Framework\TestCase;
+
+/**
+ * TMDO_Drift_Check (2.2 PR-070): read-only flat-vs-native comparison.
+ *
+ * Fixture (user entity, group dc_grp):
+ *   user 1  every key equal in value, differently formatted
+ *           (50 vs 50.000000, serialized array vs JSON, required flag holding
+ *           its default with no native row)                         → clean
+ *   user 2  name 'b' vs 'B', cnt 5 vs 6                              → diff ×2
+ *   user 3  native name, flat row with name NULL                     → miss
+ *   user 4  no native rows, flat cnt 9                               → extra
+ *   user 5  native name '', flat NULL                                → clean
+ *   user 6  native name longer than a text column, flat NULL         → clean
+ *   user 7  native cnt, no flat row                                  → miss
+ */
+class DriftCheckTest extends TestCase {
+
+	private const TABLE = 'wp_itest_wpdo_user_dc_grp';
+
+	public static function setUpBeforeClass(): void {
+		foreach ( array(
+			'includes/adapters/interface-entity-adapter.php',
+			'includes/adapters/class-tmdo-adapter-user.php',
+			'includes/diagnostic/class-tmdo-drift-check.php',
+		) as $file ) {
+			require_once WPDO_PLUGIN_DIR . $file;
+		}
+	}
+
+	protected function setUp(): void {
+		global $wpdb;
+		self::drop();
+		$wpdb->query( "CREATE TABLE `{$wpdb->users}` ( ID BIGINT UNSIGNED NOT NULL AUTO_INCREMENT, user_login VARCHAR(60) NOT NULL DEFAULT '', PRIMARY KEY (ID) ) ENGINE=InnoDB" );
+		$wpdb->query( "CREATE TABLE `{$wpdb->usermeta}` ( umeta_id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT, user_id BIGINT UNSIGNED NOT NULL DEFAULT 0, meta_key VARCHAR(255) DEFAULT NULL, meta_value LONGTEXT, PRIMARY KEY (umeta_id), KEY user_id (user_id) ) ENGINE=InnoDB" );
+		$wpdb->query( 'CREATE TABLE `' . self::TABLE . '` ( id BIGINT NOT NULL AUTO_INCREMENT, user_id BIGINT NOT NULL, num DECIMAL(18,6) DEFAULT NULL, cnt BIGINT(20) DEFAULT NULL, name VARCHAR(255) DEFAULT NULL, prefs TEXT DEFAULT NULL, meta_json LONGTEXT DEFAULT NULL, flag BIGINT(20) NOT NULL DEFAULT 0, PRIMARY KEY (id), UNIQUE KEY uk_entity (user_id) ) ENGINE=InnoDB' );
+
+		for ( $id = 1; $id <= 7; $id++ ) {
+			$wpdb->insert( $wpdb->users, array( 'ID' => $id, 'user_login' => "u{$id}" ) );
+		}
+		$prefs = serialize( array( 'core' => array( 'welcomeGuide' => false ) ) );
+		$this->native( 1, array( 'num' => '50', 'cnt' => '3', 'name' => 'a', 'prefs' => $prefs, 'meta_json' => serialize( array( 'w' => 640, 'tags' => array( 'x' ) ) ) ) );
+		$this->flat( array( 'user_id' => 1, 'num' => '50.000000', 'cnt' => 3, 'name' => 'a', 'prefs' => $prefs, 'meta_json' => '{"w":640,"tags":["x"]}' ) );
+		$this->native( 2, array( 'name' => 'b', 'cnt' => '5' ) );
+		$this->flat( array( 'user_id' => 2, 'name' => 'B', 'cnt' => 6 ) );
+		$this->native( 3, array( 'name' => 'c' ) );
+		$this->flat( array( 'user_id' => 3, 'cnt' => null ) );
+		$this->flat( array( 'user_id' => 4, 'cnt' => 9 ) );
+		$this->native( 5, array( 'name' => '' ) );
+		$this->flat( array( 'user_id' => 5 ) );
+		$this->native( 6, array( 'name' => str_repeat( 'x', 300 ) ) );
+		$this->flat( array( 'user_id' => 6 ) );
+		$this->native( 7, array( 'cnt' => '7' ) );
+
+		$GLOBALS['_wp_options'] = array();
+		$GLOBALS['_wp_cache']   = array();
+		WPDO_Entity_Registry::init();
+		WPDO_Entity_Registry::register_adapter( 'user', new WPDO_Adapter_User() );
+		WPDO_Entity_Registry::register_group(
+			'user',
+			'dc_grp',
+			array(
+				array( 'key' => 'num', 'type' => 'decimal' ),
+				array( 'key' => 'cnt', 'type' => 'integer' ),
+				array( 'key' => 'name', 'type' => 'text' ),
+				array( 'key' => 'prefs', 'type' => 'textarea' ),
+				array( 'key' => 'meta_json', 'type' => 'json' ),
+				array( 'key' => 'flag', 'type' => 'integer', 'default' => 0, 'required' => true ),
+			)
+		);
+		WPDO_Schema_Manager::flush_table_exists_cache();
+	}
+
+	protected function tearDown(): void {
+		self::drop();
+		WPDO_Entity_Registry::init();
+	}
+
+	private static function drop(): void {
+		global $wpdb;
+		foreach ( array( $wpdb->users, $wpdb->usermeta, self::TABLE ) as $table ) {
+			$wpdb->query( "DROP TABLE IF EXISTS `{$table}`" );
+		}
+	}
+
+	private function native( int $user_id, array $values ): void {
+		global $wpdb;
+		foreach ( $values as $key => $value ) {
+			$wpdb->insert( $wpdb->usermeta, array( 'user_id' => $user_id, 'meta_key' => $key, 'meta_value' => $value ) );
+		}
+	}
+
+	private function flat( array $row ): void {
+		global $wpdb;
+		$wpdb->insert( self::TABLE, $row );
+	}
+
+	private function snapshot(): string {
+		global $wpdb;
+		return md5( wp_json_encode( array( $wpdb->get_results( "SELECT * FROM `{$wpdb->usermeta}` ORDER BY umeta_id", ARRAY_A ), $wpdb->get_results( 'SELECT * FROM `' . self::TABLE . '` ORDER BY id', ARRAY_A ) ) ) );
+	}
+
+	public function test_counts_miss_diff_and_extra_per_key(): void {
+		$report = TMDO_Drift_Check::run( 'user' );
+
+		$this->assertSame( array( 'miss' => 2, 'diff' => 2, 'extra' => 1 ), $report['total'] );
+		$keys = $report['groups']['dc_grp']['keys'];
+		$this->assertSame( array( 'miss' => 1, 'diff' => 1, 'extra' => 0 ), $keys['name'] );
+		$this->assertSame( array( 'miss' => 1, 'diff' => 1, 'extra' => 1 ), $keys['cnt'] );
+		foreach ( array( 'num', 'prefs', 'meta_json', 'flag' ) as $key ) {
+			$this->assertSame( array( 'miss' => 0, 'diff' => 0, 'extra' => 0 ), $keys[ $key ], "{$key}: equal by value" );
+		}
+	}
+
+	public function test_records_the_outcome_per_group(): void {
+		TMDO_Drift_Check::run( 'user', 'dc_grp' );
+
+		$status = get_option( TMDO_Drift_Check::OPTION )['user']['dc_grp'];
+		$this->assertSame( 2, $status['miss'] );
+		$this->assertSame( 2, $status['diff'] );
+		$this->assertSame( 1, $status['extra'] );
+		$this->assertSame( 0, $status['sample'] );
+		$this->assertNotEmpty( $status['checked_at'] );
+	}
+
+	public function test_a_sample_covering_every_user_matches_the_full_check(): void {
+		$report = TMDO_Drift_Check::run( 'user', '', 100 );
+
+		$this->assertSame( array( 'miss' => 2, 'diff' => 2, 'extra' => 1 ), $report['total'] );
+		$this->assertSame( 100, get_option( TMDO_Drift_Check::OPTION )['user']['dc_grp']['sample'] );
+	}
+
+	public function test_never_writes_native_or_flat(): void {
+		$before = $this->snapshot();
+
+		TMDO_Drift_Check::run( 'user' );
+
+		$this->assertSame( $before, $this->snapshot() );
+	}
+
+	// ── fix() (2.2 PR-071) ──────────────────────────────────────────────────
+
+	private function flat_row( int $user_id ): ?array {
+		global $wpdb;
+		return $wpdb->get_row( $wpdb->prepare( 'SELECT num, cnt, name, flag FROM `' . self::TABLE . '` WHERE user_id = %d', $user_id ), ARRAY_A );
+	}
+
+	public function test_fix_rebuilds_drifted_rows_from_native_and_leaves_no_drift(): void {
+		$result = TMDO_Drift_Check::fix( 'user' );
+
+		$this->assertSame( array( 'miss' => 0, 'diff' => 0, 'extra' => 0 ), $result['after']['total'] );
+		$this->assertSame( 'b', $this->flat_row( 2 )['name'] );
+		$this->assertSame( '5', $this->flat_row( 2 )['cnt'] );
+		$this->assertSame( 'c', $this->flat_row( 3 )['name'] );
+		$this->assertSame( array( 'num' => null, 'cnt' => '7', 'name' => null, 'flag' => '0' ), $this->flat_row( 7 ), 'new row: no invented defaults' );
+		$this->assertSame( array( 'num' => null, 'cnt' => null, 'name' => null, 'flag' => '0' ), $this->flat_row( 4 ), 'no native values: row kept, columns cleared' );
+		$this->assertSame( 0, get_option( TMDO_Drift_Check::OPTION )['user']['dc_grp']['diff'] );
+	}
+
+	public function test_fix_deletes_rows_of_entities_that_no_longer_exist(): void {
+		$this->flat( array( 'user_id' => 99, 'name' => 'ghost' ) );
+
+		$result = TMDO_Drift_Check::fix( 'user' );
+
+		$this->assertSame( 1, $result['fixed']['deleted_rows'] );
+		$this->assertNull( $this->flat_row( 99 ) );
+		$this->assertNotNull( $this->flat_row( 1 ), 'rows of existing users stay' );
+	}
+
+	public function test_fix_never_writes_native_and_invalidates_the_row_cache(): void {
+		global $wpdb;
+		$native = md5( wp_json_encode( $wpdb->get_results( "SELECT * FROM `{$wpdb->usermeta}` ORDER BY umeta_id", ARRAY_A ) ) );
+		TMDO_Cache_Orchestrator::set_row( 'user', 2, 'dc_grp', array( 'name' => 'B' ) );
+
+		TMDO_Drift_Check::fix( 'user' );
+
+		$this->assertSame( $native, md5( wp_json_encode( $wpdb->get_results( "SELECT * FROM `{$wpdb->usermeta}` ORDER BY umeta_id", ARRAY_A ) ) ) );
+		$this->assertFalse( TMDO_Cache_Orchestrator::get_row( 'user', 2, 'dc_grp' ) );
+	}
+
+	// ── cron_tick() (2.2 PR-073) ────────────────────────────────────────────
+
+	private static function set_modes( ?array $modes ): void {
+		$cache = ( new ReflectionClass( WPDO_Mode_Manager::class ) )->getProperty( 'cache' );
+		$cache->setAccessible( true );
+		$cache->setValue( null, $modes );
+	}
+
+	public function test_the_daily_tick_samples_entities_that_write_to_flat(): void {
+		self::set_modes( array( 'post' => 'disabled', 'user' => 'dual_write', 'term' => 'disabled', 'comment' => 'disabled' ) );
+		try {
+			TMDO_Drift_Check::cron_tick();
+		} finally {
+			self::set_modes( null );
+		}
+
+		$status = get_option( TMDO_Drift_Check::OPTION );
+		$this->assertSame( TMDO_Drift_Check::CRON_SAMPLE, $status['user']['dc_grp']['sample'] );
+		$this->assertSame( 2, $status['user']['dc_grp']['diff'], 'the sample covers all 7 fixture users' );
+		$this->assertArrayNotHasKey( 'post', $status );
+	}
+
+	public function test_the_daily_tick_skips_entities_that_do_not_write_to_flat(): void {
+		self::set_modes( array( 'post' => 'disabled', 'user' => 'disabled', 'term' => 'disabled', 'comment' => 'disabled' ) );
+		try {
+			TMDO_Drift_Check::cron_tick();
+		} finally {
+			self::set_modes( null );
+		}
+
+		$this->assertFalse( get_option( TMDO_Drift_Check::OPTION ) );
+	}
+
+	public function test_the_daily_tick_skips_aeav_only_where_flat_is_the_source_of_truth(): void {
+		self::set_modes( array( 'post' => 'disabled', 'user' => 'aeav_only', 'term' => 'disabled', 'comment' => 'disabled' ) );
+		try {
+			TMDO_Drift_Check::cron_tick();
+		} finally {
+			self::set_modes( null );
+		}
+
+		$this->assertFalse( get_option( TMDO_Drift_Check::OPTION ) );
+	}
+
+	public function test_fix_refuses_aeav_only_and_leaves_flat_alone(): void {
+		global $wpdb;
+		$flat = md5( wp_json_encode( $wpdb->get_results( 'SELECT * FROM `' . self::TABLE . '` ORDER BY id', ARRAY_A ) ) );
+		self::set_modes( array( 'post' => 'disabled', 'user' => 'aeav_only', 'term' => 'disabled', 'comment' => 'disabled' ) );
+		try {
+			TMDO_Drift_Check::fix( 'user' );
+			$this->fail( 'fix() must refuse aeav_only' );
+		} catch ( RuntimeException $e ) {
+			$this->assertStringContainsString( 'aeav_only', $e->getMessage() );
+		} finally {
+			self::set_modes( null );
+		}
+
+		$this->assertSame( $flat, md5( wp_json_encode( $wpdb->get_results( 'SELECT * FROM `' . self::TABLE . '` ORDER BY id', ARRAY_A ) ) ) );
+	}
+
+	// ── resync after writes bypassed flat (2.2 PR-074) ──────────────────────
+
+	public function test_turning_writes_on_schedules_a_fix_for_that_entity(): void {
+		$this->assertSame( array( 'user' ), TMDO_Drift_Check::resync_after_mode_change( 'user', 'dual_write', 'disabled' ) );
+	}
+
+	public function test_other_mode_changes_schedule_nothing(): void {
+		$this->assertSame( array(), TMDO_Drift_Check::resync_after_mode_change( 'user', 'shadow_read', 'dual_write' ) );
+		$this->assertSame( array(), TMDO_Drift_Check::resync_after_mode_change( 'user', 'aeav_only', 'shadow_read' ) );
+		$this->assertSame( array(), TMDO_Drift_Check::resync_after_mode_change( 'user', 'disabled', 'dual_write' ) );
+	}
+
+	public function test_turning_the_hook_bus_on_schedules_a_fix_for_entities_that_keep_native(): void {
+		self::set_modes( array( 'post' => 'aeav_only', 'user' => 'dual_write', 'term' => 'shadow_read', 'comment' => 'disabled' ) );
+		try {
+			$on  = TMDO_Drift_Check::resync_after_hook_bus_change( '0', '1' );
+			$off = TMDO_Drift_Check::resync_after_hook_bus_change( '1', '0' );
+		} finally {
+			self::set_modes( null );
+		}
+
+		$this->assertSame( array( 'user', 'term' ), $on );
+		$this->assertSame( array(), $off );
+	}
+
+	public function test_the_scheduled_fix_repairs_the_entity(): void {
+		self::set_modes( array( 'post' => 'disabled', 'user' => 'dual_write', 'term' => 'disabled', 'comment' => 'disabled' ) );
+		try {
+			TMDO_Drift_Check::run_scheduled_fix( 'user' );
+		} finally {
+			self::set_modes( null );
+		}
+
+		$status = get_option( TMDO_Drift_Check::OPTION )['user']['dc_grp'];
+		$this->assertSame( 0, $status['miss'] + $status['diff'] + $status['extra'] );
+	}
+
+	public function test_the_scheduled_fix_leaves_aeav_only_alone(): void {
+		self::set_modes( array( 'post' => 'disabled', 'user' => 'aeav_only', 'term' => 'disabled', 'comment' => 'disabled' ) );
+		try {
+			TMDO_Drift_Check::run_scheduled_fix( 'user' );
+		} finally {
+			self::set_modes( null );
+		}
+
+		$this->assertFalse( get_option( TMDO_Drift_Check::OPTION ) );
+		$this->assertSame( 'B', $this->flat_row( 2 )['name'], 'flat untouched' );
+	}
+
+	public function test_the_resync_triggers_are_hooked(): void {
+		$source = (string) file_get_contents( WPDO_PLUGIN_DIR . 'includes/class-tmdo-core.php' );
+
+		foreach ( array(
+			"add_action( 'wpdo_bridge_mode_changed', array( 'TMDO_Drift_Check', 'on_mode_changed' ), 10, 3 );",
+			"add_action( 'update_option_' . TMDO_Hook_Bus_Bridge::OPTION, array( 'TMDO_Drift_Check', 'on_hook_bus_toggled' ), 10, 2 );",
+			"add_action( 'add_option_' . TMDO_Hook_Bus_Bridge::OPTION, array( 'TMDO_Drift_Check', 'on_hook_bus_added' ), 10, 2 );",
+			"add_action( TMDO_Drift_Check::RESYNC_HOOK, array( 'TMDO_Drift_Check', 'run_scheduled_fix' ) );",
+		) as $line ) {
+			$this->assertStringContainsString( $line, $source );
+		}
+		// Literal: uninstall.php does not load TMDO_Drift_Check.
+		$installer = (string) file_get_contents( WPDO_PLUGIN_DIR . 'includes/class-tmdo-installer.php' );
+		$this->assertSame( 2, substr_count( $installer, "'" . TMDO_Drift_Check::RESYNC_HOOK . "'" ), 'cleared on deactivate and uninstall' );
+	}
+
+	public function test_the_daily_tick_runs_on_the_daily_health_check_hook(): void {
+		$source = (string) file_get_contents( WPDO_PLUGIN_DIR . 'includes/class-tmdo-core.php' );
+
+		$this->assertStringContainsString( "add_action( 'wpdo_daily_health_check', array( 'TMDO_Drift_Check', 'cron_tick' ) );", $source );
+	}
+
+	public function test_rejects_an_unknown_group(): void {
+		$this->expectException( InvalidArgumentException::class );
+		TMDO_Drift_Check::run( 'user', 'no_such_group' );
+	}
+}

tests/integration/EntityMigrationEngineDefaultsTest.php

@@ -0,0 +1,139 @@
+<?php
+declare(strict_types=1);
+
+use PHPUnit\Framework\TestCase;
+
+/**
+ * TMDO_Entity_Migration_Engine::migrate_group() must not invent values for keys
+ * the object has no native row for.
+ *
+ * Bug (dev36 R-2.1, 2026-09-26): the engine REPLACEs only the columns it found
+ * native rows for, so every other column fell back to its DDL default —
+ * user activity.session_count / account_flags (nullable, DEFAULT 0) became 0
+ * for every backfilled user, and the checker's "extra" count went 60 → 123.
+ *
+ * Fixture (user entity, group md_act):
+ *   login_count   integer, default 0, nullable
+ *   session_count integer, default 0, nullable
+ *   note          text
+ *   req_flag      integer, required (NOT NULL DEFAULT 0)
+ */
+class EntityMigrationEngineDefaultsTest extends TestCase {
+
+	private const TABLE  = 'wp_itest_wpdo_user_md_act';
+	private const STATUS = 'wp_itest_wpdo_migration_status';
+
+	public static function setUpBeforeClass(): void {
+		foreach ( array(
+			'includes/adapters/interface-entity-adapter.php',
+			'includes/engine/class-tmdo-type-caster.php',
+			'includes/engine/class-tmdo-schema-manager.php',
+			'includes/engine/class-tmdo-entity-registry.php',
+			'includes/engine/class-tmdo-entity-migration-engine.php',
+			'includes/adapters/class-tmdo-adapter-user.php',
+		) as $file ) {
+			require_once WPDO_PLUGIN_DIR . $file;
+		}
+	}
+
+	protected function setUp(): void {
+		global $wpdb;
+		self::drop();
+		$wpdb->query( "CREATE TABLE `{$wpdb->usermeta}` ( umeta_id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT, user_id BIGINT UNSIGNED NOT NULL DEFAULT 0, meta_key VARCHAR(255) DEFAULT NULL, meta_value LONGTEXT, PRIMARY KEY (umeta_id), KEY user_id (user_id) ) ENGINE=InnoDB" );
+		$wpdb->query( 'CREATE TABLE `' . self::TABLE . '` ( id BIGINT NOT NULL AUTO_INCREMENT, user_id BIGINT NOT NULL, login_count BIGINT(20) DEFAULT 0, session_count BIGINT(20) DEFAULT 0, note VARCHAR(255) DEFAULT NULL, req_flag BIGINT(20) NOT NULL DEFAULT 0, PRIMARY KEY (id), UNIQUE KEY uk_entity (user_id) ) ENGINE=InnoDB' );
+		$wpdb->query( 'CREATE TABLE `' . self::STATUS . "` ( id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT, entity_type VARCHAR(50) NOT NULL, group_name VARCHAR(50) NOT NULL, last_id BIGINT UNSIGNED NOT NULL DEFAULT 0, total_migrated BIGINT UNSIGNED NOT NULL DEFAULT 0, status VARCHAR(20) NOT NULL DEFAULT 'pending', started_at DATETIME DEFAULT NULL, completed_at DATETIME DEFAULT NULL, PRIMARY KEY (id), UNIQUE KEY entity_group (entity_type, group_name) ) ENGINE=InnoDB" );
+
+		$GLOBALS['_wp_cache'] = array();
+		WPDO_Entity_Registry::init();
+		WPDO_Entity_Registry::register_adapter( 'user', new WPDO_Adapter_User() );
+		WPDO_Entity_Registry::register_group(
+			'user',
+			'md_act',
+			array(
+				array( 'key' => 'login_count', 'type' => 'integer', 'default' => 0 ),
+				array( 'key' => 'session_count', 'type' => 'integer', 'default' => 0 ),
+				array( 'key' => 'note', 'type' => 'text' ),
+				array( 'key' => 'req_flag', 'type' => 'integer', 'default' => 0, 'required' => true ),
+			)
+		);
+		WPDO_Schema_Manager::flush_table_exists_cache();
+	}
+
+	protected function tearDown(): void {
+		self::drop();
+		WPDO_Entity_Registry::init();
+	}
+
+	private static function drop(): void {
+		global $wpdb;
+		foreach ( array( $wpdb->usermeta, self::TABLE, self::STATUS ) as $table ) {
+			$wpdb->query( "DROP TABLE IF EXISTS `{$table}`" );
+		}
+	}
+
+	private function native( int $user_id, string $key, string $value ): void {
+		global $wpdb;
+		$wpdb->insert( $wpdb->usermeta, array( 'user_id' => $user_id, 'meta_key' => $key, 'meta_value' => $value ) );
+	}
+
+	/** @return array<string, string|null> */
+	private function flat_row( int $user_id ): array {
+		global $wpdb;
+		return (array) $wpdb->get_row( $wpdb->prepare( 'SELECT login_count, session_count, note, req_flag FROM `' . self::TABLE . '` WHERE user_id = %d', $user_id ), ARRAY_A );
+	}
+
+	private function migrate(): array {
+		return TMDO_Entity_Migration_Engine::migrate_group( 'user', 'md_act', array( 'resume' => false, 'sleep_ms' => 0 ) );
+	}
+
+	public function test_keys_without_a_native_row_stay_null_instead_of_the_column_default(): void {
+		$this->native( 1, 'login_count', '7' );
+
+		$report = $this->migrate();
+
+		$this->assertSame( 1, $report['migrated'] );
+		$row = $this->flat_row( 1 );
+		$this->assertSame( '7', $row['login_count'] );
+		$this->assertNull( $row['session_count'], 'no native session_count — must not become the DEFAULT 0' );
+		$this->assertNull( $row['note'] );
+	}
+
+	public function test_a_native_value_equal_to_the_default_is_still_written(): void {
+		$this->native( 1, 'session_count', '0' );
+
+		$this->migrate();
+
+		$this->assertSame( '0', $this->flat_row( 1 )['session_count'] );
+	}
+
+	public function test_a_stale_flat_value_is_cleared_when_the_native_row_is_gone(): void {
+		global $wpdb;
+		$wpdb->insert( self::TABLE, array( 'user_id' => 1, 'login_count' => 3, 'session_count' => 5, 'note' => 'old' ) );
+		$this->native( 1, 'login_count', '4' );
+
+		$this->migrate();
+
+		$row = $this->flat_row( 1 );
+		$this->assertSame( '4', $row['login_count'] );
+		$this->assertNull( $row['session_count'] );
+		$this->assertNull( $row['note'] );
+	}
+
+	public function test_a_required_column_without_a_native_row_keeps_its_default(): void {
+		$this->native( 1, 'login_count', '1' );
+
+		$report = $this->migrate();
+
+		$this->assertSame( 0, $report['errors'] );
+		$this->assertSame( '0', $this->flat_row( 1 )['req_flag'], 'NOT NULL column cannot hold NULL — its default is the documented stand-in' );
+	}
+
+	public function test_the_cron_batch_path_does_not_invent_defaults_either(): void {
+		$this->native( 1, 'login_count', '2' );
+
+		$result = TMDO_Entity_Migration_Engine::migrate_group_batch( 'user', 'md_act' );
+
+		$this->assertSame( 1, $result['migrated'] );
+		$this->assertNull( $this->flat_row( 1 )['session_count'] );
+	}
+}

tests/integration/GroupCompositeIndexTest.php

@@ -31,6 +31,10 @@ class GroupCompositeIndexTest extends TestCase {
 		$wpdb->query( 'CREATE TABLE `' . self::TABLE . '` ( id BIGINT NOT NULL AUTO_INCREMENT, post_id BIGINT NOT NULL, ci_flag BIGINT(20) DEFAULT NULL, ci_price DECIMAL(18,6) DEFAULT NULL, PRIMARY KEY (id), UNIQUE KEY uk_entity (post_id) ) ENGINE=InnoDB' );
 		$wpdb->query( 'INSERT INTO `' . self::TABLE . '` (post_id, ci_flag, ci_price) VALUES (1, 1, 10), (2, 0, 20)' );
 		$GLOBALS['_wp_options'] = array();
+		// Index DDL runs from WP-CLI / WP-Cron only (2.3 PR-090a); these tests act as one.
+		$GLOBALS['_wp_filter_callbacks']['tmdo_schema_ddl_allowed'] = array();
+		add_filter( 'tmdo_schema_ddl_allowed', static fn() => true );
+		$GLOBALS['_wp_scheduled_single'] = array();
 
 		$ref = new ReflectionProperty( WPDO_Schema_Manager::class, 'table_exists_cache' );
 		$ref->setAccessible( true );
@@ -53,6 +57,120 @@ class GroupCompositeIndexTest extends TestCase {
 		global $wpdb;
 		$wpdb->query( 'DROP TABLE IF EXISTS `' . self::TABLE . '`' );
 		WPDO_Entity_Registry::init();
+		$GLOBALS['_wp_filter_callbacks']['tmdo_schema_ddl_allowed'] = array();
+		unset( $GLOBALS['_wp_is_admin'], $GLOBALS['_wp_scheduled_single'] );
+	}
+
+	public function test_a_web_request_adds_no_index_and_leaves_it_to_wp_cron(): void {
+		$GLOBALS['_wp_filter_callbacks']['tmdo_schema_ddl_allowed'] = array();
+		foreach ( array( false, true ) as $is_admin ) { // /wp-admin/ runs init before auth_redirect().
+			$GLOBALS['_wp_is_admin'] = $is_admin;
+			$this->assertFalse( TMDO_Schema_Manager::ddl_allowed() );
+
+			TMDO_Schema_Manager::ensure_group_indexes( 'post', 'ci_core' );
+
+			$this->assertArrayNotHasKey( 'cidx_flag_price', $this->indexes(), 'no ALTER in a web request' );
+		}
+		$this->assertSame( array( 'post/ci_core' ), TMDO_Schema_Manager::pending_indexes() );
+		$this->assertContains( TMDO_Schema_Manager::INDEXES_HOOK, $GLOBALS['_wp_scheduled_single'] );
+
+		add_filter( 'tmdo_schema_ddl_allowed', static fn() => true ); // The cron run.
+		TMDO_Schema_Manager::ensure_pending_indexes();
+
+		$this->assertArrayHasKey( 'cidx_flag_price', $this->indexes() );
+		$this->assertSame( array(), TMDO_Schema_Manager::pending_indexes() );
+	}
+
+	public function test_the_ddl_decision_can_be_overridden(): void {
+		add_filter( 'tmdo_schema_ddl_allowed', static fn() => false );
+
+		TMDO_Schema_Manager::ensure_group_indexes( 'post', 'ci_core' );
+
+		$this->assertArrayNotHasKey( 'cidx_flag_price', $this->indexes() );
+	}
+
+	public function test_a_failed_alter_is_not_recorded_as_applied(): void {
+		global $wpdb;
+		$wpdb->query( 'ALTER TABLE `' . self::TABLE . '` ADD COLUMN ci_note TEXT DEFAULT NULL' );
+		WPDO_Entity_Registry::init();
+		WPDO_Entity_Registry::register_adapter( 'post', new WPDO_Adapter_Post() );
+		WPDO_Entity_Registry::register_group(
+			'post',
+			'ci_core',
+			array(
+				array( 'key' => 'ci_flag', 'type' => 'integer' ),
+				array( 'key' => 'ci_note', 'type' => 'textarea' ),
+			),
+			array( 'indexes' => array( 'flag_note' => array( 'ci_flag', 'ci_note' ) ) ) // TEXT without a prefix length: MySQL 1170.
+		);
+
+		TMDO_Schema_Manager::ensure_group_indexes( 'post', 'ci_core' );
+
+		$this->assertArrayNotHasKey( 'cidx_flag_note', $this->indexes() );
+		$this->assertFalse( get_option( TMDO_Schema_Manager::INDEXES_OPTION ), 'not recorded, so it is retried' );
+		$this->assertSame( array( 'post/ci_core' ), TMDO_Schema_Manager::pending_indexes() );
+	}
+
+	public function test_a_lock_held_by_another_process_skips_the_ddl_until_it_is_released(): void {
+		$other = new mysqli(
+			getenv( 'TMDO_TEST_DB_HOST' ) ?: '127.0.0.1',
+			getenv( 'TMDO_TEST_DB_USER' ) ?: 'dbo',
+			(string) getenv( 'TMDO_TEST_DB_PASS' ),
+			getenv( 'TMDO_TEST_DB_NAME' ) ?: 'wp_wpdo_test'
+		);
+		$name = $other->real_escape_string( TMDO_Schema_Manager::index_lock_name() );
+		$this->assertSame( '1', (string) $other->query( "SELECT GET_LOCK(MD5(CONCAT(DATABASE(), '{$name}')), 0)" )->fetch_row()[0] );
+
+		TMDO_Schema_Manager::ensure_group_indexes( 'post', 'ci_core' );
+		$this->assertArrayNotHasKey( 'cidx_flag_price', $this->indexes(), 'another process holds the lock' );
+
+		$other->query( "SELECT RELEASE_LOCK(MD5(CONCAT(DATABASE(), '{$name}')))" );
+		$other->close();
+		TMDO_Schema_Manager::ensure_group_indexes( 'post', 'ci_core' );
+
+		$this->assertArrayHasKey( 'cidx_flag_price', $this->indexes() );
+		$this->assertSame( array(), TMDO_Schema_Manager::pending_indexes() );
+		global $wpdb;
+		$this->assertSame( '1', (string) $wpdb->get_var( $wpdb->prepare( 'SELECT IS_FREE_LOCK(MD5(CONCAT(DATABASE(), %s)))', TMDO_Schema_Manager::index_lock_name() ) ), 'lock released' );
+	}
+
+	/**
+	 * Under read/write splitting (HyperDB, LudicrousDB) a SELECT may go to a
+	 * replica, where GET_LOCK would lock nothing: reads go to the primary first.
+	 */
+	public function test_the_lock_is_taken_on_the_primary_under_read_write_splitting(): void {
+		global $wpdb;
+		$real = $wpdb;
+		$wpdb = new class( $real ) {
+			/** @var string[] */
+			public array $calls = array();
+
+			public function __construct( private object $db ) {}
+
+			public function send_reads_to_masters(): void {
+				$this->calls[] = 'send_reads_to_masters';
+			}
+
+			public function __call( string $name, array $args ) {
+				if ( 'get_var' === $name && str_contains( (string) $args[0], 'GET_LOCK' ) ) {
+					$this->calls[] = 'GET_LOCK';
+				}
+				return $this->db->$name( ...$args );
+			}
+
+			public function __get( string $name ) {
+				return $this->db->$name;
+			}
+		};
+		try {
+			TMDO_Schema_Manager::ensure_group_indexes( 'post', 'ci_core' );
+			$calls = $wpdb->calls;
+		} finally {
+			$wpdb = $real;
+		}
+
+		$this->assertSame( array( 'send_reads_to_masters', 'GET_LOCK' ), $calls );
+		$this->assertArrayHasKey( 'cidx_flag_price', $this->indexes() );
 	}
 
 	/** @return array<string, string[]> index name → ordered columns */

tests/integration/HookBusIntegrationTest.php

@@ -202,14 +202,113 @@ class HookBusIntegrationTest extends TestCase {
 		$this->assertTrue( $result, 'aeav_only must return true to short-circuit EAV write' );
 	}
 
-	public function test_update_writes_flat_and_returns_null_in_dual_write_mode(): void {
+	/**
+	 * dual_write: the pre-filter only lets WP write native; flat is synced
+	 * from native afterwards (updated_/added_ actions → sync_from_native).
+	 */
+	public function test_update_leaves_flat_to_the_native_sync_in_dual_write_mode(): void {
+		global $wpdb;
 		self::set_user_mode( WPDO_Mode_Manager::MODE_DUAL_WRITE );
 		$GLOBALS['_wp_current_filter'] = 'update_user_metadata';
 
 		$result = WPDO_Hook_Bus::intercept_update( null, 3, 'first_name', 'Carol', '' );
 
-		$this->assertSame( 'Carol', $this->read_flat_first_name( 3 ) );
 		$this->assertNull( $result, 'dual_write must return null so WP continues to write EAV' );
+		$this->assertNull( $this->read_flat_first_name( 3 ), 'no flat write before native is written' );
+
+		$this->with_usermeta(
+			function () use ( $wpdb ) {
+				$wpdb->insert( $wpdb->usermeta, array( 'user_id' => 3, 'meta_key' => 'first_name', 'meta_value' => 'Carol' ) );
+
+				WPDO_Hook_Bus::sync_from_native( 'user', 3, 'first_name', 'Carol', 'update' );
+
+				$this->assertSame( 'Carol', $this->read_flat_first_name( 3 ) );
+			}
+		);
+	}
+
+	/**
+	 * A group whose table upgrade waits for WP-CLI / WP-Cron (2.3 PR-107)
+	 * stays native: its table may lack the new columns.
+	 */
+	public function test_a_group_waiting_for_its_table_upgrade_stays_native(): void {
+		global $wpdb;
+		self::set_user_mode( WPDO_Mode_Manager::MODE_DUAL_WRITE );
+		update_option( TMDO_Schema_Manager::DEFERRED_OPTION, array( 'user/core_profile' => time() ) );
+		try {
+			$this->with_usermeta(
+				function () use ( $wpdb ) {
+					$wpdb->insert( $wpdb->usermeta, array( 'user_id' => 4, 'meta_key' => 'first_name', 'meta_value' => 'Dora' ) );
+
+					WPDO_Hook_Bus::sync_from_native( 'user', 4, 'first_name', 'Dora', 'update' );
+
+					$this->assertNull( $this->read_flat_first_name( 4 ) );
+					$this->assertSame( 'Dora', WPDO_Hook_Bus::direct_read( 'user', 4, 'first_name' ), 'direct reads return the native value' );
+				}
+			);
+		} finally {
+			delete_option( TMDO_Schema_Manager::DEFERRED_OPTION );
+		}
+	}
+
+	/**
+	 * delete_all passes object ID 0: the delete_ action records the touched
+	 * users from the meta IDs, the deleted_ action re-syncs each to NULL.
+	 */
+	public function test_delete_all_resyncs_every_touched_entity_in_dual_write_mode(): void {
+		global $wpdb;
+		self::set_user_mode( WPDO_Mode_Manager::MODE_DUAL_WRITE );
+		$wpdb->insert( self::FLAT_TABLE, array( 'user_id' => 21, 'first_name' => 'A' ) );
+		$wpdb->insert( self::FLAT_TABLE, array( 'user_id' => 22, 'first_name' => 'B' ) );
+
+		$this->with_usermeta(
+			function () use ( $wpdb ) {
+				$wpdb->insert( $wpdb->usermeta, array( 'user_id' => 21, 'meta_key' => 'first_name', 'meta_value' => 'A' ) );
+				$mid_a = (int) $wpdb->insert_id;
+				$wpdb->insert( $wpdb->usermeta, array( 'user_id' => 22, 'meta_key' => 'first_name', 'meta_value' => 'B' ) );
+				$mid_b = (int) $wpdb->insert_id;
+
+				$GLOBALS['_wp_current_filter'] = 'delete_user_meta';
+				WPDO_Hook_Bus::before_meta_deleted( array( $mid_a, $mid_b ), 0, 'first_name', '' );
+				$wpdb->query( "DELETE FROM `{$wpdb->usermeta}` WHERE meta_key = 'first_name'" );
+				$GLOBALS['_wp_current_filter'] = 'deleted_user_meta';
+				WPDO_Hook_Bus::on_meta_deleted( array( $mid_a, $mid_b ), 0, 'first_name', '' );
+
+				$this->assertNull( $this->read_flat_first_name( 21 ) );
+				$this->assertNull( $this->read_flat_first_name( 22 ) );
+			}
+		);
+	}
+
+	/**
+	 * Deleting an entity drops its flat row first (adapter delete hook), then
+	 * WordPress deletes each meta row; syncing those deletions must not bring
+	 * the row back as all NULL.
+	 */
+	public function test_sync_of_a_deleted_key_does_not_recreate_a_missing_row(): void {
+		global $wpdb;
+		self::set_user_mode( WPDO_Mode_Manager::MODE_DUAL_WRITE );
+
+		$this->with_usermeta(
+			function () use ( $wpdb ) {
+				WPDO_Hook_Bus::sync_from_native( 'user', 31, 'first_name', 'Gone', 'delete' );
+
+				$this->assertSame( '0', $wpdb->get_var( 'SELECT COUNT(*) FROM `' . self::FLAT_TABLE . '` WHERE user_id = 31' ) );
+			}
+		);
+	}
+
+	/**
+	 * Run $fn with a native usermeta table, dropped afterwards.
+	 */
+	private function with_usermeta( callable $fn ): void {
+		global $wpdb;
+		$wpdb->query( "CREATE TABLE IF NOT EXISTS `{$wpdb->usermeta}` ( umeta_id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT, user_id BIGINT UNSIGNED NOT NULL DEFAULT 0, meta_key VARCHAR(255) DEFAULT NULL, meta_value LONGTEXT, PRIMARY KEY (umeta_id) ) ENGINE=InnoDB" );
+		try {
+			$fn();
+		} finally {
+			$wpdb->query( "DROP TABLE IF EXISTS `{$wpdb->usermeta}`" );
+		}
 	}
 
 	public function test_update_passthrough_for_unregistered_key(): void {
@@ -268,6 +367,30 @@ class HookBusIntegrationTest extends TestCase {
 		$this->assertNull( $result, 'dual_write does not read from flat — must return $check' );
 	}
 
+	/**
+	 * shadow_read serves native meta: update_metadata() reads the old value
+	 * through this filter, and serving the just-written flat value made WP
+	 * skip the native write (dev36, 2026-09-26). Flat is only compared.
+	 */
+	public function test_get_serves_native_in_shadow_read_mode_even_with_a_flat_value(): void {
+		global $wpdb;
+		$wpdb->insert( self::FLAT_TABLE, array( 'user_id' => 12, 'first_name' => 'Flat' ) );
+		self::set_user_mode( WPDO_Mode_Manager::MODE_SHADOW_READ );
+
+		foreach ( array( 0.0, 1.0 ) as $rate ) {
+			$GLOBALS['_wp_filter_callbacks']['tmdo_shadow_compare_sample_rate'] = array(
+				static function () use ( $rate ) {
+					return $rate;
+				},
+			);
+
+			$result = WPDO_Hook_Bus::intercept_get( null, 12, 'first_name', true, 'user' );
+
+			$this->assertNull( $result, "shadow_read must return \$check (sample rate {$rate})" );
+		}
+		unset( $GLOBALS['_wp_filter_callbacks']['tmdo_shadow_compare_sample_rate'] );
+	}
+
 	public function test_get_returns_empty_string_when_column_is_null(): void {
 		global $wpdb;
 		$wpdb->query(

tests/integration/NativeRestorerTest.php

@@ -139,4 +139,77 @@ class NativeRestorerTest extends TestCase {
 
 		$this->assertSame( array( '9' ), $this->native( 1, 'level' ) );
 	}
+
+	private function set_user_mode( string $mode ): void {
+		$GLOBALS['_wp_options']['wpdo_bridge_modes'] = array( 'user' => $mode );
+		TMDO_Mode_Manager::reset_cache();
+	}
+
+	/**
+	 * Native is the source of truth outside aeav_only (e.g. WooCommerce writes
+	 * stock with direct SQL): the default policy there only fills gaps.
+	 */
+	public function test_native_authoritative_modes_only_fill_missing_rows(): void {
+		$this->set_user_mode( 'dual_write' );
+
+		$report = TMDO_Native_Restorer::run( 'user', false );
+
+		$this->assertSame( array( '1' ), $this->native( 1, 'level' ), 'differing native value kept' );
+		$this->assertSame( array( serialize( array( 'a', 'b' ) ) ), $this->native( 1, 'tags' ), 'missing native row filled' );
+		$this->assertSame( array( '5' ), $this->native( 2, 'level' ) );
+		$this->assertSame( array( 'stale' ), $this->native( 2, 'tags' ), 'NULL flat value does not delete native here' );
+		$this->assertSame( 'only_missing', $report['policy'] );
+		$this->assertSame( 2, $report['groups']['rn_profile']['missing'] );
+		$this->assertSame( 2, $report['groups']['rn_profile']['differs'] );
+	}
+
+	public function test_overwrite_policy_replaces_native_in_any_mode(): void {
+		$this->set_user_mode( 'dual_write' );
+
+		TMDO_Native_Restorer::run( 'user', false, 500, false, '', 'overwrite' );
+
+		$this->assertSame( array( '3' ), $this->native( 1, 'level' ) );
+		$this->assertSame( array(), $this->native( 2, 'tags' ) );
+	}
+
+	public function test_only_missing_policy_keeps_native_in_aeav_only(): void {
+		TMDO_Native_Restorer::run( 'user', false, 500, false, '', 'only_missing' );
+
+		$this->assertSame( array( '1' ), $this->native( 1, 'level' ) );
+		$this->assertSame( array( serialize( array( 'a', 'b' ) ) ), $this->native( 1, 'tags' ) );
+	}
+
+	public function test_dry_run_classifies_without_writing(): void {
+		$report = TMDO_Native_Restorer::run( 'user', true );
+
+		$this->assertSame( 'overwrite', $report['policy'], 'aeav_only: flat is the source of truth' );
+		$this->assertSame( 2, $report['groups']['rn_profile']['missing'] );
+		$this->assertSame( 2, $report['groups']['rn_profile']['differs'] );
+		$this->assertSame( 0, $report['groups']['rn_profile']['same'] );
+		$this->assertSame( array( '1' ), $this->native( 1, 'level' ) );
+	}
+
+	/**
+	 * A flat column holding its field default for an entity that never had
+	 * the key (e.g. activity.session_count = 0) is not written back.
+	 */
+	public function test_defaults_are_not_invented_as_native_rows(): void {
+		global $wpdb;
+		$table = 'wp_itest_wpdo_user_rn_counts';
+		$wpdb->query( "DROP TABLE IF EXISTS `{$table}`" );
+		$wpdb->query( "CREATE TABLE `{$table}` ( id BIGINT NOT NULL AUTO_INCREMENT, user_id BIGINT NOT NULL, visits BIGINT(20) DEFAULT 0, updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP, PRIMARY KEY (id), UNIQUE KEY uk_entity (user_id) ) ENGINE=InnoDB" );
+		$wpdb->query( "INSERT INTO `{$table}` (user_id, visits, updated_at) VALUES (1, 0, '2020-01-01'), (2, 7, '2020-01-01')" );
+		WPDO_Entity_Registry::register_group( 'user', 'rn_counts', array( array( 'key' => 'visits', 'type' => 'integer', 'default' => 0 ) ) );
+		WPDO_Schema_Manager::flush_table_exists_cache();
+
+		try {
+			$report = TMDO_Native_Restorer::run( 'user', false, 500, false, 'rn_counts' );
+
+			$this->assertSame( array(), $this->native( 1, 'visits' ), 'default 0 not invented' );
+			$this->assertSame( array( '7' ), $this->native( 2, 'visits' ) );
+			$this->assertSame( 1, $report['groups']['rn_counts']['default_skipped'] );
+		} finally {
+			$wpdb->query( "DROP TABLE IF EXISTS `{$table}`" );
+		}
+	}
 }

tests/integration/PostBackfillJsonTest.php

@@ -215,6 +215,38 @@ class PostBackfillJsonTest extends TestCase {
 		$this->assertSame( 0, $result['errors'] ?? -1 );
 	}
 
+	// ── backfill_group() / backfillable_groups() (2.2 PR-067) ───────────────
+
+	public function test_backfill_group_fills_json_columns_instead_of_skipping_them(): void {
+		$this->seed_attachment( 1, array( 'width' => 640 ), 'Alt text' );
+
+		$result = WPDO_Post_Migration::backfill_group( 'attachment' );
+
+		$this->assertSame( 'attachment', $result['group'] );
+		global $wpdb;
+		$row = $wpdb->get_row( 'SELECT _wp_attachment_metadata, _wp_attachment_image_alt FROM `' . self::FLAT . '` WHERE post_id = 1', ARRAY_A );
+		$this->assertSame( array( 'width' => 640 ), json_decode( (string) $row['_wp_attachment_metadata'], true ), 'json field must not be left NULL by the bulk pivot' );
+		$this->assertSame( 'Alt text', $row['_wp_attachment_image_alt'] );
+	}
+
+	public function test_backfillable_groups_are_the_registered_post_groups(): void {
+		WPDO_Entity_Registry::register_group( 'post', 'itest_extra', array( array( 'key' => 'itest_extra_key', 'type' => 'text' ) ) );
+
+		$groups = WPDO_Post_Migration::backfillable_groups();
+
+		$this->assertSame( WPDO_Entity_Registry::get_groups_for_type( 'post' ), $groups );
+		$this->assertContains( 'itest_extra', $groups, 'a group registered by an add-on must be offered for backfill' );
+	}
+
+	public function test_restored_orphan_groups_are_never_backfilled(): void {
+		WPDO_Entity_Registry::restore_group( 'post', 'itest_orphan', array( array( 'key' => 'itest_orphan_key', 'type' => 'text' ) ) );
+		$this->assertContains( 'itest_orphan', WPDO_Entity_Registry::get_groups_for_type( 'post' ) );
+
+		$this->assertNotContains( 'itest_orphan', WPDO_Post_Migration::backfillable_groups(), 'orphan data lives only in the flat table' );
+		$this->expectException( InvalidArgumentException::class );
+		WPDO_Post_Migration::backfill_group( 'itest_orphan' );
+	}
+
 	public function test_returns_error_for_unknown_group(): void {
 		$result = WPDO_Post_Migration::backfill_group_json( 'bogus_group' );
 

tests/integration/PostEntityLifecycleTest.php

@@ -129,6 +129,7 @@ class PostEntityLifecycleTest extends TestCase {
 		WPDO_Entity_Registry::init();
 		WPDO_Entity_Registry::register_adapter( 'post', new WPDO_Adapter_Post() );
 		WPDO_Post_Fields::register_entity_fields();
+		tmdo_test_register_wc_product_group();
 	}
 
 	public static function tearDownAfterClass(): void {

tests/integration/PostMigrationTest.php

@@ -93,6 +93,7 @@ class PostMigrationTest extends TestCase {
 		WPDO_Entity_Registry::init();
 		WPDO_Entity_Registry::register_adapter( 'post', new WPDO_Adapter_Post() );
 		WPDO_Post_Fields::register_entity_fields();
+		tmdo_test_register_wc_product_group();
 	}
 
 	public static function tearDownAfterClass(): void {

tests/integration/PostQueryRouterCopyTest.php

@@ -31,7 +31,7 @@ class PostQueryRouterCopyTest extends TestCase {
 	protected function setUp(): void {
 		global $wpdb;
 		$wpdb->query( 'DROP TABLE IF EXISTS `' . self::TABLE . '`' );
-		$wpdb->query( 'CREATE TABLE `' . self::TABLE . "` ( id BIGINT NOT NULL AUTO_INCREMENT, post_id BIGINT NOT NULL, rc_price DECIMAL(18,6) DEFAULT NULL, post_status VARCHAR(20) DEFAULT NULL, post_date DATETIME DEFAULT NULL, PRIMARY KEY (id), UNIQUE KEY uk_entity (post_id), KEY idx_post_status_date (post_status, post_date) ) ENGINE=InnoDB" );
+		$wpdb->query( 'CREATE TABLE `' . self::TABLE . "` ( id BIGINT NOT NULL AUTO_INCREMENT, post_id BIGINT NOT NULL, rc_price DECIMAL(18,6) DEFAULT NULL, post_status VARCHAR(20) DEFAULT NULL, post_date DATETIME DEFAULT NULL, PRIMARY KEY (id), UNIQUE KEY uk_entity (post_id), KEY idx_post_status_date_id (post_status, post_date, post_id) ) ENGINE=InnoDB" );
 		$wpdb->query( 'INSERT INTO `' . self::TABLE . "` (post_id, rc_price, post_status, post_date) VALUES (1, 10, 'publish', '2026-01-01 00:00:00')" );
 
 		$GLOBALS['_wp_options']  = array( TMDO_Post_Status_Sync::OPTION => array( 'rc_core' => 'ready' ) );
@@ -58,14 +58,63 @@ class PostQueryRouterCopyTest extends TestCase {
 		$mode->setValue( null, null );
 	}
 
-	/** @return array{join:string, where:string, orderby:string, groupby:string} */
+	/**
+	 * The full request WordPress would build for the routed search, after posts_request.
+	 *
+	 * @param string $extra_join Another JOIN (a tax query's).
+	 * @param string $ties       ID tie-breaks plugins appended.
+	 */
+	private function request( string $extra_join = '', string $ties = ', {posts}.ID DESC, {posts}.ID DESC' ): string {
+		global $wpdb;
+		$ties  = str_replace( '{posts}', $wpdb->posts, $ties );
+		$query = new WP_Query();
+		foreach ( array(
+			'post_type'   => 'rc_item',
+			'post_status' => 'publish',
+			'meta_query'  => array( array( 'key' => 'rc_price', 'value' => array( 5, 20 ), 'compare' => 'BETWEEN', 'type' => 'NUMERIC' ) ),
+		) as $k => $v ) {
+			$query->set( $k, $v );
+		}
+		$router = new TMDO_Post_Query_Router();
+		$router->pre_get_posts( $query );
+		$request = 'SELECT SQL_CALC_FOUND_ROWS wp_posts.ID FROM wp_posts ' . $router->posts_join( $extra_join, $query )
+			. ' WHERE 1=1 ' . $router->posts_where( " AND wp_posts.post_status = 'publish'", $query )
+			. " GROUP BY {$wpdb->posts}.ID ORDER BY " . $router->posts_orderby( 'wp_posts.post_date DESC', $query ) . $ties . ' LIMIT 0, 10';
+		return $router->posts_request( $request, $query );
+	}
+
+	/**
+	 * 2.4 PR-128: with GROUP BY or a posts.ID tie-break MariaDB sorts every
+	 * match (dev36, 235k of 1.3M listings: 1.7 s); without them it walks
+	 * (post_status, post_date, post_id) backwards and stops at the LIMIT (3 ms).
+	 */
+	public function test_copy_route_orders_by_the_flat_date_and_post_id_without_group_by(): void {
+		$sql = $this->request();
+
+		$this->assertStringNotContainsString( 'GROUP BY', $sql, 'one flat row per post: nothing to collapse' );
+		$this->assertStringEndsWith( 'ORDER BY ' . self::ALIAS . '.`post_date` DESC, ' . self::ALIAS . '.`post_id` DESC LIMIT 0, 10', $sql );
+	}
+
+	public function test_copy_route_keeps_each_tie_break_direction(): void {
+		$this->assertStringEndsWith( 'ORDER BY ' . self::ALIAS . '.`post_date` DESC, ' . self::ALIAS . '.`post_id` ASC LIMIT 0, 10', $this->request( '', ', {posts}.ID ASC' ) );
+		$this->assertStringEndsWith( 'ORDER BY ' . self::ALIAS . '.`post_date` DESC LIMIT 0, 10', $this->request( '', '' ) );
+	}
+
+	public function test_copy_route_keeps_group_by_with_another_join(): void {
+		global $wpdb;
+		$sql = $this->request( " LEFT JOIN wp_term_relationships ON ({$wpdb->posts}.ID = wp_term_relationships.object_id)" );
+
+		$this->assertStringContainsString( "GROUP BY {$wpdb->posts}.ID", $sql );
+	}
+
+	/** @return array{join:string, where:string, orderby:string} */
 	private function sql( array $vars ): array {
 		$query = new WP_Query();
 		foreach ( array_merge(
 			array(
 				'post_type'   => 'rc_item',
 				'post_status' => 'publish',
-				'meta_query'  => array( array( 'key' => 'rc_price', 'value' => array( 5, 20 ), 'compare' => 'BETWEEN' ) ),
+				'meta_query'  => array( array( 'key' => 'rc_price', 'value' => array( 5, 20 ), 'compare' => 'BETWEEN', 'type' => 'NUMERIC' ) ),
 			),
 			$vars
 		) as $k => $v ) {
@@ -77,7 +126,6 @@ class PostQueryRouterCopyTest extends TestCase {
 			'join'    => $router->posts_join( '', $query ),
 			'where'   => $router->posts_where( " AND wp_posts.post_status = 'publish'", $query ),
 			'orderby' => $router->posts_orderby( 'wp_posts.post_date DESC', $query ),
-			'groupby' => $router->posts_groupby( '', $query ),
 		);
 	}
 
@@ -85,7 +133,6 @@ class PostQueryRouterCopyTest extends TestCase {
 		$this->assertStringContainsString( 'LEFT JOIN', $sql['join'] );
 		$this->assertStringNotContainsString( self::ALIAS . '.`post_status`', $sql['where'] );
 		$this->assertSame( 'wp_posts.post_date DESC', $sql['orderby'] );
-		$this->assertSame( '`wp_itest_posts`.`ID`', $sql['groupby'] );
 	}
 
 	public function test_ready_copies_filter_status_and_order_by_date_on_the_flat_table(): void {
@@ -95,7 +142,6 @@ class PostQueryRouterCopyTest extends TestCase {
 		$this->assertStringContainsString( self::ALIAS . ".`post_status` IN ('publish')", $sql['where'] );
 		$this->assertStringContainsString( "wp_posts.post_status = 'publish'", $sql['where'], 'WordPress status clause stays' );
 		$this->assertSame( self::ALIAS . '.`post_date` ASC', $sql['orderby'] );
-		$this->assertSame( '', $sql['groupby'], 'one row per post: no GROUP BY, so LIMIT can stop early' );
 	}
 
 	public function test_several_explicit_statuses_are_kept(): void {
@@ -123,4 +169,9 @@ class PostQueryRouterCopyTest extends TestCase {
 		$this->assert_legacy_shape( $this->sql( array( 'post_status' => '' ) ) );
 		$this->assert_legacy_shape( $this->sql( array( 'post_status' => 'any' ) ) );
 	}
+
+	public function test_not_exists_keeps_the_legacy_shape(): void {
+		// The INNER JOIN would drop posts without a flat row, which NOT EXISTS must match.
+		$this->assert_legacy_shape( $this->sql( array( 'meta_query' => array( array( 'key' => 'rc_price', 'compare' => 'NOT EXISTS' ) ) ) ) );
+	}
 }

tests/integration/PostQueryRouterDriftTest.php

@@ -0,0 +1,133 @@
+<?php
+declare(strict_types=1);
+
+use PHPUnit\Framework\TestCase;
+
+/**
+ * The post query router leaves a query native while the last drift-check
+ * found a routed clause's group out of step with native meta (2.2 PR-072).
+ * All or nothing: one drifting group keeps the whole query native. A group
+ * never checked keeps routing (decision 2026-09-27).
+ */
+class PostQueryRouterDriftTest extends TestCase {
+
+	public static function setUpBeforeClass(): void {
+		WPDO_Entity_Registry::init();
+		WPDO_Entity_Registry::register_adapter( 'post', new WPDO_Adapter_Post() );
+		WPDO_Post_Fields::register_entity_fields();
+		tmdo_test_register_wc_product_group();
+	}
+
+	public static function tearDownAfterClass(): void {
+		self::set_modes( null );
+		WPDO_Entity_Registry::init();
+	}
+
+	protected function setUp(): void {
+		$GLOBALS['_wp_options'] = array();
+		self::set_modes(
+			array(
+				'post'    => 'shadow_read',
+				'user'    => 'disabled',
+				'term'    => 'disabled',
+				'comment' => 'disabled',
+			)
+		);
+	}
+
+	private static function set_modes( ?array $modes ): void {
+		$cache = ( new ReflectionClass( WPDO_Mode_Manager::class ) )->getProperty( 'cache' );
+		$cache->setAccessible( true );
+		$cache->setValue( null, $modes );
+	}
+
+	private function drift( string $group, int $diff ): void {
+		$GLOBALS['_wp_options'][ TMDO_Drift_Check::OPTION ]['post'][ $group ] = array(
+			'miss'       => 0,
+			'diff'       => $diff,
+			'extra'      => 0,
+			'sample'     => 0,
+			'checked_at' => '2026-09-27 00:00:00',
+		);
+	}
+
+	private function price_query( array $extra = array() ): WP_Query {
+		$query = new WP_Query();
+		foreach ( array(
+			'post_type'  => 'product',
+			'meta_query' => array(
+				array( 'key' => '_price', 'value' => '50', 'compare' => '>=', 'type' => 'NUMERIC' ),
+			),
+		) + $extra as $k => $v ) {
+			$query->set( $k, $v );
+		}
+		return $query;
+	}
+
+	public function test_a_drifting_group_keeps_the_query_native(): void {
+		$this->drift( 'wc_product', 3 );
+		$query    = $this->price_query();
+		$original = $query->get( 'meta_query' );
+
+		( new WPDO_Post_Query_Router() )->pre_get_posts( $query );
+
+		$this->assertSame( $original, $query->get( 'meta_query' ) );
+		$this->assertSame( '', $query->get( 'wpdo_post_clauses' ) );
+	}
+
+	public function test_a_clean_group_is_routed(): void {
+		$this->drift( 'wc_product', 0 );
+		$query = $this->price_query();
+
+		( new WPDO_Post_Query_Router() )->pre_get_posts( $query );
+
+		$this->assertNotEmpty( $query->get( 'wpdo_post_clauses' ) );
+	}
+
+	public function test_a_group_never_checked_is_routed(): void {
+		$query = $this->price_query();
+
+		( new WPDO_Post_Query_Router() )->pre_get_posts( $query );
+
+		$this->assertNotEmpty( $query->get( 'wpdo_post_clauses' ) );
+	}
+
+	public function test_drift_in_another_group_does_not_matter(): void {
+		$this->drift( 'hp_listing_core', 5 );
+		$query = $this->price_query();
+
+		( new WPDO_Post_Query_Router() )->pre_get_posts( $query );
+
+		$this->assertNotEmpty( $query->get( 'wpdo_post_clauses' ) );
+	}
+
+	public function test_aeav_only_ignores_drift_because_native_is_stale_by_design(): void {
+		self::set_modes(
+			array(
+				'post'    => 'aeav_only',
+				'user'    => 'disabled',
+				'term'    => 'disabled',
+				'comment' => 'disabled',
+			)
+		);
+		$this->drift( 'wc_product', 3 );
+		$query = $this->price_query();
+
+		( new WPDO_Post_Query_Router() )->pre_get_posts( $query );
+
+		$this->assertNotEmpty( $query->get( 'wpdo_post_clauses' ) );
+	}
+
+	public function test_sorting_by_a_drifting_key_stays_native(): void {
+		$this->drift( 'wc_product', 1 );
+		$query = new WP_Query();
+		$query->set( 'post_type', 'product' );
+		$query->set( 'meta_key', '_price' );
+		$query->set( 'orderby', 'meta_value_num' );
+
+		( new WPDO_Post_Query_Router() )->pre_get_posts( $query );
+
+		$this->assertSame( '_price', $query->get( 'meta_key' ) );
+		$this->assertSame( '', $query->get( 'wpdo_post_sort' ) );
+	}
+}

tests/integration/PostQueryRouterFoundRowsTest.php

@@ -75,12 +75,12 @@ class PostQueryRouterFoundRowsTest extends TestCase {
 	}
 
 	/** A routed query plus the SQL WordPress would build for it (page size 1). */
-	private function routed(): array {
+	private function routed( array $clause = array( 'key' => 'fr_price', 'value' => 15, 'compare' => '>=', 'type' => 'NUMERIC' ) ): array {
 		global $wpdb;
 		$query = new WP_Query();
 		$query->set( 'post_type', 'fr_item' );
 		$query->set( 'post_status', 'publish' );
-		$query->set( 'meta_query', array( array( 'key' => 'fr_price', 'value' => 15, 'compare' => '>=' ) ) );
+		$query->set( 'meta_query', array( $clause ) );
 		$router = new TMDO_Post_Query_Router();
 		$router->pre_get_posts( $query );
 
@@ -90,6 +90,17 @@ class PostQueryRouterFoundRowsTest extends TestCase {
 		return array( $router, $query, $request );
 	}
 
+	public function test_a_group_waiting_for_its_table_upgrade_is_not_routed(): void {
+		$mode = new ReflectionProperty( WPDO_Mode_Manager::class, 'cache' );
+		$mode->setAccessible( true );
+		$mode->setValue( null, array( 'post' => 'shadow_read', 'user' => 'disabled', 'term' => 'disabled', 'comment' => 'disabled' ) );
+		update_option( TMDO_Schema_Manager::DEFERRED_OPTION, array( 'post/fr_core' => time() ) );
+
+		list( , $query ) = $this->routed();
+
+		$this->assertEmpty( $query->get( 'wpdo_post_clauses' ), 'kept native' );
+	}
+
 	public function test_routed_request_drops_sql_calc_found_rows(): void {
 		list( $router, $query, $request ) = $this->routed();
 
@@ -117,13 +128,85 @@ class PostQueryRouterFoundRowsTest extends TestCase {
 		$wpdb->query( 'UPDATE `' . self::TABLE . '` SET fr_price = 5 WHERE post_id = 2' );
 		$this->assertSame( '2', $wpdb->get_var( $router->found_posts_query( 'SELECT FOUND_ROWS()', $query ) ), 'cached' );
 
-		wp_cache_set_posts_last_changed();
+		wp_cache_set_posts_last_changed(); // Any post meta write, e.g. a theme's CSS descriptor on a page view.
+		$this->assertSame( '2', $wpdb->get_var( $router->found_posts_query( 'SELECT FOUND_ROWS()', $query ) ), 'still cached' );
+
+		TMDO_Post_Query_Router::bump_count_version(); // A post saved, or a managed key written.
 		$this->assertSame( '1', $wpdb->get_var( $router->found_posts_query( 'SELECT FOUND_ROWS()', $query ) ), 'recounted' );
 	}
 
+	/**
+	 * HivePress excludes a different random set of posts on each search page;
+	 * the total is the cached count without the exclusion minus a live count
+	 * of the excluded posts that match (by primary key).
+	 */
+	public function test_excluded_posts_do_not_split_the_cached_total(): void {
+		global $wpdb;
+		$count = function ( string $not_in ) use ( $wpdb ): string {
+			list( $router, $query, $request ) = $this->routed();
+			$request = str_replace( ' GROUP BY', " AND {$wpdb->posts}.ID NOT IN ({$not_in}) GROUP BY", $request );
+			$router->posts_request( $request, $query );
+			return (string) $wpdb->get_var( $router->found_posts_query( 'SELECT FOUND_ROWS()', $query ) );
+		};
+
+		$this->assertSame( '1', $count( '3' ), 'prices 20, 30 match; 3 excluded' );
+		$this->assertSame( '0', $count( '2,3' ) );
+
+		$wpdb->query( 'UPDATE `' . self::TABLE . '` SET fr_price = 5 WHERE post_id = 3' ); // Not seen until posts change.
+		$this->assertSame( '2', $count( '1' ), 'one cached count serves every exclusion list; 1 does not match' );
+		$this->assertSame( '1', $count( '2' ) );
+
+		TMDO_Post_Query_Router::bump_count_version();
+		$this->assertSame( '0', $count( '2' ), 'recounted' );
+	}
+
+	/**
+	 * Keyword searches carry wpdb's placeholder escape for "%", which changes
+	 * with every request: the cache key uses the SQL without it, or no search
+	 * with a keyword ever hits the cached count.
+	 */
+	public function test_the_cached_count_survives_a_new_placeholder_escape(): void {
+		global $wpdb;
+		$real = $wpdb;
+		$wpdb = new class( $real ) {
+			public int $counts = 0;
+
+			public function __construct( private object $db ) {}
+
+			public function remove_placeholder_escape( string $sql ): string {
+				return (string) preg_replace( '/\{[0-9a-f]{8}\}/', '%', $sql );
+			}
+
+			public function __call( string $name, array $args ) {
+				if ( 'get_var' === $name && str_contains( (string) $args[0], 'COUNT(*)' ) ) {
+					++$this->counts;
+				}
+				return $this->db->$name( ...$args );
+			}
+
+			public function __get( string $name ) {
+				return $this->db->$name;
+			}
+		};
+		try {
+			foreach ( array( '{1a2b3c4d}', '{9f8e7d6c}' ) as $escape ) { // Two requests.
+				list( $router, $query, $request ) = $this->routed();
+				$request = str_replace( ' GROUP BY', " AND '{$escape}' = '{$escape}' GROUP BY", $request );
+				$router->posts_request( $request, $query );
+				$this->assertSame( '2', $real->get_var( $router->found_posts_query( 'SELECT FOUND_ROWS()', $query ) ) );
+			}
+			$counts = $wpdb->counts;
+		} finally {
+			$wpdb = $real;
+		}
+
+		$this->assertSame( 1, $counts, 'counted once' );
+	}
+
 	public function test_flat_writes_and_deletes_move_posts_last_changed(): void {
 		$GLOBALS['_wp_current_filter'] = 'update_post_metadata';
 		$before                        = wp_cache_get_last_changed( 'posts' );
+		$version                       = wp_cache_get_last_changed( TMDO_Post_Query_Router::COUNT_VERSION_GROUP );
 		WPDO_Hook_Bus::intercept_update( null, 1, 'fr_price', '11', '' );
 		$after_write = wp_cache_get_last_changed( 'posts' );
 
@@ -132,5 +215,146 @@ class PostQueryRouterFoundRowsTest extends TestCase {
 
 		$this->assertNotSame( $before, $after_write );
 		$this->assertNotSame( $after_write, wp_cache_get_last_changed( 'posts' ) );
+		$this->assertNotSame( $version, wp_cache_get_last_changed( TMDO_Post_Query_Router::COUNT_VERSION_GROUP ), 'routed counts follow flat writes' );
+	}
+
+	// ── flat-first: a filtered search ordered by a flat column ─────────────
+
+	/**
+	 * A routed search ordered by the flat price (named clause), with the
+	 * posts.ID tie-break a plugin such as HivePress appends.
+	 *
+	 * @return array{0:TMDO_Post_Query_Router, 1:WP_Query, 2:string}
+	 */
+	private function sorted( string $compare = '>=', string $order = 'DESC' ): array {
+		global $wpdb;
+		$query = new WP_Query();
+		$query->set( 'post_type', 'fr_item' );
+		$query->set( 'post_status', 'publish' );
+		$query->set( 'meta_query', array( 'price' => array( 'key' => 'fr_price', 'value' => 15, 'compare' => $compare, 'type' => 'NUMERIC' ) ) );
+		$query->set( 'orderby', 'price' );
+		$query->set( 'order', $order );
+		$router = new TMDO_Post_Query_Router();
+		$router->pre_get_posts( $query );
+
+		$request = "SELECT SQL_CALC_FOUND_ROWS {$wpdb->posts}.ID FROM {$wpdb->posts} " . $router->posts_join( '', $query )
+			. " WHERE 1=1 AND {$wpdb->posts}.post_type = 'fr_item' AND (({$wpdb->posts}.post_status = 'publish'))" . $router->posts_where( '', $query )
+			. ' ORDER BY ' . $router->posts_orderby( '', $query ) . ", {$wpdb->posts}.ID DESC LIMIT 0, 10";
+		return array( $router, $query, $request );
+	}
+
+	public function test_sorted_filtered_request_drives_from_the_flat_table_with_the_same_rows(): void {
+		global $wpdb;
+		list( $router, $query, $request ) = $this->sorted();
+
+		$sql = $router->posts_request( $request, $query );
+
+		$this->assertStringStartsWith( 'SELECT STRAIGHT_JOIN ', $sql );
+		$this->assertStringContainsString( 'FROM `' . self::TABLE . '` AS `wpdoflat_fr_item_fr_core` INNER JOIN ' . $wpdb->posts . ' ON', $sql );
+		$this->assertStringNotContainsString( 'LEFT JOIN `' . self::TABLE . '`', $sql );
+		$this->assertStringEndsWith( 'ORDER BY `wpdoflat_fr_item_fr_core`.`fr_price` DESC, `wpdoflat_fr_item_fr_core`.`post_id` DESC LIMIT 0, 10', $sql, 'posts.ID tie-breaks read the flat post_id, once' );
+		$this->assertSame( array( '3', '2' ), $wpdb->get_col( $sql ) );
+		$this->assertSame( $wpdb->get_col( str_replace( 'SQL_CALC_FOUND_ROWS ', '', $request ) ), $wpdb->get_col( $sql ) );
+	}
+
+	/**
+	 * The ID tie-break follows the sort direction, so a (column, post_id)
+	 * index returns rows in order with no filesort (2.4 PR-118); ties are
+	 * ordered by ID the same way as the column.
+	 */
+	public function test_flat_first_tie_break_follows_the_sort_direction(): void {
+		global $wpdb;
+		list( $router, $query, $request ) = $this->sorted( '>=', 'ASC' );
+
+		$sql = $router->posts_request( $request, $query );
+
+		$this->assertStringEndsWith( 'ORDER BY `wpdoflat_fr_item_fr_core`.`fr_price` ASC, `wpdoflat_fr_item_fr_core`.`post_id` ASC LIMIT 0, 10', $sql );
+		$this->assertSame( array( '2', '3' ), $wpdb->get_col( $sql ) );
+	}
+
+	public function test_date_ordered_filtered_request_keeps_wordpress_join_order(): void {
+		list( $router, $query, $request ) = $this->routed();
+
+		$this->assertStringStartsNotWith( 'SELECT STRAIGHT_JOIN', $router->posts_request( $request, $query ) );
+	}
+
+	public function test_flat_first_needs_a_condition_that_rejects_posts_without_a_flat_row(): void {
+		list( $router, $query, $request ) = $this->sorted( 'NOT EXISTS' );
+
+		$this->assertStringStartsNotWith( 'SELECT STRAIGHT_JOIN', $router->posts_request( $request, $query ) );
+	}
+
+	public function test_flat_first_is_skipped_for_selective_post_filters(): void {
+		list( $router, $query, $request ) = $this->sorted();
+		$query->set( 'post__in', array( 2 ) );
+
+		$this->assertStringStartsNotWith( 'SELECT STRAIGHT_JOIN', $router->posts_request( $request, $query ) );
+	}
+
+	public function test_flat_first_can_be_turned_off(): void {
+		list( $router, $query, $request ) = $this->sorted();
+		$off = static fn() => false;
+		add_filter( 'tmdo_router_flat_first', $off );
+		try {
+			$this->assertStringStartsNotWith( 'SELECT STRAIGHT_JOIN', $router->posts_request( $request, $query ) );
+		} finally {
+			remove_filter( 'tmdo_router_flat_first', $off );
+		}
+	}
+
+	public function test_flat_first_keeps_the_split_query(): void {
+		global $wpdb;
+		list( $router, $query, $request ) = $this->sorted();
+		$old_request    = str_replace( "{$wpdb->posts}.ID FROM", "{$wpdb->posts}.* FROM", $request );
+		$query->request = $router->posts_request( $old_request, $query );
+		$query->set( 'posts_per_page', 10 );
+
+		$this->assertStringStartsWith( 'SELECT STRAIGHT_JOIN ', $query->request );
+		$this->assertTrue( $router->split_the_query( false, $query, $old_request, array( 'fields' => "{$wpdb->posts}.*", 'limits' => 'LIMIT 0, 10' ) ) );
+	}
+
+	// ── split query: IDs first, then cached post objects ──────────────────
+
+	/**
+	 * WordPress's full-row request for a routed query, before and after posts_request.
+	 *
+	 * @return array{0:TMDO_Post_Query_Router, 1:WP_Query, 2:string, 3:array<string, string>}
+	 */
+	private function full_rows(): array {
+		global $wpdb;
+		list( $router, $query, $request ) = $this->routed();
+		$old_request    = str_replace( "{$wpdb->posts}.ID FROM", "{$wpdb->posts}.* FROM", $request );
+		$query->request = $router->posts_request( $old_request, $query );
+		$query->set( 'posts_per_page', 1 );
+		return array( $router, $query, $old_request, array( 'fields' => "{$wpdb->posts}.*", 'limits' => 'LIMIT 0, 1' ) );
+	}
+
+	public function test_routed_full_row_request_is_still_split(): void {
+		list( $router, $query, $old_request, $clauses ) = $this->full_rows();
+
+		$this->assertTrue( $router->split_the_query( false, $query, $old_request, $clauses ) );
+	}
+
+	public function test_request_changed_by_others_is_not_split(): void {
+		list( $router, $query, $old_request, $clauses ) = $this->full_rows();
+		$query->request .= ' /* another plugin */';
+
+		$this->assertFalse( $router->split_the_query( false, $query, $old_request, $clauses ) );
+	}
+
+	public function test_unrouted_query_keeps_the_core_decision(): void {
+		$router = new TMDO_Post_Query_Router();
+
+		$this->assertFalse( $router->split_the_query( false, new WP_Query(), 'SELECT 1', array( 'fields' => 'wp_itest_posts.*', 'limits' => 'LIMIT 0, 1' ) ) );
+		$this->assertTrue( $router->split_the_query( true, new WP_Query(), 'SELECT 1', array() ) );
+	}
+
+	public function test_split_id_request_goes_through_posts_request_too(): void {
+		unset( $GLOBALS['_wp_filter_callbacks']['posts_request_ids'], $GLOBALS['_wp_filter_callbacks']['split_the_query'] );
+		$router = new TMDO_Post_Query_Router();
+		$router->register_hooks();
+
+		$this->assertContains( array( $router, 'posts_request' ), $GLOBALS['_wp_filter_callbacks']['posts_request_ids'] ?? array() );
+		$this->assertContains( array( $router, 'split_the_query' ), $GLOBALS['_wp_filter_callbacks']['split_the_query'] ?? array() );
 	}
 }

tests/integration/PostQueryRouterOrderTest.php

@@ -0,0 +1,139 @@
+<?php
+declare(strict_types=1);
+
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Meta orderby on the flat table: the "sort by an attribute, keep posts
+ * without it" shape (relation OR of NOT EXISTS + EXISTS on one key, named
+ * clause in orderby — HivePress search sorting), orderby on a named routed
+ * clause, and meta_key + meta_value(_num).
+ *
+ * Only when the flat column orders the way native CASTs meta_value;
+ * otherwise the whole query stays native.
+ */
+class PostQueryRouterOrderTest extends TestCase {
+
+	private const ALIAS = '`wpdoflat_product_wc_product`';
+
+	public static function setUpBeforeClass(): void {
+		WPDO_Entity_Registry::init();
+		WPDO_Entity_Registry::register_adapter( 'post', new WPDO_Adapter_Post() );
+		WPDO_Post_Fields::register_entity_fields();
+		tmdo_test_register_wc_product_group();
+	}
+
+	protected function setUp(): void {
+		$cache = new ReflectionProperty( WPDO_Mode_Manager::class, 'cache' );
+		$cache->setAccessible( true );
+		$cache->setValue( null, array( 'post' => 'aeav_only', 'user' => 'disabled', 'term' => 'disabled', 'comment' => 'disabled' ) );
+	}
+
+	public static function tearDownAfterClass(): void {
+		$cache = new ReflectionProperty( WPDO_Mode_Manager::class, 'cache' );
+		$cache->setAccessible( true );
+		$cache->setValue( null, null );
+		WPDO_Entity_Registry::init();
+	}
+
+	/**
+	 * @param array<string, mixed> $vars Query vars (post_type defaults to product).
+	 * @return array{query:WP_Query, join:string, where:string, orderby:string}
+	 */
+	private function route( array $vars ): array {
+		$query = new WP_Query();
+		foreach ( $vars + array( 'post_type' => 'product' ) as $k => $v ) {
+			$query->set( $k, $v );
+		}
+		$router = new TMDO_Post_Query_Router();
+		$router->pre_get_posts( $query );
+		return array(
+			'query'   => $query,
+			'join'    => $router->posts_join( '', $query ),
+			'where'   => $router->posts_where( '', $query ),
+			'orderby' => $router->posts_orderby( 'wp_posts.post_date DESC', $query ),
+		);
+	}
+
+	/**
+	 * @param string $type Clause type.
+	 * @return array<int|string, mixed>
+	 */
+	private function sort_shape( string $type ): array {
+		return array(
+			array(
+				'relation'     => 'OR',
+				'price__order' => array( 'key' => '_price', 'type' => $type, 'compare' => 'NOT EXISTS' ),
+				array( 'key' => '_price', 'type' => $type, 'compare' => 'EXISTS' ),
+			),
+		);
+	}
+
+	public function test_sort_shape_left_joins_and_orders_by_the_flat_column_without_filtering(): void {
+		$sql = $this->route( array( 'meta_query' => $this->sort_shape( 'DECIMAL' ), 'orderby' => 'price__order', 'order' => 'ASC' ) );
+
+		$this->assertSame( array(), $sql['query']->get( 'meta_query' ), 'sort group removed from the native meta_query' );
+		$this->assertStringContainsString( 'LEFT JOIN `wp_itest_wpdo_post_wc_product` AS ' . self::ALIAS, $sql['join'] );
+		$this->assertStringNotContainsString( '_price', $sql['where'], 'every post matches: no condition' );
+		$this->assertStringStartsWith( self::ALIAS . '.`_price` ASC', $sql['orderby'] );
+	}
+
+	public function test_sort_shape_with_char_type_on_a_numeric_column_stays_native(): void {
+		$vars = array( 'meta_query' => $this->sort_shape( 'CHAR' ), 'orderby' => 'price__order', 'order' => 'ASC' );
+		$sql  = $this->route( $vars );
+
+		$this->assertSame( $vars['meta_query'], $sql['query']->get( 'meta_query' ) );
+		$this->assertSame( 'wp_posts.post_date DESC', $sql['orderby'] );
+	}
+
+	public function test_orderby_on_a_named_routed_clause_orders_by_its_column(): void {
+		$sql = $this->route(
+			array(
+				'meta_query' => array( 'price' => array( 'key' => '_price', 'compare' => 'EXISTS', 'type' => 'NUMERIC' ) ),
+				'orderby'    => array( 'price' => 'DESC' ),
+			)
+		);
+
+		$this->assertStringContainsString( self::ALIAS . '.`_price` IS NOT NULL', $sql['where'] );
+		$this->assertStringStartsWith( self::ALIAS . '.`_price` DESC', $sql['orderby'] );
+	}
+
+	public function test_orderby_naming_a_routed_clause_among_other_keys_stays_native(): void {
+		$vars = array(
+			'meta_query' => array( 'price' => array( 'key' => '_price', 'compare' => 'EXISTS', 'type' => 'NUMERIC' ) ),
+			'orderby'    => array( 'price' => 'DESC', 'title' => 'ASC' ),
+		);
+		$sql  = $this->route( $vars );
+
+		$this->assertSame( $vars['meta_query'], $sql['query']->get( 'meta_query' ) );
+		$this->assertSame( 'wp_posts.post_date DESC', $sql['orderby'] );
+	}
+
+	public function test_meta_value_num_on_a_numeric_key_requires_the_key_and_orders_by_its_column(): void {
+		$sql = $this->route( array( 'meta_key' => '_price', 'orderby' => 'meta_value_num', 'order' => 'DESC' ) );
+
+		$this->assertSame( '', $sql['query']->get( 'meta_key' ), 'primary meta clause taken over' );
+		$this->assertStringContainsString( self::ALIAS . '.`_price` IS NOT NULL', $sql['where'], 'native INNER JOIN drops posts without the key' );
+		$this->assertStringStartsWith( self::ALIAS . '.`_price` DESC', $sql['orderby'] );
+	}
+
+	public function test_meta_value_on_a_string_key_is_routed(): void {
+		$sql = $this->route( array( 'meta_key' => '_sku', 'orderby' => 'meta_value', 'order' => 'ASC' ) );
+
+		$this->assertStringStartsWith( self::ALIAS . '.`_sku` ASC', $sql['orderby'] );
+	}
+
+	public function test_meta_value_on_a_numeric_key_stays_native(): void {
+		$sql = $this->route( array( 'meta_key' => '_price', 'orderby' => 'meta_value', 'order' => 'ASC' ) );
+
+		$this->assertSame( '_price', $sql['query']->get( 'meta_key' ), 'native string order' );
+		$this->assertSame( 'wp_posts.post_date DESC', $sql['orderby'] );
+	}
+
+	public function test_meta_key_with_a_meta_value_filter_stays_native(): void {
+		$sql = $this->route( array( 'meta_key' => '_price', 'meta_value' => '5', 'orderby' => 'meta_value_num' ) );
+
+		$this->assertSame( '_price', $sql['query']->get( 'meta_key' ) );
+		$this->assertSame( 'wp_posts.post_date DESC', $sql['orderby'] );
+	}
+}

tests/integration/PostQueryRouterTest.php

@@ -39,6 +39,7 @@ class PostQueryRouterTest extends TestCase {
 		WPDO_Entity_Registry::init();
 		WPDO_Entity_Registry::register_adapter( 'post', new WPDO_Adapter_Post() );
 		WPDO_Post_Fields::register_entity_fields();
+		tmdo_test_register_wc_product_group();
 	}
 
 	public static function tearDownAfterClass(): void {
@@ -78,7 +79,7 @@ class PostQueryRouterTest extends TestCase {
 		$query  = $this->make_query( array(
 			'post_type'  => 'product',
 			'meta_query' => array(
-				array( 'key' => '_price', 'value' => '50', 'compare' => '>=' ),
+				array( 'key' => '_price', 'value' => '50', 'compare' => '>=', 'type' => 'NUMERIC' ),
 			),
 		) );
 		$original = $query->get( 'meta_query' );
@@ -100,7 +101,7 @@ class PostQueryRouterTest extends TestCase {
 		$query  = $this->make_query( array(
 			'post_type'  => 'product',
 			'meta_query' => array(
-				array( 'key' => '_price', 'value' => '50', 'compare' => '>=' ),
+				array( 'key' => '_price', 'value' => '50', 'compare' => '>=', 'type' => 'NUMERIC' ),
 			),
 		) );
 		$original = $query->get( 'meta_query' );
@@ -123,7 +124,7 @@ class PostQueryRouterTest extends TestCase {
 		$query  = $this->make_query( array(
 			'post_type'  => 'product',
 			'meta_query' => array(
-				array( 'key' => '_price', 'value' => '50', 'compare' => '>=' ),
+				array( 'key' => '_price', 'value' => '50', 'compare' => '>=', 'type' => 'NUMERIC' ),
 			),
 		) );
 
@@ -149,7 +150,7 @@ class PostQueryRouterTest extends TestCase {
 		$query  = $this->make_query( array(
 			'post_type'  => 'product',
 			'meta_query' => array(
-				array( 'key' => '_price', 'value' => '50', 'compare' => '>=' ),
+				array( 'key' => '_price', 'value' => '50', 'compare' => '>=', 'type' => 'NUMERIC' ),
 				array( 'key' => 'unmanaged_attr', 'value' => 'x' ),
 			),
 		) );
@@ -177,7 +178,7 @@ class PostQueryRouterTest extends TestCase {
 		$query  = $this->make_query( array(
 			'post_type'  => 'product',
 			'meta_query' => array(
-				array( 'key' => '_price', 'value' => '50', 'compare' => '>=' ),
+				array( 'key' => '_price', 'value' => '50', 'compare' => '>=', 'type' => 'NUMERIC' ),
 			),
 		) );
 		$original = $query->get( 'meta_query' );
@@ -202,7 +203,7 @@ class PostQueryRouterTest extends TestCase {
 		$query  = $this->make_query( array(
 			'post_type'         => 'product',
 			'meta_query'        => array(
-				array( 'key' => '_price', 'value' => '50' ),
+				array( 'key' => '_price', 'value' => '50', 'type' => 'NUMERIC' ),
 			),
 			'wpdo_post_clauses' => array(),
 		) );
@@ -214,6 +215,34 @@ class PostQueryRouterTest extends TestCase {
 		$this->assertStringContainsString( 'wpdo_post_wc_product', $join );
 	}
 
+	public function test_posts_join_joins_every_routed_group(): void {
+		$this->set_post_mode( 'aeav_only' );
+
+		$router = new WPDO_Post_Query_Router();
+		$query  = $this->make_query( array(
+			'post_type'  => 'product',
+			'meta_query' => array(
+				array( 'key' => '_price', 'value' => '50', 'compare' => '>=', 'type' => 'NUMERIC' ),
+				array( 'key' => '_thumbnail_id', 'compare' => 'EXISTS' ),
+			),
+		) );
+
+		$router->pre_get_posts( $query );
+		$join  = $router->posts_join( '', $query );
+		$where = $router->posts_where( '', $query );
+
+		$this->assertStringContainsString( 'wpdo_post_wc_product', $join );
+		$this->assertStringContainsString( 'wpdo_post_wp_core', $join );
+		$this->assertStringContainsString( '`wpdoflat_product_wp_core`.`_thumbnail_id` IS NOT NULL', $where );
+	}
+
+	public function test_no_group_by_is_added_for_one_row_per_post_joins(): void {
+		unset( $GLOBALS['_wp_filter_callbacks']['posts_groupby'] );
+		( new WPDO_Post_Query_Router() )->register_hooks();
+
+		$this->assertEmpty( $GLOBALS['_wp_filter_callbacks']['posts_groupby'] ?? array() );
+	}
+
 	public function test_posts_where_appends_condition_for_routed_clause(): void {
 		$this->set_post_mode( 'aeav_only' );
 
@@ -221,7 +250,7 @@ class PostQueryRouterTest extends TestCase {
 		$query  = $this->make_query( array(
 			'post_type'  => 'product',
 			'meta_query' => array(
-				array( 'key' => '_price', 'value' => '99', 'compare' => '=' ),
+				array( 'key' => '_price', 'value' => '99', 'compare' => '=', 'type' => 'NUMERIC' ),
 			),
 		) );
 
@@ -242,4 +271,212 @@ class PostQueryRouterTest extends TestCase {
 
 		$this->assertSame( '', $query->get( 'wpdo_post_clauses' ) );
 	}
+
+	// ── all-or-nothing: native unless every registered clause is routable ────
+
+	/**
+	 * Run pre_get_posts in aeav_only and assert the query was left to WordPress.
+	 *
+	 * @param array<string, mixed> $vars Query vars.
+	 */
+	private function assert_not_routed( array $vars, string $why ): void {
+		$this->set_post_mode( 'aeav_only' );
+		$query = $this->make_query( $vars );
+		( new WPDO_Post_Query_Router() )->pre_get_posts( $query );
+
+		$this->assertSame( $vars['meta_query'], $query->get( 'meta_query' ), $why . ': meta_query untouched.' );
+		$this->assertSame( '', $query->get( 'wpdo_post_clauses' ), $why . ': nothing routed.' );
+	}
+
+	public function test_or_relation_is_not_routed(): void {
+		$this->assert_not_routed(
+			array(
+				'post_type'  => 'product',
+				'meta_query' => array(
+					'relation' => 'OR',
+					array( 'key' => '_stock', 'value' => '1' ),
+					array( 'key' => '_sku', 'value' => 'x' ),
+				),
+			),
+			'OR'
+		);
+	}
+
+	public function test_several_post_types_are_not_routed(): void {
+		$this->assert_not_routed(
+			array(
+				'post_type'  => array( 'product', 'post' ),
+				'meta_query' => array( array( 'key' => '_price', 'value' => '5', 'compare' => '>=', 'type' => 'NUMERIC' ) ),
+			),
+			'several post types'
+		);
+	}
+
+	public function test_untyped_range_on_a_numeric_column_is_not_routed(): void {
+		$this->assert_not_routed(
+			array(
+				'post_type'  => 'product',
+				'meta_query' => array( array( 'key' => '_price', 'value' => '9000', 'compare' => '>' ) ),
+			),
+			'CHAR > on DECIMAL'
+		);
+	}
+
+	public function test_untyped_equality_on_a_decimal_column_is_not_routed(): void {
+		$this->assert_not_routed(
+			array(
+				'post_type'  => 'product',
+				'meta_query' => array( array( 'key' => '_price', 'value' => '10' ) ),
+			),
+			'CHAR = on DECIMAL (native "10.00" != "10")'
+		);
+	}
+
+	public function test_numeric_type_on_a_text_column_is_not_routed(): void {
+		$this->assert_not_routed(
+			array(
+				'post_type'  => 'product',
+				'meta_query' => array( array( 'key' => '_sku', 'value' => '5', 'compare' => '>', 'type' => 'NUMERIC' ) ),
+			),
+			'NUMERIC on VARCHAR'
+		);
+	}
+
+	public function test_unknown_compare_is_not_routed(): void {
+		$this->assert_not_routed(
+			array(
+				'post_type'  => 'product',
+				'meta_query' => array( array( 'key' => '_sku', 'value' => '^a', 'compare' => 'REGEXP' ) ),
+			),
+			'REGEXP'
+		);
+	}
+
+	public function test_one_unroutable_registered_clause_keeps_the_whole_query_native(): void {
+		$this->assert_not_routed(
+			array(
+				'post_type'  => 'product',
+				'meta_query' => array(
+					array( 'key' => '_stock', 'value' => '3', 'compare' => '>=', 'type' => 'NUMERIC' ),
+					array( 'key' => '_price', 'value' => '9000', 'compare' => '>' ),
+				),
+			),
+			'one unroutable clause'
+		);
+	}
+
+	public function test_nested_group_with_a_registered_key_is_not_routed(): void {
+		$this->assert_not_routed(
+			array(
+				'post_type'  => 'product',
+				'meta_query' => array(
+					array( 'key' => '_stock', 'value' => '3', 'compare' => '>=', 'type' => 'NUMERIC' ),
+					array(
+						'relation' => 'OR',
+						array( 'key' => '_price', 'compare' => 'NOT EXISTS' ),
+						array( 'key' => '_price', 'compare' => 'EXISTS' ),
+					),
+				),
+			),
+			'nested group'
+		);
+	}
+
+	public function test_untyped_integer_equality_on_an_integer_column_is_routed(): void {
+		$this->set_post_mode( 'aeav_only' );
+		$query = $this->make_query(
+			array(
+				'post_type'  => 'product',
+				'meta_query' => array(
+					array( 'key' => '_stock', 'value' => '3' ),
+					array( 'key' => 'unmanaged_attr', 'value' => 'x' ),
+				),
+			)
+		);
+		( new WPDO_Post_Query_Router() )->pre_get_posts( $query );
+
+		$this->assertNotEmpty( $query->get( 'wpdo_post_clauses' ) );
+		$this->assertCount( 1, $query->get( 'meta_query' ), 'unregistered AND clause stays native' );
+	}
+
+	public function test_like_matches_an_escaped_substring(): void {
+		$this->set_post_mode( 'aeav_only' );
+		$router = new WPDO_Post_Query_Router();
+		$query  = $this->make_query(
+			array(
+				'post_type'  => 'product',
+				'meta_query' => array( array( 'key' => '_sku', 'value' => 'B1_1%', 'compare' => 'LIKE' ) ),
+			)
+		);
+		$router->pre_get_posts( $query );
+
+		$this->assertStringContainsString( "LIKE '%B1\\\\_1\\\\%%'", $router->posts_where( '', $query ) );
+	}
+
+	/**
+	 * A clause with no value tests only that the key exists (WP_Meta_Query adds
+	 * a value condition only when 'value' is set), so it routes as EXISTS.
+	 * HivePress's featured-listing lookup on every search page is one:
+	 * array( 'key' => 'hp_featured' ) — it kept the whole query native (2.4 PR-122).
+	 */
+	public function test_a_clause_without_a_value_routes_as_exists(): void {
+		$this->set_post_mode( 'aeav_only' );
+		$router = new WPDO_Post_Query_Router();
+		$query  = $this->make_query(
+			array(
+				'post_type'  => 'product',
+				'meta_query' => array(
+					array( 'key' => '_stock' ),
+					array( 'key' => '_price', 'value' => array( 10, 20 ), 'compare' => 'BETWEEN', 'type' => 'NUMERIC' ),
+				),
+			)
+		);
+		$router->pre_get_posts( $query );
+
+		$this->assertEmpty( $query->get( 'meta_query' ), 'both clauses routed' );
+		$this->assertStringContainsString( '`_stock` IS NOT NULL', $router->posts_where( '', $query ) );
+	}
+
+	/**
+	 * HivePress's featured-listing lookup (Attribute::set_search_query()): the
+	 * search's meta query, including its sort group, plus meta_key hp_featured,
+	 * ordered at random. The sort group (key NOT EXISTS OR key EXISTS) matches
+	 * every post, so unused for ordering it is dropped; meta_key without a
+	 * value or a meta_value sort tests that the key exists (2.4 PR-122).
+	 */
+	public function test_hivepress_featured_lookup_is_routed(): void {
+		$this->set_post_mode( 'aeav_only' );
+		$router = new WPDO_Post_Query_Router();
+		$query  = $this->make_query(
+			array(
+				'post_type'  => 'product',
+				'meta_key'   => '_stock',
+				'orderby'    => 'rand',
+				'meta_query' => array(
+					array(
+						'relation'      => 'OR',
+						'price__order' => array( 'key' => '_price', 'compare' => 'NOT EXISTS', 'type' => 'DECIMAL' ),
+						array( 'key' => '_price', 'compare' => 'EXISTS', 'type' => 'DECIMAL' ),
+					),
+					array( 'key' => '_price', 'value' => array( 10, 20 ), 'compare' => 'BETWEEN', 'type' => 'NUMERIC' ),
+				),
+			)
+		);
+		$router->pre_get_posts( $query );
+
+		$this->assertSame( '', $query->get( 'meta_key' ), 'meta_key routed' );
+		$this->assertEmpty( array_filter( (array) $query->get( 'meta_query' ), 'is_array' ), 'sort group dropped, filter routed' );
+		$where = $router->posts_where( '', $query );
+		$this->assertStringContainsString( '`_stock` IS NOT NULL', $where );
+		$this->assertStringContainsString( 'BETWEEN', $where );
+	}
+
+	public function test_meta_key_with_a_value_is_left_alone(): void {
+		$this->set_post_mode( 'aeav_only' );
+		$router = new WPDO_Post_Query_Router();
+		$query  = $this->make_query( array( 'post_type' => 'product', 'meta_key' => '_stock', 'meta_value' => '5' ) );
+		$router->pre_get_posts( $query );
+
+		$this->assertSame( '_stock', $query->get( 'meta_key' ) );
+	}
 }

tests/integration/PostStatusSyncTest.php

@@ -25,6 +25,9 @@ class PostStatusSyncTest extends TestCase {
 			'includes/adapters/class-tmdo-adapter-post.php',
 			'includes/engine/class-tmdo-hook-bus.php',
 			'includes/engine/class-tmdo-post-status-sync.php',
+			'includes/engine/class-tmdo-entity-migration-engine.php',
+			'includes/integrations/class-tmdo-post-fields.php',
+			'includes/query/class-tmdo-post-query-router.php',
 		) as $file ) {
 			require_once $base . $file;
 		}
@@ -81,9 +84,34 @@ class PostStatusSyncTest extends TestCase {
 		return $out;
 	}
 
-	private function has_index( string $table ): bool {
+	/** @return array<string, string[]> index name → columns */
+	private function indexes( string $table ): array {
 		global $wpdb;
-		return in_array( 'idx_post_status_date', array_column( (array) $wpdb->get_results( "SHOW INDEX FROM `{$table}`", ARRAY_A ), 'Key_name' ), true );
+		$out = array();
+		foreach ( (array) $wpdb->get_results( "SHOW INDEX FROM `{$table}`", ARRAY_A ) as $row ) {
+			$out[ $row['Key_name'] ][ (int) $row['Seq_in_index'] - 1 ] = $row['Column_name'];
+		}
+		return $out;
+	}
+
+	private function has_index( string $table ): bool {
+		return array( 'post_status', 'post_date', 'post_id' ) === ( $this->indexes( $table )['idx_post_status_date_id'] ?? null );
+	}
+
+	/**
+	 * 2.4 PR-128: the date route's ID tie-break is read from post_id, which the
+	 * index must end with; the 2.2 two-column index is replaced, not kept beside it.
+	 */
+	public function test_run_replaces_the_two_column_index_of_existing_tables(): void {
+		global $wpdb;
+		$wpdb->query( 'ALTER TABLE `' . self::A . '` ADD COLUMN post_status VARCHAR(20) COLLATE utf8mb4_unicode_520_ci DEFAULT NULL, ADD COLUMN post_date DATETIME DEFAULT NULL, ADD INDEX idx_post_status_date (post_status, post_date)' );
+		$GLOBALS['_wp_options'][ TMDO_Post_Status_Sync::OPTION ] = array( 'ps_a' => 'ready' );
+
+		TMDO_Post_Status_Sync::run();
+
+		$this->assertTrue( $this->has_index( self::A ) );
+		$this->assertArrayNotHasKey( 'idx_post_status_date', $this->indexes( self::A ) );
+		$this->assertSame( 'ready', TMDO_Post_Status_Sync::state( 'ps_a' ) );
 	}
 
 	public function test_run_adds_the_columns_copies_every_row_and_marks_groups_ready(): void {
@@ -134,6 +162,23 @@ class PostStatusSyncTest extends TestCase {
 		$this->assertSame( array( 'draft', '2026-02-01 10:00:00' ), $this->copies( self::A )[2], 'other posts untouched' );
 	}
 
+	public function test_a_group_whose_table_was_dropped_is_forgotten(): void {
+		global $wpdb;
+		TMDO_Post_Status_Sync::run();
+		$wpdb->query( 'DROP TABLE `' . self::B . '`' );
+		$ref = new ReflectionProperty( WPDO_Schema_Manager::class, 'table_exists_cache' );
+		$ref->setAccessible( true );
+		$ref->setValue( null, array() );
+		$wpdb->last_error = '';
+
+		TMDO_Post_Status_Sync::on_transition( 'trash', 'publish', (object) array( 'ID' => 1, 'post_status' => 'trash', 'post_date' => '2026-01-05 00:00:00' ) );
+
+		$this->assertSame( '', (string) $wpdb->last_error, 'no UPDATE of a missing table' );
+		$this->assertSame( '', TMDO_Post_Status_Sync::state( 'ps_b' ), 'forgotten' );
+		$this->assertSame( 'ready', TMDO_Post_Status_Sync::state( 'ps_a' ) );
+		$this->assertSame( array( 'trash', '2026-01-05 00:00:00' ), $this->copies( self::A )[1] );
+	}
+
 	public function test_transition_leaves_tables_without_the_columns_alone(): void {
 		global $wpdb;
 		$wpdb->last_error = '';
@@ -156,11 +201,70 @@ class PostStatusSyncTest extends TestCase {
 		$this->assertNotContains( 'post_status', $wpdb->get_col( 'SHOW COLUMNS FROM `' . self::A . '`' ) );
 	}
 
+	/**
+	 * The migration engine (backfill, drift-check --fix) REPLACEs whole rows:
+	 * without the copies, a rebuilt row had NULL post_status, which turns the
+	 * status/date copy route off for the whole group (2.4 PR-127).
+	 */
+	public function test_a_row_rebuilt_from_native_keeps_its_copies(): void {
+		global $wpdb;
+		TMDO_Post_Status_Sync::run();
+		$GLOBALS['_wp_posts'][2] = (object) array( 'ID' => 2, 'post_type' => 'hp_listing', 'post_status' => 'draft', 'post_date' => '2026-02-01 10:00:00' );
+		$GLOBALS['_wp_posts'][3] = (object) array( 'ID' => 3, 'post_type' => 'hp_listing', 'post_status' => 'pending', 'post_date' => '2026-03-01 10:00:00' );
+		$wpdb->query( "CREATE TABLE IF NOT EXISTS `{$wpdb->postmeta}` ( meta_id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT, post_id BIGINT UNSIGNED NOT NULL DEFAULT 0, meta_key VARCHAR(255) DEFAULT NULL, meta_value LONGTEXT, PRIMARY KEY (meta_id) ) ENGINE=InnoDB" );
+		try {
+			$wpdb->query( "INSERT INTO `{$wpdb->postmeta}` (post_id, meta_key, meta_value) VALUES (2, 'k', 'a2-native'), (3, 'k', 'a3-native')" );
+
+			WPDO_Entity_Migration_Engine::migrate_entity( 'post', 'ps_a', 2 ); // Existing row.
+			WPDO_Entity_Migration_Engine::migrate_entity( 'post', 'ps_a', 3 ); // New row.
+		} finally {
+			$wpdb->query( "DROP TABLE IF EXISTS `{$wpdb->postmeta}`" );
+		}
+
+		$this->assertSame( array( 'draft', '2026-02-01 10:00:00' ), $this->copies( self::A )[2] );
+		$this->assertSame( array( 'pending', '2026-03-01 10:00:00' ), $this->copies( self::A )[3] );
+	}
+
+	/**
+	 * Backfills and drift-check --fix rebuild rows outside the Hook Bus: the
+	 * routed counts cached for the old rows must go (2.4 PR-129; dev36: a
+	 * vendor search kept counting 21515 of 21522 matches after a fix).
+	 */
+	public function test_rebuilding_post_rows_invalidates_cached_routed_counts(): void {
+		global $wpdb;
+		$status = $wpdb->prefix . TMDO_TABLE_PREFIX . 'migration_status';
+		$wpdb->query( "CREATE TABLE IF NOT EXISTS `{$wpdb->postmeta}` ( meta_id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT, post_id BIGINT UNSIGNED NOT NULL DEFAULT 0, meta_key VARCHAR(255) DEFAULT NULL, meta_value LONGTEXT, PRIMARY KEY (meta_id) ) ENGINE=InnoDB" );
+		$wpdb->query( "CREATE TABLE IF NOT EXISTS `{$status}` ( id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT, entity_type VARCHAR(50) NOT NULL, group_name VARCHAR(50) NOT NULL, last_id BIGINT UNSIGNED NOT NULL DEFAULT 0, total_migrated BIGINT UNSIGNED NOT NULL DEFAULT 0, status VARCHAR(20) NOT NULL DEFAULT 'pending', started_at DATETIME DEFAULT NULL, completed_at DATETIME DEFAULT NULL, PRIMARY KEY (id), UNIQUE KEY entity_group (entity_type, group_name) ) ENGINE=InnoDB" );
+		$version = static fn() => $GLOBALS['_wp_last_changed'][ TMDO_Post_Query_Router::COUNT_VERSION_GROUP ] ?? null;
+		try {
+			$wpdb->query( "INSERT INTO `{$wpdb->postmeta}` (post_id, meta_key, meta_value) VALUES (2, 'k', 'a2-native')" );
+
+			$GLOBALS['_wp_last_changed'][ TMDO_Post_Query_Router::COUNT_VERSION_GROUP ] = 'before';
+			TMDO_Entity_Migration_Engine::migrate_group( 'post', 'ps_a', array( 'resume' => false, 'sleep_ms' => 0, 'dry_run' => true ) );
+			$this->assertSame( 'before', $version(), 'a dry run writes nothing' );
+
+			foreach ( array(
+				'migrate_entity'      => static fn() => TMDO_Entity_Migration_Engine::migrate_entity( 'post', 'ps_a', 2 ),
+				'migrate_group'       => static fn() => TMDO_Entity_Migration_Engine::migrate_group( 'post', 'ps_a', array( 'resume' => false, 'sleep_ms' => 0 ) ),
+				'migrate_group_batch' => static fn() => TMDO_Entity_Migration_Engine::migrate_group_batch( 'post', 'ps_a' ),
+			) as $path => $run ) {
+				TMDO_Entity_Migration_Engine::reset_checkpoint( 'post', 'ps_a' );
+				$GLOBALS['_wp_last_changed'][ TMDO_Post_Query_Router::COUNT_VERSION_GROUP ] = 'before';
+				$run();
+				$this->assertNotSame( 'before', $version(), $path );
+			}
+		} finally {
+			$wpdb->query( "DROP TABLE IF EXISTS `{$wpdb->postmeta}`" );
+			$wpdb->query( "DROP TABLE IF EXISTS `{$status}`" );
+		}
+	}
+
 	public function test_flat_write_that_creates_a_row_fills_the_copies(): void {
 		TMDO_Post_Status_Sync::run();
 		$mode = new ReflectionProperty( WPDO_Mode_Manager::class, 'cache' );
 		$mode->setAccessible( true );
-		$mode->setValue( null, array( 'post' => 'dual_write', 'user' => 'disabled', 'term' => 'disabled', 'comment' => 'disabled' ) );
+		// aeav_only: the pre-filter itself writes flat (dual_write syncs from native after the write).
+		$mode->setValue( null, array( 'post' => 'aeav_only', 'user' => 'disabled', 'term' => 'disabled', 'comment' => 'disabled' ) );
 		$GLOBALS['_wp_posts'][3]       = (object) array( 'ID' => 3, 'post_type' => 'hp_listing', 'post_status' => 'pending', 'post_date' => '2026-03-01 10:00:00' );
 		$GLOBALS['_wp_current_filter'] = 'update_post_metadata';
 

tests/integration/RestApiIntegrationTest.php

@@ -33,6 +33,7 @@ class RestApiIntegrationTest extends TestCase {
 			'zone'      => 'hot',
 			'column'    => 'rp_price',
 			'type'      => 'decimal',
+			'show_in_rest' => true,
 		] );
 		$registry->register( 'integration_rest', [
 			'post_type' => 'restapi',
@@ -40,11 +41,21 @@ class RestApiIntegrationTest extends TestCase {
 			'zone'      => 'hot',
 			'column'    => 'rp_featured',
 			'type'      => 'tinyint',
+			'show_in_rest' => true,
 		] );
 		$registry->register( 'integration_rest', [
 			'post_type' => 'restapi',
 			'meta_key'  => 'rp_description',
 			'zone'      => 'cold',
+			'show_in_rest' => true,
+		] );
+		// Registered but not public (1.1.1: fields are private by default).
+		$registry->register( 'integration_rest', [
+			'post_type' => 'restapi',
+			'meta_key'  => 'rp_cost',
+			'zone'      => 'hot',
+			'column'    => 'rp_cost',
+			'type'      => 'decimal',
 		] );
 
 		// Create hot table.
@@ -53,6 +64,7 @@ class RestApiIntegrationTest extends TestCase {
 				post_id    BIGINT UNSIGNED NOT NULL,
 				rp_price   DECIMAL(10,2)   DEFAULT NULL,
 				rp_featured TINYINT(1)     DEFAULT NULL,
+				rp_cost    DECIMAL(10,2)   DEFAULT NULL,
 				updated_at DATETIME        NOT NULL DEFAULT CURRENT_TIMESTAMP,
 				PRIMARY KEY (post_id)
 			) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4"
@@ -91,7 +103,8 @@ class RestApiIntegrationTest extends TestCase {
 			$featured = $i % 2;
 			$status   = $statuses[ $i ] ?? 'publish';
 			$wpdb->query( "INSERT INTO `{$wpdb->posts}` (ID, post_type, post_status) VALUES ($i, 'restapi', '$status')" );
-			$wpdb->query( "INSERT INTO `" . self::$hot_table . "` (post_id, rp_price, rp_featured) VALUES ($i, $price, $featured)" );
+			$cost     = 1000 - $price;
+			$wpdb->query( "INSERT INTO `" . self::$hot_table . "` (post_id, rp_price, rp_featured, rp_cost) VALUES ($i, $price, $featured, $cost)" );
 		}
 		$wpdb->query( "INSERT INTO `{$wpdb->posts}` (ID, post_type, post_status) VALUES (9, 'post', 'publish')" );
 		$wpdb->query( "INSERT INTO `" . self::$hot_table . "` (post_id, rp_price, rp_featured) VALUES (9, 900, 1)" );
@@ -194,6 +207,33 @@ class RestApiIntegrationTest extends TestCase {
 		$this->assertTrue( true );
 	}
 
+	public function test_listings_never_return_a_private_column(): void {
+		$req = new WP_REST_Request( 'GET', '/wpdo/v1/listings' );
+		$req->set_param( 'post_type', 'restapi' );
+
+		foreach ( self::$api->get_listings( $req )->get_data() as $item ) {
+			$this->assertArrayNotHasKey( 'rp_cost', $item );
+		}
+	}
+
+	public function test_private_column_cannot_be_used_as_a_filter(): void {
+		$req = new WP_REST_Request( 'GET', '/wpdo/v1/listings' );
+		$req->set_param( 'post_type', 'restapi' );
+		$req->set_param( 'rp_cost_min', 800 );
+
+		$this->assertSame( '5', self::$api->get_listings( $req )->get_headers()['X-WP-Total'], 'filter on a private column is ignored' );
+	}
+
+	public function test_private_column_cannot_be_used_for_ordering(): void {
+		$req = new WP_REST_Request( 'GET', '/wpdo/v1/listings' );
+		$req->set_param( 'post_type', 'restapi' );
+		$req->set_param( 'orderby', 'rp_cost' );
+		$req->set_param( 'order', 'ASC' );
+
+		// rp_cost descends as post_id rises; ignoring it falls back to post_id ASC.
+		$this->assertSame( array( 1, 2, 3, 4, 5 ), array_column( self::$api->get_listings( $req )->get_data(), 'id' ) );
+	}
+
 	public function test_listings_filter_price_min(): void {
 		$req = new WP_REST_Request( 'GET', '/wpdo/v1/listings' );
 		$req->set_param( 'post_type', 'restapi' );

tests/integration/SchemaUpgradeDeferralTest.php

@@ -0,0 +1,177 @@
+<?php
+declare(strict_types=1);
+
+use PHPUnit\Framework\TestCase;
+
+/**
+ * An existing flat table whose definition changed is upgraded from WP-CLI /
+ * WP-Cron only (2.3 PR-107); web requests record the group as deferred.
+ */
+class SchemaUpgradeDeferralTest extends TestCase {
+
+	private const TABLE = 'wp_itest_wpdo_user_sd_core';
+
+	public static function setUpBeforeClass(): void {
+		$base = WPDO_PLUGIN_DIR;
+		foreach ( array(
+			'includes/adapters/interface-entity-adapter.php',
+			'includes/engine/class-tmdo-type-caster.php',
+			'includes/engine/class-tmdo-schema-manager.php',
+			'includes/engine/class-tmdo-entity-registry.php',
+			'includes/engine/class-tmdo-mode-manager.php',
+			'includes/adapters/class-tmdo-adapter-user.php',
+		) as $file ) {
+			require_once $base . $file;
+		}
+		WPDO_Installer::install_v2_tables();
+	}
+
+	protected function setUp(): void {
+		global $wpdb;
+		$wpdb->query( 'DROP TABLE IF EXISTS `' . self::TABLE . '`' );
+		$wpdb->query( 'CREATE TABLE `' . self::TABLE . '` ( id BIGINT NOT NULL AUTO_INCREMENT, user_id BIGINT NOT NULL, sd_a VARCHAR(255) DEFAULT NULL, PRIMARY KEY (id), UNIQUE KEY uk_entity (user_id) ) ENGINE=InnoDB' );
+		$wpdb->delete( $wpdb->prefix . 'wpdo_registry_meta', array( 'entity_type' => 'user', 'group_name' => 'sd_core' ) );
+		$wpdb->insert( $wpdb->prefix . 'wpdo_registry_meta', array( 'entity_type' => 'user', 'group_name' => 'sd_core', 'schema_hash' => 'old', 'field_definitions' => '[]' ) );
+
+		$GLOBALS['_wp_options']                                     = array();
+		$GLOBALS['_wp_scheduled_single']                            = array();
+		$GLOBALS['_wp_filter_callbacks']['tmdo_schema_ddl_allowed'] = array(); // A web request.
+		$ref = new ReflectionProperty( WPDO_Schema_Manager::class, 'table_exists_cache' );
+		$ref->setAccessible( true );
+		$ref->setValue( null, array() );
+		self::set_user_mode( 'dual_write' );
+
+		WPDO_Entity_Registry::init();
+		WPDO_Entity_Registry::register_adapter( 'user', new WPDO_Adapter_User() );
+		WPDO_Entity_Registry::register_group( 'user', 'sd_core', array( array( 'key' => 'sd_a', 'type' => 'text' ), array( 'key' => 'sd_b', 'type' => 'integer' ) ) );
+	}
+
+	protected function tearDown(): void {
+		global $wpdb;
+		$wpdb->query( 'DROP TABLE IF EXISTS `' . self::TABLE . '`' );
+		$wpdb->delete( $wpdb->prefix . 'wpdo_registry_meta', array( 'entity_type' => 'user', 'group_name' => 'sd_core' ) );
+		WPDO_Entity_Registry::init();
+		self::set_user_mode( null );
+		unset( $GLOBALS['_wp_scheduled_single'] );
+	}
+
+	private static function set_user_mode( ?string $mode ): void {
+		$ref = new ReflectionProperty( WPDO_Mode_Manager::class, 'cache' );
+		$ref->setAccessible( true );
+		$ref->setValue( null, null === $mode ? null : array( 'post' => 'disabled', 'user' => $mode, 'term' => 'disabled', 'comment' => 'disabled' ) );
+	}
+
+	private function upgrade(): bool {
+		return TMDO_Schema_Manager::create_or_upgrade_table( 'user', 'sd_core', WPDO_Entity_Registry::get_group_fields( 'user', 'sd_core' ) );
+	}
+
+	public function test_a_web_request_leaves_the_upgrade_to_wp_cron_and_the_group_native(): void {
+		global $wpdb;
+
+		$this->assertFalse( $this->upgrade() );
+
+		$this->assertTrue( TMDO_Schema_Manager::is_deferred( 'user', 'sd_core' ) );
+		$this->assertContains( TMDO_Schema_Manager::INDEXES_HOOK, $GLOBALS['_wp_scheduled_single'] );
+		$this->assertSame( array( 'id', 'user_id', 'sd_a' ), $wpdb->get_col( 'SHOW COLUMNS FROM `' . self::TABLE . '`' ), 'no ALTER' );
+		$this->assertSame( 'old', TMDO_Schema_Manager::get_stored_schema_hash( 'user', 'sd_core' ) );
+	}
+
+	public function test_only_existing_tables_outside_aeav_only_and_outside_cli_or_cron_wait(): void {
+		$this->assertTrue( TMDO_Schema_Manager::upgrade_waits( 'user', self::TABLE ) );
+		$this->assertFalse( TMDO_Schema_Manager::upgrade_waits( 'user', 'wp_itest_wpdo_user_sd_missing' ), 'a new table is created at once' );
+
+		self::set_user_mode( 'aeav_only' );
+		$this->assertFalse( TMDO_Schema_Manager::upgrade_waits( 'user', self::TABLE ), 'aeav_only: the flat table is the only copy' );
+
+		self::set_user_mode( 'dual_write' );
+		add_filter( 'tmdo_schema_ddl_allowed', static fn() => true ); // WP-CLI / WP-Cron.
+		$this->assertFalse( TMDO_Schema_Manager::upgrade_waits( 'user', self::TABLE ) );
+		$GLOBALS['_wp_filter_callbacks']['tmdo_schema_ddl_allowed'] = array();
+	}
+
+	/**
+	 * An existing table is altered by one process at a time: anonymous
+	 * /wp-cron.php requests pass ddl_allowed() too (security review H1).
+	 */
+	public function test_an_upgrade_is_skipped_while_another_process_holds_the_schema_lock(): void {
+		add_filter( 'tmdo_schema_ddl_allowed', static fn() => true );
+		$other = new mysqli(
+			getenv( 'TMDO_TEST_DB_HOST' ) ?: '127.0.0.1',
+			getenv( 'TMDO_TEST_DB_USER' ) ?: 'dbo',
+			(string) getenv( 'TMDO_TEST_DB_PASS' ),
+			getenv( 'TMDO_TEST_DB_NAME' ) ?: 'wp_wpdo_test'
+		);
+		$name = $other->real_escape_string( TMDO_Schema_Manager::index_lock_name() );
+		$other->query( "SELECT GET_LOCK(MD5(CONCAT(DATABASE(), '{$name}')), 0)" );
+		try {
+			$this->assertFalse( $this->upgrade(), 'returns before dbDelta (unavailable here)' );
+		} finally {
+			$other->query( "SELECT RELEASE_LOCK(MD5(CONCAT(DATABASE(), '{$name}')))" );
+			$other->close();
+			$GLOBALS['_wp_filter_callbacks']['tmdo_schema_ddl_allowed'] = array();
+		}
+		$this->assertFalse( TMDO_Schema_Manager::is_deferred( 'user', 'sd_core' ) );
+	}
+
+	/**
+	 * After the upgrade the group stays native until the drift fix has
+	 * rebuilt the rows written meanwhile (security review M1).
+	 */
+	public function test_a_drift_fix_releases_only_upgraded_groups_of_its_entity(): void {
+		global $wpdb;
+		$current = TMDO_Schema_Manager::calculate_schema_hash( WPDO_Entity_Registry::get_group_fields( 'user', 'sd_core' ) );
+		update_option(
+			TMDO_Schema_Manager::DEFERRED_OPTION,
+			array(
+				'user/sd_core'  => 1,
+				'user/sd_later' => 1, // Not upgraded yet (no stored definition).
+				'post/sd_core'  => 1, // Another entity.
+			)
+		);
+
+		TMDO_Schema_Manager::resynced( 'user' );
+		$this->assertTrue( TMDO_Schema_Manager::is_deferred( 'user', 'sd_core' ), 'stored hash still old: not upgraded' );
+
+		$wpdb->update( $wpdb->prefix . 'wpdo_registry_meta', array( 'schema_hash' => $current ), array( 'entity_type' => 'user', 'group_name' => 'sd_core' ) );
+		TMDO_Schema_Manager::resynced( 'user' );
+
+		$this->assertFalse( TMDO_Schema_Manager::is_deferred( 'user', 'sd_core' ) );
+		$this->assertTrue( TMDO_Schema_Manager::is_deferred( 'user', 'sd_later' ) );
+		$this->assertTrue( TMDO_Schema_Manager::is_deferred( 'post', 'sd_core' ) );
+	}
+
+	/**
+	 * The definition went back to the stored one (or another process upgraded
+	 * the table) while the group was deferred (correctness review F2).
+	 */
+	public function test_a_deferred_group_whose_definition_matches_again_is_resynced_then_released(): void {
+		global $wpdb;
+		$current = TMDO_Schema_Manager::calculate_schema_hash( WPDO_Entity_Registry::get_group_fields( 'user', 'sd_core' ) );
+		$wpdb->update( $wpdb->prefix . 'wpdo_registry_meta', array( 'schema_hash' => $current ), array( 'entity_type' => 'user', 'group_name' => 'sd_core' ) );
+		update_option( TMDO_Schema_Manager::DEFERRED_OPTION, array( 'user/sd_core' => 1 ) );
+
+		$this->assertTrue( $this->upgrade() );
+
+		$this->assertTrue( TMDO_Schema_Manager::is_deferred( 'user', 'sd_core' ), 'dual_write: native until the drift fix' );
+		$this->assertContains( TMDO_Drift_Check::RESYNC_HOOK, $GLOBALS['_wp_scheduled_single'] );
+
+		self::set_user_mode( 'disabled' );
+		$this->upgrade();
+		$this->assertFalse( TMDO_Schema_Manager::is_deferred( 'user', 'sd_core' ), 'no flat writes: nothing to rebuild' );
+	}
+
+	/**
+	 * The cron event upgrades deferred groups itself: with ALTERNATE_WP_CRON
+	 * it runs inside a visitor's request, after init (correctness review F3).
+	 */
+	public function test_the_cron_event_handles_deferred_groups(): void {
+		global $wpdb;
+		$current = TMDO_Schema_Manager::calculate_schema_hash( WPDO_Entity_Registry::get_group_fields( 'user', 'sd_core' ) );
+		$wpdb->update( $wpdb->prefix . 'wpdo_registry_meta', array( 'schema_hash' => $current ), array( 'entity_type' => 'user', 'group_name' => 'sd_core' ) );
+		update_option( TMDO_Schema_Manager::DEFERRED_OPTION, array( 'user/sd_core' => 1 ) );
+
+		TMDO_Schema_Manager::ensure_pending_indexes();
+
+		$this->assertContains( TMDO_Drift_Check::RESYNC_HOOK, $GLOBALS['_wp_scheduled_single'] );
+	}
+}

tests/integration/ShadowDiffThrottleTest.php

@@ -0,0 +1,89 @@
+<?php
+declare(strict_types=1);
+
+use PHPUnit\Framework\TestCase;
+
+/**
+ * TMDO_Shadow_Diff_Logger throttling (2.2 PR-075).
+ *
+ * The per-object window (one row per entity + key per 5 minutes) did not stop
+ * a key that is stale on every object — WooCommerce's total_sales, written by
+ * direct SQL — from logging a row for each product read. A key now records at
+ * most KEY_LIMIT rows per KEY_WINDOW across all objects.
+ */
+class ShadowDiffThrottleTest extends TestCase {
+
+	private const DIFFS  = 'wp_itest_wpdo_shadow_diffs';
+	private const ERRORS = 'wp_itest_wpdo_errors';
+
+	public static function setUpBeforeClass(): void {
+		foreach ( array(
+			'includes/adapters/interface-entity-adapter.php',
+			'includes/adapters/class-tmdo-adapter-user.php',
+			'includes/engine/class-tmdo-shadow-diff-logger.php',
+		) as $file ) {
+			require_once WPDO_PLUGIN_DIR . $file;
+		}
+	}
+
+	protected function setUp(): void {
+		global $wpdb;
+		self::drop();
+		$wpdb->query( "CREATE TABLE `{$wpdb->usermeta}` ( umeta_id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT, user_id BIGINT UNSIGNED NOT NULL DEFAULT 0, meta_key VARCHAR(255) DEFAULT NULL, meta_value LONGTEXT, PRIMARY KEY (umeta_id), KEY user_id (user_id) ) ENGINE=InnoDB" );
+		$wpdb->query( 'CREATE TABLE `' . self::DIFFS . "` ( id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT, ts DATETIME NOT NULL DEFAULT '0000-00-00 00:00:00', entity_type VARCHAR(20) NOT NULL DEFAULT '', entity_id BIGINT UNSIGNED NOT NULL DEFAULT 0, meta_key VARCHAR(255) NOT NULL DEFAULT '', postmeta_value LONGTEXT, zone_value LONGTEXT, diff_hash VARCHAR(40) NOT NULL DEFAULT '', PRIMARY KEY (id) ) ENGINE=InnoDB" );
+		$wpdb->query( 'CREATE TABLE `' . self::ERRORS . "` ( id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT, module VARCHAR(100) NOT NULL DEFAULT '', zone VARCHAR(20) NOT NULL DEFAULT '', hook VARCHAR(255) NOT NULL DEFAULT '', message TEXT NOT NULL, context LONGTEXT, created_at DATETIME NOT NULL DEFAULT '0000-00-00 00:00:00', PRIMARY KEY (id) ) ENGINE=InnoDB" );
+		for ( $id = 1; $id <= 30; $id++ ) {
+			$wpdb->insert( $wpdb->usermeta, array( 'user_id' => $id, 'meta_key' => 'total_sales', 'meta_value' => '5' ) );
+			$wpdb->insert( $wpdb->usermeta, array( 'user_id' => $id, 'meta_key' => 'other_key', 'meta_value' => '5' ) );
+		}
+
+		$GLOBALS['_wp_transients'] = array();
+		WPDO_Entity_Registry::init();
+		WPDO_Entity_Registry::register_adapter( 'user', new WPDO_Adapter_User() );
+	}
+
+	protected function tearDown(): void {
+		self::drop();
+		WPDO_Entity_Registry::init();
+	}
+
+	private static function drop(): void {
+		global $wpdb;
+		foreach ( array( $wpdb->usermeta, self::DIFFS, self::ERRORS ) as $table ) {
+			$wpdb->query( "DROP TABLE IF EXISTS `{$table}`" );
+		}
+	}
+
+	private function logged( string $key ): int {
+		global $wpdb;
+		return (int) $wpdb->get_var( $wpdb->prepare( 'SELECT COUNT(*) FROM `' . self::DIFFS . '` WHERE meta_key = %s', $key ) );
+	}
+
+	private function stale_read( int $user_id, string $key ): void {
+		TMDO_Shadow_Diff_Logger::compare_and_log( 'user', $user_id, $key, 4, array( 'type' => 'integer' ) );
+	}
+
+	public function test_a_key_stale_on_every_object_logs_at_most_the_key_limit(): void {
+		for ( $id = 1; $id <= 30; $id++ ) {
+			$this->stale_read( $id, 'total_sales' );
+		}
+
+		$this->assertSame( TMDO_Shadow_Diff_Logger::KEY_LIMIT, $this->logged( 'total_sales' ) );
+	}
+
+	public function test_the_limit_is_per_key(): void {
+		for ( $id = 1; $id <= 30; $id++ ) {
+			$this->stale_read( $id, 'total_sales' );
+		}
+		$this->stale_read( 1, 'other_key' );
+
+		$this->assertSame( 1, $this->logged( 'other_key' ) );
+	}
+
+	public function test_the_same_object_and_key_still_log_once_per_window(): void {
+		$this->stale_read( 1, 'total_sales' );
+		$this->stale_read( 1, 'total_sales' );
+
+		$this->assertSame( 1, $this->logged( 'total_sales' ) );
+	}
+}

tests/integration/bootstrap.php

@@ -168,7 +168,12 @@ $wpdb = new class( $_mysqli ) {
 			fn( $v ) => $v === null ? 'NULL' : "'" . $this->db->real_escape_string( (string) $v ) . "'",
 			array_values( $data )
 		) );
-		$ok = $this->db->query( "INSERT INTO `{$table}` ({$cols}) VALUES ({$vals})" );
+		try {
+			$ok = $this->db->query( "INSERT INTO `{$table}` ({$cols}) VALUES ({$vals})" );
+		} catch ( mysqli_sql_exception $e ) { // Like wpdb::insert(): an SQL error returns false.
+			$this->last_error = $e->getMessage();
+			return false;
+		}
 		if ( $ok ) { $this->insert_id = (int) $this->db->insert_id; return $this->insert_id; }
 		$this->last_error = (string) $this->db->error;
 		return false;
@@ -200,7 +205,12 @@ $wpdb = new class( $_mysqli ) {
 	public function flush(): void {}
 
 	public function query( string $sql ): int|bool {
-		$result = $this->db->query( $sql );
+		try {
+			$result = $this->db->query( $sql );
+		} catch ( mysqli_sql_exception $e ) { // Like wpdb::query(): an SQL error returns false.
+			$this->last_error = $e->getMessage();
+			return false;
+		}
 		if ( $result instanceof mysqli_result ) { $result->free(); return true; }
 		if ( false === $result ) { return false; }
 		return $this->db->affected_rows;
@@ -289,9 +299,22 @@ if ( ! function_exists( 'do_action_ref_array' ) ) {
 if ( ! function_exists( 'is_admin' ) )       { function is_admin(): bool { return ! empty( $GLOBALS['_wp_is_admin'] ); } }
 if ( ! function_exists( 'is_singular' ) )    { function is_singular( $t = '' ): bool { return false; } }
 if ( ! function_exists( 'wp_doing_ajax' ) )  { function wp_doing_ajax(): bool { return false; } }
+if ( ! function_exists( 'get_metadata' ) ) {
+	// Like get_metadata(): the first stored value of a key (single), read from the real meta table.
+	function get_metadata( string $type, $object_id, string $key = '', bool $single = false ) {
+		global $wpdb;
+		$table = $wpdb->{$type . 'meta'};
+		$id    = 'user' === $type ? 'umeta_id' : 'meta_id';
+		$value = $wpdb->get_var( $wpdb->prepare( "SELECT meta_value FROM `{$table}` WHERE `{$type}_id` = %d AND meta_key = %s ORDER BY `{$id}` LIMIT 1", $object_id, $key ) );
+		if ( $single ) {
+			return null === $value ? '' : maybe_unserialize( $value );
+		}
+		return null === $value ? array() : array( maybe_unserialize( $value ) );
+	}
+}
 if ( ! function_exists( 'wp_next_scheduled' ) ) { function wp_next_scheduled( string $hook ): int|false { return false; } }
 if ( ! function_exists( 'wp_schedule_event' ) ) { function wp_schedule_event( int $t, string $r, string $h ): bool { return true; } }
-if ( ! function_exists( 'wp_schedule_single_event' ) ) { function wp_schedule_single_event( int $ts, string $hook ): bool { return true; } }
+if ( ! function_exists( 'wp_schedule_single_event' ) ) { function wp_schedule_single_event( int $ts, string $hook ): bool { $GLOBALS['_wp_scheduled_single'][] = $hook; return true; } }
 if ( ! function_exists( 'wp_clear_scheduled_hook' ) ) { function wp_clear_scheduled_hook( string $hook ): int|false { return 0; } }
 if ( ! function_exists( 'sanitize_text_field' ) ) { function sanitize_text_field( string $s ): string { return trim( strip_tags( $s ) ); } }
 if ( ! function_exists( '__' ) ) { function __( string $text, string $domain = 'default' ): string { return $text; } }
@@ -411,6 +434,7 @@ if ( ! function_exists( 'wp_mkdir_p' ) ) {
 
 $GLOBALS['_wp_cache'] = [];
 if ( ! function_exists( 'wp_cache_get_last_changed' ) ) { function wp_cache_get_last_changed( $group ) { return $GLOBALS['_wp_last_changed'][ $group ] ??= '0'; } }
+if ( ! function_exists( 'wp_cache_set_last_changed' ) ) { function wp_cache_set_last_changed( $group ) { $GLOBALS['_wp_last_changed'][ $group ] = (string) hrtime( true ); return $GLOBALS['_wp_last_changed'][ $group ]; } }
 if ( ! function_exists( 'wp_cache_set_posts_last_changed' ) ) { function wp_cache_set_posts_last_changed() { $GLOBALS['_wp_last_changed']['posts'] = (string) hrtime( true ); } }
 if ( ! function_exists( 'wp_cache_get' ) ) { function wp_cache_get( $key, $group = '' ) { return $GLOBALS['_wp_cache'][ $group ][ $key ] ?? false; } }
 if ( ! function_exists( 'wp_cache_set' ) ) { function wp_cache_set( $key, $value, $group = '', $ttl = 0 ): bool { $GLOBALS['_wp_cache'][ $group ][ $key ] = $value; return true; } }
@@ -418,6 +442,7 @@ if ( ! function_exists( 'wp_cache_delete' ) ) { function wp_cache_delete( $key,
 
 if ( ! class_exists( 'WP_Query' ) ) {
 	class WP_Query {
+		public string $request = '';
 		private array $vars = [];
 		public function get( string $key, $default = '' ) { return $this->vars[ $key ] ?? $default; }
 		public function set( string $key, $value ): void { $this->vars[ $key ] = $value; }
@@ -516,10 +541,12 @@ if ( ! function_exists( 'wp_insert_comment' ) ) {
 
 if ( ! class_exists( 'WP_CLI' ) ) {
 	class WP_CLI {
-		public static function log( string $msg ): void {}
-		public static function warning( string $msg ): void {}
-		public static function success( string $msg ): void {}
-		public static function error( string $msg ): void {}
+		// Output is kept in $GLOBALS['_wp_cli_output'] so CLI tests can assert it.
+		public static function log( string $msg ): void { $GLOBALS['_wp_cli_output'][] = $msg; }
+		public static function line( string $msg = '' ): void { $GLOBALS['_wp_cli_output'][] = $msg; }
+		public static function warning( string $msg ): void { $GLOBALS['_wp_cli_output'][] = 'Warning: ' . $msg; }
+		public static function success( string $msg ): void { $GLOBALS['_wp_cli_output'][] = 'Success: ' . $msg; }
+		public static function error( string $msg ): void { $GLOBALS['_wp_cli_output'][] = 'Error: ' . $msg; }
 		public static function add_command( string $name, $class ): void {}
 	}
 }
@@ -576,6 +603,7 @@ require_once TMDO_PATH . 'includes/safety/class-tmdo-fsm-guard.php';
 require_once TMDO_PATH . 'includes/class-tmdo-rest-api.php';
 require_once TMDO_PATH . 'includes/engine/class-tmdo-type-caster.php';
 require_once TMDO_PATH . 'includes/engine/class-tmdo-mode-manager.php';
+require_once TMDO_PATH . 'includes/engine/class-tmdo-promotion-guard.php';
 require_once TMDO_PATH . 'includes/engine/class-tmdo-audit-logger.php';
 require_once TMDO_PATH . 'includes/engine/class-tmdo-shadow-diff-logger.php';
 require_once TMDO_PATH . 'includes/engine/class-tmdo-conflict-detector.php';
@@ -584,6 +612,7 @@ require_once TMDO_PATH . 'includes/engine/class-tmdo-query-compiler.php';
 require_once TMDO_PATH . 'includes/engine/class-tmdo-schema-manager.php';
 require_once TMDO_PATH . 'includes/engine/class-tmdo-entity-registry.php';
 require_once TMDO_PATH . 'includes/engine/class-tmdo-entity-migration-engine.php';
+require_once TMDO_PATH . 'includes/diagnostic/class-tmdo-drift-check.php';
 require_once TMDO_PATH . 'includes/engine/class-tmdo-entity-health.php';
 require_once TMDO_PATH . 'includes/engine/class-tmdo-auto-promoter.php';
 require_once TMDO_PATH . 'includes/engine/class-tmdo-hook-bus.php';
@@ -610,6 +639,7 @@ require_once TMDO_PATH . 'includes/migration/class-tmdo-migration-orchestrator.p
 require_once TMDO_PATH . 'includes/migration/class-tmdo-post-migration.php';
 require_once TMDO_PATH . 'includes/migration/class-tmdo-post-group-reconciler.php';
 require_once TMDO_PATH . 'includes/migration/class-tmdo-native-restorer.php';
+require_once TMDO_PATH . 'includes/migration/class-tmdo-array-literal-repair.php';
 require_once TMDO_PATH . 'modules/options/class-tmdo-options-manager.php';
 require_once TMDO_PATH . 'includes/class-tmdo-postmeta-cleaner.php';
 require_once TMDO_PATH . 'includes/class-tmdo-termmeta-cleaner.php';
@@ -643,3 +673,43 @@ if ( ! class_exists( 'TMDO_Listing_Stats' ) ) {
 	}
 	class_alias( 'TMDO_Listing_Stats', 'WPDO_Listing_Stats' );
 }
+
+/**
+ * The WooCommerce product group core registered before 1.2.0 (PR-077 moved
+ * product meta back to native only). Tests that use products as a routed
+ * post type register it themselves; the table name wp_itest_wpdo_post_wc_product
+ * is unchanged.
+ */
+function tmdo_test_register_wc_product_group(): void {
+	$enum = static fn( string $key, array $options ): array => array(
+		'key'     => $key,
+		'type'    => 'enum',
+		'options' => $options,
+	);
+	TMDO_Entity_Registry::register_group(
+		'post',
+		'wc_product',
+		array(
+			array( 'key' => '_price', 'type' => 'decimal', 'searchable' => true ),
+			array( 'key' => '_regular_price', 'type' => 'decimal', 'searchable' => true ),
+			array( 'key' => '_sale_price', 'type' => 'decimal', 'searchable' => true ),
+			array( 'key' => '_stock', 'type' => 'integer', 'searchable' => true ),
+			array( 'key' => '_stock_status', 'type' => 'enum', 'searchable' => true, 'options' => array( 'instock', 'outofstock', 'onbackorder' ) ),
+			array( 'key' => '_sku', 'type' => 'text', 'searchable' => true ),
+			$enum( '_manage_stock', array( 'yes', 'no' ) ),
+			$enum( '_backorders', array( 'yes', 'no', 'notify' ) ),
+			$enum( '_sold_individually', array( 'yes', 'no' ) ),
+			$enum( '_virtual', array( 'yes', 'no' ) ),
+			$enum( '_downloadable', array( 'yes', 'no' ) ),
+			array( 'key' => '_tax_class', 'type' => 'text' ),
+			$enum( '_tax_status', array( 'taxable', 'shipping', 'none' ) ),
+			array( 'key' => '_download_limit', 'type' => 'integer' ),
+			array( 'key' => '_download_expiry', 'type' => 'integer' ),
+			array( 'key' => '_product_version', 'type' => 'text' ),
+			array( 'key' => '_wc_average_rating', 'type' => 'decimal', 'searchable' => true ),
+			array( 'key' => '_wc_review_count', 'type' => 'integer' ),
+			array( 'key' => 'total_sales', 'type' => 'integer', 'searchable' => true ),
+		),
+		array( 'post_types' => array( 'product' ) )
+	);
+}

tests/live/README.md

@@ -0,0 +1,61 @@
+# Live test suite
+
+Tests that must run inside a real WordPress site, because the stubbed
+`tests/integration` bootstrap cannot reproduce:
+
+- WP core meta flows (`update_metadata()` reads the old value through
+  `get_metadata_raw()` before writing — the shadow_read write-loss bug lives there)
+- the SQL that `WP_Query` actually builds, and hook priorities
+- HivePress / WooCommerce behaviour (`pre_get_posts` sort clauses, empty-key
+  meta reads, direct-SQL stock updates)
+
+**Never run against a production site.** Suites create and delete fixtures
+(`tmdo_live_*` users, `tmdo-live-*` terms). Entity modes are overridden in
+process through `pre_option_wpdo_bridge_modes`; nothing is written to
+`wpdo_bridge_modes` or `wpdo_hook_bus_enabled`.
+
+The reference site is dev36 (HivePress + Marketplace + WooCommerce), with this
+plugin symlinked from the `plugins-dev` worktree while developing.
+
+## Run
+
+```bash
+wp --path=/var/www/Studio/wp-local-dev36 eval-file tests/live/run.php <suite> [<suite> ...]
+```
+
+Exit code 0 when every test passed, 1 otherwise. Output per test:
+
+| Status | Meaning |
+|---|---|
+| PASS / FAIL | normal |
+| XFAIL | known bug, test marked `xfail` with the PR that fixes it; not counted as a failure |
+| XPASS | an `xfail` test passed — counted as a failure so the fixing PR removes the marker |
+| SKIP | the site does not register the key / taxonomy the test needs |
+
+## Suites
+
+| Suite | Covers |
+|---|---|
+| `shadow_write` | writes in shadow_read reach native meta (user, term, HivePress listing) |
+| `serialized` | array meta values are stored serialized in flat tables, never "Array" |
+| `resync` | dual_write / shadow_read: flat follows native after every write (4 entities × 2 modes: update, same value, delete, refused writes, stale flat, key rename by meta_id) |
+| `router` | a routed WP_Query returns the same ids, in order, as native (OR, several post types, untyped numeric compares, named orderby, LIKE, keys of two groups, NOT EXISTS with the status/date copy route, meta orderby: HivePress sort shape, named clause, meta_key + meta_value_num); routed SQL has no GROUP BY |
+| `rest` | anonymous GET of the public listings endpoints returns no protected or credential-like field (1.1.1) |
+| `drift` | `TMDO_Drift_Check`: json groups show no false diff; a planted flat mismatch / flat-only value counts exactly once (1.2.0) |
+| `zero_side_effect` | zone tables that were never created are never queried on save / delete |
+
+## Tools (`tools/`)
+
+Benchmark and data-flow helpers used for the 2026-09-26 dev36 integration test.
+Output files go to the current directory (`qbench`) or `$TMDO_LIVE_OUT`
+(default `/tmp`, `run_batch.sh`), never into the repo.
+
+| Tool | Use |
+|---|---|
+| `seed.php` | `wp eval-file seed.php <vendors\|listings\|requests\|reviews\|products\|orders\|terms> <n> [tag]` — seed through real HivePress / WC APIs |
+| `run_batch.sh` | `run_batch.sh <tag> [divisor]` — parallel seeding batch (`TMDO_LIVE_WP_PATH`, `TMDO_LIVE_OUT`) |
+| `clone.sql` | bench only: clone hp_listing rows to reach large scale (`sed "s/__K__/<n>/" clone.sql \| wp db query`) |
+| `checker.php` | `wp eval-file checker.php [entity]` — native vs flat consistency per registered key (SQL only) |
+| `qbench.php` / `qdiff.php` | run 16 WP_Query shapes, then diff two runs (native vs routed): result sets, order, latency, SQL errors |
+| `mut.php` | data-flow mutations through HivePress models, WC CRUD and core APIs; prints native / flat / API values |
+| `fe.sh` + `zz-s36-probe.php` | front-end search probe (`TMDO_LIVE_URL`). Copy the probe into `wp-content/mu-plugins/` only for the run and remove it afterwards; it only answers requests carrying `X-S36-Probe: 1` |

tests/live/lib/assert.php

@@ -0,0 +1,130 @@
+<?php
+/**
+ * Minimal assertion + test registry for the live suite.
+ *
+ * Why not PHPUnit: the live suite runs inside a real WordPress request
+ * (`wp eval-file`) so WP core's update_metadata() flow, WP_Query SQL and
+ * third-party hooks (HivePress, WooCommerce) are exercised for real — the
+ * stubbed integration bootstrap cannot reproduce those.
+ *
+ * @package WP_Data_Optimizer
+ */
+
+declare(strict_types=1);
+
+/**
+ * Thrown by the assert helpers.
+ */
+class TMDO_Live_Failure extends RuntimeException {}
+
+/**
+ * Thrown to skip a test whose preconditions the site does not meet.
+ */
+class TMDO_Live_Skip extends RuntimeException {}
+
+/**
+ * Test registry and runner.
+ */
+final class TMDO_Live {
+
+	/**
+	 * Registered tests.
+	 *
+	 * @var array<int, array{suite:string, name:string, fn:callable, xfail:string}>
+	 */
+	private static array $tests = array();
+
+	/**
+	 * Suite currently being loaded.
+	 *
+	 * @var string
+	 */
+	public static string $suite = '';
+
+	/**
+	 * Register a test.
+	 *
+	 * `xfail` marks a known bug: a failure is reported as XFAIL (not counted),
+	 * a pass is reported as XPASS and counted as a failure so the marker gets
+	 * removed by the PR that fixes the bug.
+	 *
+	 * @param string   $name Test name.
+	 * @param callable $fn   Test body.
+	 * @param array    $opts Options: xfail => reason.
+	 */
+	public static function test( string $name, callable $fn, array $opts = array() ): void {
+		self::$tests[] = array(
+			'suite' => self::$suite,
+			'name'  => $name,
+			'fn'    => $fn,
+			'xfail' => (string) ( $opts['xfail'] ?? '' ),
+		);
+	}
+
+	/**
+	 * Run every registered test; return true when nothing failed.
+	 */
+	public static function run(): bool {
+		$counts = array( 'PASS' => 0, 'FAIL' => 0, 'XFAIL' => 0, 'XPASS' => 0, 'SKIP' => 0 );
+
+		foreach ( self::$tests as $t ) {
+			$detail = '';
+			try {
+				( $t['fn'] )();
+				$status = '' !== $t['xfail'] ? 'XPASS' : 'PASS';
+			} catch ( TMDO_Live_Skip $e ) {
+				$status = 'SKIP';
+				$detail = $e->getMessage();
+			} catch ( Throwable $e ) {
+				$status = '' !== $t['xfail'] ? 'XFAIL' : 'FAIL';
+				$detail = ( $e instanceof TMDO_Live_Failure ? '' : get_class( $e ) . ': ' ) . $e->getMessage();
+			} finally {
+				TMDO_Live_Fixtures::teardown();
+			}
+
+			++$counts[ $status ];
+			if ( '' !== $t['xfail'] ) {
+				$detail = trim( $detail . ' [xfail: ' . $t['xfail'] . ']' );
+			}
+			printf( "%-5s %s :: %s%s\n", $status, $t['suite'], $t['name'], '' !== $detail ? "\n      " . $detail : '' );
+		}
+
+		printf(
+			"\n%d passed, %d failed, %d xfail, %d xpass, %d skipped\n",
+			$counts['PASS'],
+			$counts['FAIL'],
+			$counts['XFAIL'],
+			$counts['XPASS'],
+			$counts['SKIP']
+		);
+
+		return 0 === $counts['FAIL'] && 0 === $counts['XPASS'];
+	}
+}
+
+/**
+ * Fail unless $actual is identical to $expected.
+ *
+ * @param mixed  $expected Expected value.
+ * @param mixed  $actual   Actual value.
+ * @param string $message  Context.
+ */
+function tmdo_live_assert_same( $expected, $actual, string $message ): void {
+	if ( $expected !== $actual ) {
+		throw new TMDO_Live_Failure(
+			sprintf( '%s — expected %s, got %s', $message, var_export( $expected, true ), var_export( $actual, true ) ) // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_var_export
+		);
+	}
+}
+
+/**
+ * Fail unless $condition is true.
+ *
+ * @param bool   $condition Condition.
+ * @param string $message   Context.
+ */
+function tmdo_live_assert_true( bool $condition, string $message ): void {
+	if ( ! $condition ) {
+		throw new TMDO_Live_Failure( $message );
+	}
+}

tests/live/lib/fixtures.php

@@ -0,0 +1,243 @@
+<?php
+/**
+ * Live-suite fixtures: in-process mode overrides, throwaway entities, and
+ * direct reads of native meta / flat tables (bypassing every meta filter).
+ *
+ * Nothing here persists a mode change: modes are overridden through the
+ * `pre_option_wpdo_bridge_modes` filter for the current process only.
+ *
+ * @package WP_Data_Optimizer
+ */
+
+declare(strict_types=1);
+
+/**
+ * Fixture helpers, reset after every test by TMDO_Live::run().
+ */
+final class TMDO_Live_Fixtures {
+
+	/**
+	 * Entities created by the current test, deleted on teardown.
+	 *
+	 * @var array<int, array{0:string, 1:int, 2?:string}>
+	 */
+	private static array $created = array();
+
+	/**
+	 * Active pre_option callback, if any.
+	 *
+	 * @var callable|null
+	 */
+	private static $mode_filter = null;
+
+	/**
+	 * Override entity modes for this process and make sure the Hook Bus is hooked.
+	 *
+	 * @param array<string, string> $modes e.g. array( 'user' => 'shadow_read' ).
+	 */
+	public static function use_modes( array $modes ): void {
+		self::clear_mode_filter();
+
+		$stored            = get_option( 'wpdo_bridge_modes', array() );
+		$merged            = array_merge( is_array( $stored ) ? $stored : array(), $modes );
+		self::$mode_filter = static function () use ( $merged ) {
+			return $merged;
+		};
+		add_filter( 'pre_option_wpdo_bridge_modes', self::$mode_filter );
+		self::reset_caches();
+
+		// The Hook Bus only boots when wpdo_hook_bus_enabled is on; the suite
+		// must not depend on (or change) that site option.
+		if ( false === has_filter( 'update_user_metadata', array( 'TMDO_Hook_Bus', 'intercept_update' ) ) ) {
+			TMDO_Hook_Bus::init();
+		}
+	}
+
+	/**
+	 * Create a throwaway user.
+	 */
+	public static function user(): int {
+		$login = 'tmdo_live_' . wp_generate_password( 6, false, false );
+		$id    = wp_insert_user(
+			array(
+				'user_login' => $login,
+				'user_email' => $login . '@example.test',
+				'user_pass'  => wp_generate_password(),
+			)
+		);
+		if ( is_wp_error( $id ) ) {
+			throw new TMDO_Live_Failure( 'fixture user: ' . $id->get_error_message() );
+		}
+		self::$created[] = array( 'user', (int) $id );
+		return (int) $id;
+	}
+
+	/**
+	 * Create a throwaway term.
+	 *
+	 * @param string $taxonomy Taxonomy.
+	 */
+	public static function term( string $taxonomy ): int {
+		if ( ! taxonomy_exists( $taxonomy ) ) {
+			throw new TMDO_Live_Skip( "taxonomy {$taxonomy} not registered on this site" );
+		}
+		$t = wp_insert_term( 'tmdo-live-' . wp_generate_password( 6, false, false ), $taxonomy );
+		if ( is_wp_error( $t ) ) {
+			throw new TMDO_Live_Failure( 'fixture term: ' . $t->get_error_message() );
+		}
+		self::$created[] = array( 'term', (int) $t['term_id'], $taxonomy );
+		return (int) $t['term_id'];
+	}
+
+	/**
+	 * Create a throwaway post.
+	 *
+	 * @param string $post_type Post type.
+	 */
+	public static function post( string $post_type ): int {
+		if ( ! post_type_exists( $post_type ) ) {
+			throw new TMDO_Live_Skip( "post type {$post_type} not registered on this site" );
+		}
+		$id = wp_insert_post(
+			array(
+				'post_type'   => $post_type,
+				'post_title'  => 'tmdo-live-' . wp_generate_password( 6, false, false ),
+				'post_status' => 'draft',
+			),
+			true
+		);
+		if ( is_wp_error( $id ) ) {
+			throw new TMDO_Live_Failure( 'fixture post: ' . $id->get_error_message() );
+		}
+		self::$created[] = array( 'post', (int) $id );
+		return (int) $id;
+	}
+
+	/**
+	 * Create a throwaway comment (on a throwaway post of $post_type).
+	 *
+	 * @param string $post_type    Post type of the parent post.
+	 * @param string $comment_type Comment type.
+	 */
+	public static function comment( string $post_type, string $comment_type = 'comment' ): int {
+		$post_id = self::post( $post_type );
+		$id      = wp_insert_comment(
+			array(
+				'comment_post_ID'  => $post_id,
+				'comment_content'  => 'tmdo-live',
+				'comment_type'     => $comment_type,
+				'comment_approved' => 1,
+			)
+		);
+		if ( ! $id ) {
+			throw new TMDO_Live_Failure( 'fixture comment could not be created' );
+		}
+		self::$created[] = array( 'comment', (int) $id );
+		return (int) $id;
+	}
+
+	/**
+	 * Native meta values for a key, read with SQL (no filters, no cache).
+	 *
+	 * @param string $type Entity type (post|user|term|comment).
+	 * @param int    $id   Entity ID.
+	 * @param string $key  Meta key.
+	 * @return string[]
+	 */
+	public static function native( string $type, int $id, string $key ): array {
+		global $wpdb;
+		$table  = _get_meta_table( $type );
+		$id_col = $type . '_id';
+		$pk     = 'user' === $type ? 'umeta_id' : 'meta_id';
+		// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared -- table/column names are WP internals.
+		return $wpdb->get_col( $wpdb->prepare( "SELECT meta_value FROM {$table} WHERE {$id_col} = %d AND meta_key = %s ORDER BY {$pk}", $id, $key ) );
+	}
+
+	/**
+	 * Raw flat-table value for a key; 'NO-ROW' when the entity has no row.
+	 *
+	 * @param string $type      Entity type.
+	 * @param int    $id        Entity ID.
+	 * @param string $key       Meta key.
+	 * @param string $post_type For posts: the post type whose group owns the key.
+	 * @return string|null
+	 */
+	public static function flat( string $type, int $id, string $key, string $post_type = '' ) {
+		global $wpdb;
+		$field = self::field( $type, $key, $post_type );
+		$table = TMDO_Schema_Manager::get_table_name( $type, $field['group'] );
+		$col   = TMDO_Schema_Manager::sanitize_column_name( $key );
+		// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared -- table/column come from the registry.
+		$row = $wpdb->get_row( $wpdb->prepare( "SELECT `{$col}` AS v FROM `{$table}` WHERE {$type}_id = %d", $id ), ARRAY_A );
+		return null === $row ? 'NO-ROW' : $row['v'];
+	}
+
+	/**
+	 * Registry field for a key, or skip the test when the site does not register it.
+	 *
+	 * A key can live in several post groups (hp_rating in listing and vendor
+	 * groups); pass the post type to pick the group scoped to it.
+	 *
+	 * @param string $type      Entity type.
+	 * @param string $key       Meta key.
+	 * @param string $post_type For posts: the post type whose group owns the key.
+	 */
+	public static function field( string $type, string $key, string $post_type = '' ): array {
+		$field = TMDO_Entity_Registry::get_field( $type, $key );
+		if ( '' !== $post_type ) {
+			foreach ( TMDO_Entity_Registry::get_groups_for_type( $type ) as $group ) {
+				if ( in_array( $post_type, TMDO_Entity_Registry::get_group_post_types( $type, $group ), true )
+					&& in_array( $key, TMDO_Entity_Registry::get_group_keys( $type, $group ), true ) ) {
+					$field = array( 'group' => $group ) + (array) $field;
+					break;
+				}
+			}
+		}
+		if ( ! $field ) {
+			throw new TMDO_Live_Skip( "{$type} key {$key} is not registered on this site" );
+		}
+		if ( ! TMDO_Schema_Manager::table_exists( TMDO_Schema_Manager::get_table_name( $type, $field['group'] ) ) ) {
+			throw new TMDO_Live_Skip( "flat table for {$type}/{$field['group']} does not exist" );
+		}
+		return $field;
+	}
+
+	/**
+	 * Delete fixtures and drop the mode override.
+	 */
+	public static function teardown(): void {
+		require_once ABSPATH . 'wp-admin/includes/user.php';
+		foreach ( array_reverse( self::$created ) as $c ) {
+			if ( 'user' === $c[0] ) {
+				wp_delete_user( $c[1] );
+			} elseif ( 'term' === $c[0] ) {
+				wp_delete_term( $c[1], $c[2] );
+			} elseif ( 'post' === $c[0] ) {
+				wp_delete_post( $c[1], true );
+			} elseif ( 'comment' === $c[0] ) {
+				wp_delete_comment( $c[1], true );
+			}
+		}
+		self::$created = array();
+		self::clear_mode_filter();
+		self::reset_caches();
+	}
+
+	/**
+	 * Remove the pre_option override, if any.
+	 */
+	private static function clear_mode_filter(): void {
+		if ( null !== self::$mode_filter ) {
+			remove_filter( 'pre_option_wpdo_bridge_modes', self::$mode_filter );
+			self::$mode_filter = null;
+		}
+	}
+
+	/**
+	 * Reset request-level caches that memoise modes or routing decisions.
+	 */
+	private static function reset_caches(): void {
+		TMDO_Mode_Manager::reset_cache();
+		TMDO_Routing_Predicate::flush_cache();
+	}
+}

tests/live/run.php

@@ -0,0 +1,49 @@
+<?php
+/**
+ * Live test runner — runs suites inside a real WordPress site (HivePress /
+ * WooCommerce active) so WP core meta flows and query SQL are exercised for real.
+ *
+ * Usage:
+ *   wp --path=<site> eval-file tests/live/run.php <suite> [<suite> ...]
+ *
+ * Exit code 0 when every test passed (XFAIL allowed), 1 otherwise.
+ * Never run against a production site: suites create and delete fixtures.
+ *
+ * No strict_types here: wp eval-file evals this file, and a declare must be
+ * the first statement of a real file. The required files declare it.
+ *
+ * @package WP_Data_Optimizer
+ */
+
+require __DIR__ . '/lib/assert.php';
+require __DIR__ . '/lib/fixtures.php';
+
+$tmdo_live_suites = isset( $args ) ? (array) $args : array();
+
+if ( ! class_exists( 'TMDO_Hook_Bus' ) ) {
+	fwrite( STDERR, "2meet-data-optimizer is not active on this site.\n" );
+	exit( 1 );
+}
+
+if ( empty( $tmdo_live_suites ) ) {
+	$tmdo_live_available = array_map(
+		static function ( $f ) {
+			return basename( $f, '.php' );
+		},
+		glob( __DIR__ . '/suites/*.php' )
+	);
+	fwrite( STDERR, 'Usage: wp eval-file tests/live/run.php <suite> ...  Suites: ' . implode( ', ', $tmdo_live_available ) . "\n" );
+	exit( 1 );
+}
+
+foreach ( $tmdo_live_suites as $tmdo_live_suite ) {
+	$tmdo_live_file = __DIR__ . '/suites/' . basename( (string) $tmdo_live_suite ) . '.php';
+	if ( ! is_file( $tmdo_live_file ) ) {
+		fwrite( STDERR, "Unknown suite: {$tmdo_live_suite}\n" );
+		exit( 1 );
+	}
+	TMDO_Live::$suite = (string) $tmdo_live_suite;
+	require $tmdo_live_file;
+}
+
+exit( TMDO_Live::run() ? 0 : 1 );

tests/live/suites/drift.php

@@ -0,0 +1,77 @@
+<?php
+/**
+ * Suite: TMDO_Drift_Check on a real site (2.2 PR-070).
+ *
+ * - json groups (attachment / nav_menu_item) compare by value: a serialized
+ *   native array and its JSON flat copy are not drift.
+ * - a flat value planted behind the checker's back shows up as exactly one
+ *   diff / one extra, nothing else moves.
+ *
+ * @package WP_Data_Optimizer
+ */
+
+declare(strict_types=1);
+
+/**
+ * Run the drift check for one group and put the site's recorded status back.
+ *
+ * @param string $entity Entity type.
+ * @param string $group  Group.
+ * @return array<string, mixed> Report.
+ */
+function tmdo_live_drift( string $entity, string $group ): array {
+	$status = get_option( TMDO_Drift_Check::OPTION, null );
+	try {
+		return TMDO_Drift_Check::run( $entity, $group );
+	} finally {
+		null === $status ? delete_option( TMDO_Drift_Check::OPTION ) : update_option( TMDO_Drift_Check::OPTION, $status );
+	}
+}
+
+TMDO_Live::test(
+	'drift-check reports no diff for json groups whose values match native',
+	static function () {
+		$checked = 0;
+		foreach ( array( 'attachment', 'nav_menu_item' ) as $group ) {
+			if ( ! in_array( $group, TMDO_Entity_Migration_Engine::backfillable_groups( 'post' ), true )
+				|| ! TMDO_Schema_Manager::table_exists( TMDO_Schema_Manager::get_table_name( 'post', $group ) ) ) {
+				continue;
+			}
+			$report = tmdo_live_drift( 'post', $group );
+			tmdo_live_assert_same( 0, $report['total']['diff'], "post/{$group} diff" );
+			++$checked;
+		}
+		if ( 0 === $checked ) {
+			throw new TMDO_Live_Skip( 'no attachment / nav_menu_item flat table on this site' );
+		}
+	}
+);
+
+TMDO_Live::test(
+	'drift-check counts a planted flat mismatch once and a flat-only value once',
+	static function () {
+		global $wpdb;
+		TMDO_Live_Fixtures::use_modes( array( 'user' => 'disabled' ) );
+		$field = TMDO_Live_Fixtures::field( 'user', 'login_count' );
+		$group = $field['group'];
+		$table = TMDO_Schema_Manager::get_table_name( 'user', $group );
+
+		$before = tmdo_live_drift( 'user', $group )['groups'][ $group ]['keys']['login_count'];
+
+		$mismatch  = TMDO_Live_Fixtures::user();
+		$flat_only = TMDO_Live_Fixtures::user();
+		add_user_meta( $mismatch, 'login_count', '5' );
+		try {
+			$wpdb->insert( $table, array( 'user_id' => $mismatch, 'login_count' => 6 ) );
+			$wpdb->insert( $table, array( 'user_id' => $flat_only, 'login_count' => 9 ) );
+
+			$after = tmdo_live_drift( 'user', $group )['groups'][ $group ]['keys']['login_count'];
+		} finally {
+			$wpdb->query( $wpdb->prepare( "DELETE FROM `{$table}` WHERE user_id IN (%d, %d)", $mismatch, $flat_only ) ); // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
+		}
+
+		tmdo_live_assert_same( $before['diff'] + 1, $after['diff'], 'login_count diff +1' );
+		tmdo_live_assert_same( $before['extra'] + 1, $after['extra'], 'login_count extra +1' );
+		tmdo_live_assert_same( $before['miss'], $after['miss'], 'login_count miss unchanged' );
+	}
+);

tests/live/suites/rest.php

@@ -0,0 +1,76 @@
+<?php
+/**
+ * Suite: the public listings endpoints never return private fields to anonymous users.
+ *
+ * Bug (dev36, 2026-09-26, fixed in 1.1.1): GET /wpdo/v1/listings/{id} is public and
+ * returned every registered hot / cold field, because show_in_rest defaulted to true —
+ * e.g. the infocards IG token fields on hp_vendor and WooCommerce's _purchase_note.
+ *
+ * @package WP_Data_Optimizer
+ */
+
+declare(strict_types=1);
+
+/**
+ * GET a wpdo REST route as an anonymous visitor.
+ *
+ * @param string               $route  Route, e.g. /wpdo/v1/listings/12.
+ * @param array<string, mixed> $params Query parameters.
+ * @return array<int|string, mixed> Response data.
+ */
+function tmdo_live_rest_anonymous( string $route, array $params = array() ): array {
+	$user    = get_current_user_id();
+	$request = new WP_REST_Request( 'GET', $route );
+	$request->set_query_params( $params );
+	wp_set_current_user( 0 );
+	try {
+		$response = rest_do_request( $request );
+	} finally {
+		wp_set_current_user( $user );
+	}
+	tmdo_live_assert_same( 200, $response->get_status(), "GET {$route}" );
+	return (array) $response->get_data();
+}
+
+/**
+ * Keys that must never reach an anonymous visitor.
+ *
+ * @return string[]
+ */
+function tmdo_live_rest_private_keys(): array {
+	return array( 'tmeetic_ig_access_token_enc', 'tmeetic_ig_token_expiry', 'tmeetic_ig_user_id', '_purchase_note' );
+}
+
+TMDO_Live::test(
+	'GET /wpdo/v1/listings/{id} returns no private field to an anonymous visitor',
+	static function () {
+		$checked = 0;
+		foreach ( array( 'hp_vendor', 'product' ) as $post_type ) {
+			$ids = get_posts( array( 'post_type' => $post_type, 'post_status' => 'publish', 'numberposts' => 1, 'fields' => 'ids' ) );
+			if ( ! $ids ) {
+				continue;
+			}
+			$data = tmdo_live_rest_anonymous( '/wpdo/v1/listings/' . (int) $ids[0] );
+			tmdo_live_assert_same( array(), array_values( array_intersect( tmdo_live_rest_private_keys(), array_keys( $data ) ) ), "{$post_type} #{$ids[0]} private keys" );
+			tmdo_live_assert_same( array(), array_values( preg_grep( '/^_|token|secret|passw|api_?key/i', array_keys( $data ) ) ), "{$post_type} #{$ids[0]} protected / credential-like keys" );
+			++$checked;
+		}
+		if ( 0 === $checked ) {
+			throw new TMDO_Live_Skip( 'no published hp_vendor or product on this site' );
+		}
+	}
+);
+
+TMDO_Live::test(
+	'GET /wpdo/v1/listings returns no private field to an anonymous visitor',
+	static function () {
+		foreach ( array( 'hp_vendor', 'product', 'hp_listing' ) as $post_type ) {
+			if ( ! post_type_exists( $post_type ) ) {
+				continue;
+			}
+			foreach ( tmdo_live_rest_anonymous( '/wpdo/v1/listings', array( 'post_type' => $post_type, 'per_page' => 5 ) ) as $item ) {
+				tmdo_live_assert_same( array(), array_values( preg_grep( '/^_|token|secret|passw|api_?key/i', array_keys( (array) $item ) ) ), "{$post_type} list item keys" );
+			}
+		}
+	}
+);

tests/live/suites/resync.php

@@ -0,0 +1,138 @@
+<?php
+/**
+ * Suite: in dual_write / shadow_read the flat value always follows native meta.
+ *
+ * Before PR-057 the Hook Bus wrote flat in the pre-filter, before WP decided
+ * whether native changed at all: a non-matching prev_value, add($unique) on an
+ * existing key or a key change via update_metadata_by_mid left flat and native
+ * apart, and nothing healed a flat value made stale by a direct SQL write.
+ *
+ * @package WP_Data_Optimizer
+ */
+
+declare(strict_types=1);
+
+/**
+ * Entity cases: [entity type, key, fixture factory, post type for group lookup].
+ *
+ * @return array<string, array{0:string, 1:string, 2:callable, 3:string}>
+ */
+function tmdo_live_resync_cases(): array {
+	return array(
+		'user first_name'  => array( 'user', 'first_name', array( 'TMDO_Live_Fixtures', 'user' ), '' ),
+		'hp_listing price' => array( 'post', 'hp_price', static fn() => TMDO_Live_Fixtures::post( 'hp_listing' ), 'hp_listing' ),
+		'hp term icon'     => array( 'term', 'hp_icon', static fn() => TMDO_Live_Fixtures::term( 'hp_listing_category' ), '' ),
+		'hp review rating' => array( 'comment', 'hp_rating', static fn() => TMDO_Live_Fixtures::comment( 'hp_listing', 'hp_review' ), '' ),
+	);
+}
+
+/**
+ * Assert flat equals the first native value (numeric-aware; missing native = NULL flat).
+ */
+function tmdo_live_assert_in_step( string $type, int $id, string $key, string $post_type, string $context ): void {
+	$native = TMDO_Live_Fixtures::native( $type, $id, $key );
+	$flat   = TMDO_Live_Fixtures::flat( $type, $id, $key, $post_type );
+	$expect = $native ? $native[0] : null;
+	if ( 'NO-ROW' === $flat ) {
+		$flat = null;
+	}
+	$same = ( null === $expect || null === $flat )
+		? $expect === $flat
+		: ( is_numeric( $expect ) && is_numeric( $flat ) ? (float) $expect === (float) $flat : $expect === $flat );
+	tmdo_live_assert_true( $same, sprintf( '%s — native %s, flat %s', $context, var_export( $expect, true ), var_export( $flat, true ) ) ); // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_var_export
+}
+
+foreach ( array( 'dual_write', 'shadow_read' ) as $tmdo_live_mode ) {
+	foreach ( tmdo_live_resync_cases() as $tmdo_live_label => $tmdo_live_case ) {
+		list( $type, $key, $make, $pt ) = $tmdo_live_case;
+
+		TMDO_Live::test(
+			"{$tmdo_live_mode} {$tmdo_live_label}: update, same value, delete",
+			static function () use ( $tmdo_live_mode, $type, $key, $make, $pt ) {
+				TMDO_Live_Fixtures::field( $type, $key, $pt );
+				TMDO_Live_Fixtures::use_modes( array( $type => $tmdo_live_mode ) );
+				$id = $make();
+
+				update_metadata( $type, $id, $key, '11' );
+				tmdo_live_assert_in_step( $type, $id, $key, $pt, 'new key' );
+				update_metadata( $type, $id, $key, '12' );
+				tmdo_live_assert_in_step( $type, $id, $key, $pt, 'update' );
+				update_metadata( $type, $id, $key, '12' );
+				tmdo_live_assert_in_step( $type, $id, $key, $pt, 'same value' );
+				delete_metadata( $type, $id, $key, '12' );
+				tmdo_live_assert_in_step( $type, $id, $key, $pt, 'delete with value' );
+			}
+		);
+
+		TMDO_Live::test(
+			"{$tmdo_live_mode} {$tmdo_live_label}: writes WP refuses leave flat alone",
+			static function () use ( $tmdo_live_mode, $type, $key, $make, $pt ) {
+				TMDO_Live_Fixtures::field( $type, $key, $pt );
+				TMDO_Live_Fixtures::use_modes( array( $type => $tmdo_live_mode ) );
+				$id = $make();
+				update_metadata( $type, $id, $key, '21' );
+
+				update_metadata( $type, $id, $key, '22', 'no-such-previous-value' );
+				tmdo_live_assert_in_step( $type, $id, $key, $pt, 'non-matching prev_value' );
+				add_metadata( $type, $id, $key, '23', true );
+				tmdo_live_assert_in_step( $type, $id, $key, $pt, 'add unique on existing key' );
+				update_metadata( $type, $id, $key, '24', '21' );
+				tmdo_live_assert_in_step( $type, $id, $key, $pt, 'matching prev_value' );
+			}
+		);
+
+		TMDO_Live::test(
+			"{$tmdo_live_mode} {$tmdo_live_label}: stale flat heals on the next write, key change by meta_id",
+			static function () use ( $tmdo_live_mode, $type, $key, $make, $pt ) {
+				global $wpdb;
+				TMDO_Live_Fixtures::field( $type, $key, $pt );
+				TMDO_Live_Fixtures::use_modes( array( $type => $tmdo_live_mode ) );
+				$id = $make();
+				update_metadata( $type, $id, $key, '31' );
+
+				$table  = _get_meta_table( $type );
+				$id_col = $type . '_id';
+				$pk     = 'user' === $type ? 'umeta_id' : 'meta_id';
+
+				// A direct SQL write (as WooCommerce does for stock) leaves flat stale.
+				// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared -- WP meta table names.
+				$wpdb->query( $wpdb->prepare( "UPDATE {$table} SET meta_value = '32' WHERE {$id_col} = %d AND meta_key = %s", $id, $key ) );
+				wp_cache_delete( $id, $type . '_meta' );
+				update_metadata( $type, $id, $key, '33' );
+				tmdo_live_assert_in_step( $type, $id, $key, $pt, 'next write after a direct SQL change' );
+
+				// Renaming the key by meta_id removes it from native: flat must follow.
+				// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared -- WP meta table names.
+				$mid = (int) $wpdb->get_var( $wpdb->prepare( "SELECT {$pk} FROM {$table} WHERE {$id_col} = %d AND meta_key = %s", $id, $key ) );
+				update_metadata_by_mid( $type, $mid, '34', 'tmdo_live_renamed' );
+				tmdo_live_assert_in_step( $type, $id, $key, $pt, 'key renamed by meta_id' );
+			}
+		);
+	}
+}
+
+TMDO_Live::test(
+	'deleting an entity leaves no flat row behind (dual_write and shadow_read)',
+	static function () {
+		require_once ABSPATH . 'wp-admin/includes/user.php';
+		$deleters = array(
+			'user'    => static fn( int $id ) => wp_delete_user( $id ),
+			'post'    => static fn( int $id ) => wp_delete_post( $id, true ),
+			'term'    => static fn( int $id ) => wp_delete_term( $id, 'hp_listing_category' ),
+			'comment' => static fn( int $id ) => wp_delete_comment( $id, true ),
+		);
+		foreach ( array( 'dual_write', 'shadow_read' ) as $mode ) {
+			foreach ( tmdo_live_resync_cases() as $label => $case ) {
+				list( $type, $key, $make, $pt ) = $case;
+				TMDO_Live_Fixtures::field( $type, $key, $pt );
+				TMDO_Live_Fixtures::use_modes( array( $type => $mode ) );
+				$id = $make();
+				update_metadata( $type, $id, $key, '41' );
+
+				$deleters[ $type ]( $id );
+
+				tmdo_live_assert_same( 'NO-ROW', TMDO_Live_Fixtures::flat( $type, $id, $key, $pt ), "{$mode} {$label}: flat row after delete" );
+			}
+		}
+	}
+);

tests/live/suites/router.php

@@ -0,0 +1,583 @@
+<?php
+/**
+ * Suite: a routed WP_Query returns exactly what the native meta_query returns.
+ *
+ * Bugs (dev36 qbench, 2026-09-26): the post router pulled registered clauses
+ * out of any meta_query and ANDed them, so OR relations (Q04, Q16), queries on
+ * several post types (Q08), untyped comparisons on numeric columns (Q14,
+ * native compares strings) and orderby on a named clause (Q15) returned other
+ * posts than WordPress would; LIKE compared without wildcards (Q06). A key
+ * of a second group (wp_core _thumbnail_id, Q05) was never joined, and every
+ * routed query carried a GROUP BY although flat rows are one per post.
+ *
+ * Every case runs the same query twice on fixture posts — router hooks off,
+ * then on with post mode shadow_read — and compares the ids in order.
+ *
+ * @package WP_Data_Optimizer
+ */
+
+declare(strict_types=1);
+
+/**
+ * Run a WP_Query restricted to $ids, optionally through the post router.
+ *
+ * @param array<string, mixed> $args   Query args (meta_query, post_type, orderby …).
+ * @param int[]                $ids    Fixture posts to search within.
+ * @param bool                 $routed Hook a TMDO_Post_Query_Router for this query.
+ * @return array{ids:int[], routed:bool, sql:string}
+ */
+function tmdo_live_router_query( array $args, array $ids, bool $routed ): array {
+	global $wpdb;
+	$router = new TMDO_Post_Query_Router();
+	if ( $routed ) {
+		$router->register_hooks();
+	}
+	try {
+		$wpdb->last_error = '';
+		$q                = new WP_Query(
+			$args + array(
+				'post__in'         => $ids,
+				'post_status'      => 'any',
+				'posts_per_page'   => -1,
+				'orderby'          => 'ID',
+				'order'            => 'ASC',
+				'fields'           => 'ids',
+				'no_found_rows'    => true,
+				'cache_results'    => false,
+				'suppress_filters' => false,
+			)
+		);
+	} finally {
+		tmdo_live_router_unhook( $router );
+	}
+	tmdo_live_assert_same( '', $wpdb->last_error, 'SQL error' );
+	return array(
+		'ids'    => array_map( 'intval', $q->posts ),
+		'routed' => ! empty( $q->get( 'wpdo_post_clauses' ) ) || ! empty( $q->get( 'wpdo_post_sort' ) ),
+		'sql'    => (string) $q->request,
+	);
+}
+
+/**
+ * Remove every hook TMDO_Post_Query_Router::register_hooks() added.
+ *
+ * @param TMDO_Post_Query_Router $router Router instance.
+ */
+function tmdo_live_router_unhook( TMDO_Post_Query_Router $router ): void {
+	foreach ( array( 'pre_get_posts', 'posts_join', 'posts_where', 'posts_orderby', 'posts_request', 'split_the_query', 'found_posts_query' ) as $method ) {
+		foreach ( 'posts_request' === $method ? array( 'posts_request', 'posts_request_ids' ) : array( $method ) as $hook ) {
+			$priority = has_filter( $hook, array( $router, $method ) );
+			if ( false !== $priority ) {
+				remove_filter( $hook, array( $router, $method ), $priority );
+			}
+		}
+	}
+}
+
+/**
+ * Create posts of $post_type with the given meta, in post mode shadow_read
+ * (so the Hook Bus keeps the flat rows in step).
+ *
+ * @param string                              $post_type Post type.
+ * @param array<string, array<string, mixed>> $posts     Label => meta.
+ * @return array<string, int> Label => post id.
+ */
+function tmdo_live_router_posts( string $post_type, array $posts ): array {
+	$ids = array();
+	foreach ( $posts as $label => $meta ) {
+		$ids[ $label ] = TMDO_Live_Fixtures::post( $post_type );
+		foreach ( $meta as $key => $value ) {
+			update_post_meta( $ids[ $label ], $key, $value );
+		}
+	}
+	return $ids;
+}
+
+/**
+ * Listing fixtures shared by the hp_listing cases.
+ *
+ * @return array<string, int>
+ */
+function tmdo_live_router_listings(): array {
+	foreach ( array( 'hp_price', 'hp_verified', 'hp_featured', 'hp_hourly_rate' ) as $key ) {
+		TMDO_Live_Fixtures::field( 'post', $key, 'hp_listing' );
+	}
+	TMDO_Live_Fixtures::use_modes( array( 'post' => 'shadow_read' ) );
+	return tmdo_live_router_posts(
+		'hp_listing',
+		array(
+			'L1' => array( 'hp_price' => '10000', 'hp_featured' => '1', 'hp_verified' => '0', 'hp_hourly_rate' => '40' ),
+			'L2' => array( 'hp_price' => '9500', 'hp_verified' => '1', 'hp_hourly_rate' => '30' ),
+			'L3' => array( 'hp_price' => '500', 'hp_featured' => '0', 'hp_hourly_rate' => '45' ),
+			'L4' => array( 'hp_price' => '20000', 'tmdo_live_unregistered' => '0' ),
+			'L5' => array(),
+		)
+	);
+}
+
+/**
+ * Assert the routed query equals native; optionally that it was routed at all.
+ *
+ * @param array<string, mixed> $args          Query args.
+ * @param int[]                $ids           Fixture ids.
+ * @param bool|null            $expect_routed true / false to assert, null to ignore.
+ * @param bool                 $ordered       Compare order too (false when the order has ties).
+ */
+function tmdo_live_router_assert_native( array $args, array $ids, ?bool $expect_routed = null, bool $ordered = true ): void {
+	$native = tmdo_live_router_query( $args, $ids, false );
+	$routed = tmdo_live_router_query( $args, $ids, true );
+	if ( ! $ordered ) {
+		sort( $native['ids'] );
+		sort( $routed['ids'] );
+	}
+	tmdo_live_assert_same( $native['ids'], $routed['ids'], 'routed ids vs native' );
+	if ( null !== $expect_routed ) {
+		tmdo_live_assert_same( $expect_routed, $routed['routed'], 'query routed to the flat table' );
+	}
+	if ( $routed['routed'] ) {
+		tmdo_live_assert_true( false === stripos( $routed['sql'], 'GROUP BY' ), 'routed query adds no GROUP BY: ' . $routed['sql'] );
+	}
+}
+
+TMDO_Live::test(
+	'Q04 OR across registered keys returns the native posts',
+	static function () {
+		$l = tmdo_live_router_listings();
+		tmdo_live_router_assert_native(
+			array(
+				'post_type'  => 'hp_listing',
+				'meta_query' => array(
+					'relation' => 'OR',
+					array( 'key' => 'hp_featured', 'value' => '1' ),
+					array( 'key' => 'hp_verified', 'value' => '1' ),
+				),
+			),
+			array_values( $l )
+		);
+	}
+);
+
+TMDO_Live::test(
+	'Q16 OR mixing a registered and an unregistered key returns the native posts',
+	static function () {
+		$l = tmdo_live_router_listings();
+		tmdo_live_router_assert_native(
+			array(
+				'post_type'  => 'hp_listing',
+				'meta_query' => array(
+					'relation' => 'OR',
+					array( 'key' => 'hp_price', 'value' => 1000, 'compare' => '<', 'type' => 'NUMERIC' ),
+					array( 'key' => 'tmdo_live_unregistered', 'value' => '0' ),
+				),
+			),
+			array_values( $l )
+		);
+	}
+);
+
+TMDO_Live::test(
+	'Q14 untyped comparison on a numeric column keeps string semantics',
+	static function () {
+		$l = tmdo_live_router_listings();
+		tmdo_live_router_assert_native(
+			array(
+				'post_type'  => 'hp_listing',
+				'meta_query' => array( array( 'key' => 'hp_price', 'value' => '9000', 'compare' => '>' ) ),
+			),
+			array_values( $l )
+		);
+	}
+);
+
+TMDO_Live::test(
+	'Q15 orderby on a named clause keeps the native order, routed',
+	static function () {
+		$l = tmdo_live_router_listings();
+		tmdo_live_router_assert_native(
+			array(
+				'post_type'  => 'hp_listing',
+				'meta_query' => array(
+					'rate'  => array( 'key' => 'hp_hourly_rate', 'value' => 50, 'compare' => '<', 'type' => 'NUMERIC' ),
+					'price' => array( 'key' => 'hp_price', 'compare' => 'EXISTS', 'type' => 'NUMERIC' ),
+				),
+				'orderby'    => 'price',
+				'order'      => 'ASC',
+			),
+			array_values( $l ),
+			true
+		);
+	}
+);
+
+TMDO_Live::test(
+	'Q08 several post types return the native posts',
+	static function () {
+		$l = tmdo_live_router_listings();
+		TMDO_Live_Fixtures::field( 'post', 'hp_budget', 'hp_request' );
+		$r = tmdo_live_router_posts( 'hp_request', array( 'R1' => array( 'hp_budget' => '90000' ) ) );
+		update_post_meta( $l['L2'], 'hp_budget', '85000' );
+		tmdo_live_router_assert_native(
+			array(
+				'post_type'  => array( 'hp_listing', 'hp_request' ),
+				'meta_query' => array( array( 'key' => 'hp_budget', 'value' => 80000, 'compare' => '>=', 'type' => 'NUMERIC' ) ),
+			),
+			array_merge( array_values( $l ), array_values( $r ) )
+		);
+	}
+);
+
+TMDO_Live::test(
+	'typed AND on registered keys is routed and returns the native posts',
+	static function () {
+		$l = tmdo_live_router_listings();
+		tmdo_live_router_assert_native(
+			array(
+				'post_type'  => 'hp_listing',
+				'meta_query' => array(
+					array( 'key' => 'hp_price', 'value' => array( 9000, 15000 ), 'compare' => 'BETWEEN', 'type' => 'NUMERIC' ),
+					array( 'key' => 'hp_verified', 'value' => '1' ),
+				),
+			),
+			array_values( $l ),
+			true
+		);
+	}
+);
+
+TMDO_Live::test(
+	'Q06 LIKE matches substrings and escapes wildcards, routed',
+	static function () {
+		// A text key of wp_core (WooCommerce's _sku left the flat tables in 1.2.0).
+		TMDO_Live_Fixtures::field( 'post', '_wp_page_template' );
+		TMDO_Live_Fixtures::use_modes( array( 'post' => 'shadow_read' ) );
+		$p = tmdo_live_router_posts(
+			'post',
+			array(
+				'P1' => array( '_wp_page_template' => 'tmdo-live-B1-1' ),
+				'P2' => array( '_wp_page_template' => 'tmdo-live-B1-10' ),
+				'P3' => array( '_wp_page_template' => 'tmdo-live-B2-1' ),
+			)
+		);
+		foreach ( array( 'B1-1', 'B1_1' ) as $needle ) {
+			tmdo_live_router_assert_native(
+				array(
+					'post_type'  => 'post',
+					'meta_query' => array( array( 'key' => '_wp_page_template', 'value' => $needle, 'compare' => 'LIKE' ) ),
+				),
+				array_values( $p ),
+				true
+			);
+		}
+	}
+);
+
+TMDO_Live::test(
+	'Q05 keys of two groups are both joined, routed',
+	static function () {
+		$l = tmdo_live_router_listings();
+		TMDO_Live_Fixtures::field( 'post', '_thumbnail_id', 'hp_listing' );
+		update_post_meta( $l['L1'], '_thumbnail_id', '123' );
+		update_post_meta( $l['L3'], '_thumbnail_id', '124' );
+		tmdo_live_router_assert_native(
+			array(
+				'post_type'  => 'hp_listing',
+				'meta_query' => array(
+					array( 'key' => 'hp_hourly_rate', 'value' => 42, 'compare' => '>=', 'type' => 'NUMERIC' ),
+					array( 'key' => '_thumbnail_id', 'compare' => 'EXISTS' ),
+				),
+			),
+			array_values( $l ),
+			true
+		);
+	}
+);
+
+TMDO_Live::test(
+	'NOT EXISTS with explicit statuses and date order keeps posts without a flat row',
+	static function () {
+		$l = tmdo_live_router_listings();
+		tmdo_live_router_assert_native(
+			array(
+				'post_type'   => 'hp_listing',
+				'post_status' => array( 'draft' ),
+				'orderby'     => 'date',
+				'order'       => 'DESC',
+				'meta_query'  => array( array( 'key' => 'hp_featured', 'compare' => 'NOT EXISTS' ) ),
+			),
+			array_values( $l ),
+			true,
+			false
+		);
+	}
+);
+
+TMDO_Live::test(
+	'HivePress sort shape (NOT EXISTS OR EXISTS, named clause) keeps the native order, routed',
+	static function () {
+		$l = tmdo_live_router_listings();
+		foreach ( array( 'ASC', 'DESC' ) as $order ) {
+			tmdo_live_router_assert_native(
+				array(
+					'post_type'  => 'hp_listing',
+					'meta_query' => array(
+						array(
+							'relation'     => 'OR',
+							'price__order' => array( 'key' => 'hp_price', 'type' => 'DECIMAL', 'compare' => 'NOT EXISTS' ),
+							array( 'key' => 'hp_price', 'type' => 'DECIMAL', 'compare' => 'EXISTS' ),
+						),
+					),
+					'orderby'    => 'price__order',
+					'order'      => $order,
+				),
+				array_values( $l ),
+				true
+			);
+		}
+	}
+);
+
+TMDO_Live::test(
+	'Q07 meta_key + meta_value_num keeps the native posts and order, routed',
+	static function () {
+		$l = tmdo_live_router_listings();
+		tmdo_live_router_assert_native(
+			array(
+				'post_type' => 'hp_listing',
+				'meta_key'  => 'hp_price',
+				'orderby'   => 'meta_value_num',
+				'order'     => 'DESC',
+			),
+			array_values( $l ),
+			true
+		);
+	}
+);
+
+TMDO_Live::test(
+	'a routed full-row search keeps the split query (IDs first) and native found_posts',
+	static function () {
+		global $wpdb;
+		$l    = tmdo_live_router_listings();
+		$args = array(
+			'post_type'      => 'hp_listing',
+			'post__in'       => array_values( $l ),
+			'post_status'    => 'any',
+			'posts_per_page' => 2,
+			'orderby'        => 'ID',
+			'order'          => 'ASC',
+			'meta_query'     => array( array( 'key' => 'hp_price', 'value' => 1000, 'compare' => '>=', 'type' => 'NUMERIC' ) ),
+		);
+		$native = new WP_Query( $args );
+		$router = new TMDO_Post_Query_Router();
+		$router->register_hooks();
+		try {
+			$routed = new WP_Query( $args );
+		} finally {
+			tmdo_live_router_unhook( $router );
+		}
+
+		tmdo_live_assert_same( wp_list_pluck( $native->posts, 'ID' ), wp_list_pluck( $routed->posts, 'ID' ), 'page of posts' );
+		tmdo_live_assert_same( $native->found_posts, $routed->found_posts, 'found_posts' );
+		tmdo_live_assert_true( false !== strpos( $routed->request, 'wpdoflat_' ), 'routed: ' . $routed->request );
+		tmdo_live_assert_true( 1 === preg_match( '/^\s*SELECT\s+' . preg_quote( $wpdb->posts, '/' ) . '\.ID\s/', $routed->request ), 'IDs first: ' . $routed->request );
+	}
+);
+
+TMDO_Live::test(
+	'a filtered search ordered by a flat column drives from the flat table and matches native',
+	static function () {
+		foreach ( array( 'hp_price', 'hp_hourly_rate' ) as $key ) {
+			TMDO_Live_Fixtures::field( 'post', $key, 'hp_listing' );
+		}
+		TMDO_Live_Fixtures::use_modes( array( 'post' => 'shadow_read' ) );
+		// A price band no seeded listing uses keeps the result to the fixtures.
+		tmdo_live_router_posts(
+			'hp_listing',
+			array(
+				'A' => array( 'hp_price' => '9876501', 'hp_hourly_rate' => '12' ),
+				'B' => array( 'hp_price' => '9876502', 'hp_hourly_rate' => '15' ),
+				'C' => array( 'hp_price' => '9876503' ),
+			)
+		);
+		$args   = array(
+			'post_type'        => 'hp_listing',
+			'post_status'      => 'any',
+			'posts_per_page'   => 10,
+			'fields'           => 'ids',
+			'suppress_filters' => false,
+			'meta_query'       => array( array( 'key' => 'hp_price', 'value' => array( 9876500, 9876510 ), 'compare' => 'BETWEEN', 'type' => 'NUMERIC' ) ),
+			'meta_key'         => 'hp_price',
+			'orderby'          => 'meta_value_num',
+			'order'            => 'DESC',
+		);
+		$native = new WP_Query( $args );
+		$router = new TMDO_Post_Query_Router();
+		$router->register_hooks();
+		try {
+			$routed = new WP_Query( $args );
+		} finally {
+			tmdo_live_router_unhook( $router );
+		}
+
+		tmdo_live_assert_same( array_map( 'intval', $native->posts ), array_map( 'intval', $routed->posts ), 'ids' );
+		tmdo_live_assert_same( $native->found_posts, $routed->found_posts, 'found_posts' );
+		tmdo_live_assert_true( 0 === strpos( ltrim( $routed->request ), 'SELECT STRAIGHT_JOIN' ), 'flat-first: ' . $routed->request );
+	}
+);
+
+/**
+ * HivePress-style sort-only search (rating__order), fields ids, first page.
+ * DECIMAL(10,1): what the HivePress Rating field (decimals 1) sends.
+ *
+ * @param string $order ASC | DESC.
+ * @return array<string, mixed> WP_Query args.
+ */
+function tmdo_live_router_rating_sort( string $order ): array {
+	return array(
+		'post_type'        => 'hp_listing',
+		'post_status'      => 'publish',
+		'posts_per_page'   => 10,
+		'fields'           => 'ids',
+		'suppress_filters' => false,
+		'meta_query'       => array(
+			array(
+				'relation'      => 'OR',
+				'rating__order' => array( 'key' => 'hp_rating', 'type' => 'DECIMAL(10,1)', 'compare' => 'NOT EXISTS' ),
+				array( 'key' => 'hp_rating', 'type' => 'DECIMAL(10,1)', 'compare' => 'EXISTS' ),
+			),
+		),
+		'orderby'          => 'rating__order',
+		'order'            => $order,
+	);
+}
+
+/**
+ * The native sort key of each post, in order (null without a rating). On the
+ * whole site many listings share a rating and native orders ties by chance,
+ * so a page is compared by its keys, not its ids.
+ *
+ * @param array<int|string> $ids Post ids.
+ * @return array<int, string|null>
+ */
+function tmdo_live_router_rating_keys( array $ids ): array {
+	global $wpdb;
+	$ids = array_map( 'intval', $ids );
+	if ( empty( $ids ) ) {
+		return array();
+	}
+	$rows = $wpdb->get_results(
+		"SELECT post_id, CAST(meta_value AS DECIMAL(10,1)) AS k FROM {$wpdb->postmeta} WHERE meta_key = 'hp_rating' AND post_id IN (" . implode( ',', $ids ) . ')',
+		OBJECT_K
+	);
+	return array_map( static fn( $id ) => isset( $rows[ $id ] ) ? (string) $rows[ $id ]->k : null, $ids );
+}
+
+/**
+ * Native and routed runs of the same query.
+ *
+ * @param array<string, mixed> $args Query args.
+ * @return array{0:WP_Query, 1:WP_Query}
+ */
+function tmdo_live_router_native_and_routed( array $args ): array {
+	$native = new WP_Query( $args );
+	$router = new TMDO_Post_Query_Router();
+	$router->register_hooks();
+	try {
+		$routed = new WP_Query( $args );
+	} finally {
+		tmdo_live_router_unhook( $router );
+	}
+	return array( $native, $routed );
+}
+
+TMDO_Live::test(
+	'a sort-only search drives from the flat table when every post of the type has a flat row (2.2 PR-079)',
+	static function () {
+		TMDO_Live_Fixtures::field( 'post', 'hp_rating', 'hp_listing' );
+		TMDO_Live_Fixtures::use_modes( array( 'post' => 'shadow_read' ) );
+		TMDO_Post_Query_Router::forget_coverage();
+		foreach ( array( 'DESC', 'ASC' ) as $order ) {
+			list( $native, $routed ) = tmdo_live_router_native_and_routed( tmdo_live_router_rating_sort( $order ) );
+			tmdo_live_assert_same( tmdo_live_router_rating_keys( $native->posts ), tmdo_live_router_rating_keys( $routed->posts ), "{$order} sort keys" );
+			tmdo_live_assert_same( $native->found_posts, $routed->found_posts, "{$order} found_posts" );
+			tmdo_live_assert_true( 0 === strpos( ltrim( $routed->request ), 'SELECT STRAIGHT_JOIN' ), "{$order} flat-first: " . $routed->request );
+		}
+	}
+);
+
+TMDO_Live::test(
+	'a sort-only search keeps the LEFT JOIN while a post of the type has no flat row (2.2 PR-079)',
+	static function () {
+		global $wpdb;
+		TMDO_Live_Fixtures::field( 'post', 'hp_rating', 'hp_listing' );
+		TMDO_Live_Fixtures::use_modes( array( 'post' => 'shadow_read' ) );
+		$bare = TMDO_Live_Fixtures::post( 'hp_listing' );
+		$wpdb->delete( TMDO_Schema_Manager::get_table_name( 'post', 'hp_listing_core' ), array( 'post_id' => $bare ) );
+		TMDO_Post_Query_Router::forget_coverage();
+		try {
+			list( $native, $routed ) = tmdo_live_router_native_and_routed( tmdo_live_router_rating_sort( 'DESC' ) );
+		} finally {
+			TMDO_Post_Query_Router::forget_coverage();
+		}
+		tmdo_live_assert_same( tmdo_live_router_rating_keys( $native->posts ), tmdo_live_router_rating_keys( $routed->posts ), 'sort keys' );
+		tmdo_live_assert_same( $native->found_posts, $routed->found_posts, 'found_posts' );
+		tmdo_live_assert_true( false === strpos( $routed->request, 'STRAIGHT_JOIN' ), 'not flat-first: ' . $routed->request );
+	}
+);
+
+TMDO_Live::test(
+	'a post created while the router is active gets its empty flat row (2.2 PR-079)',
+	static function () {
+		global $wpdb;
+		TMDO_Live_Fixtures::field( 'post', 'hp_rating', 'hp_listing' );
+		TMDO_Live_Fixtures::use_modes( array( 'post' => 'shadow_read' ) );
+		$router = new TMDO_Post_Query_Router();
+		$router->register_hooks();
+		try {
+			$id = TMDO_Live_Fixtures::post( 'hp_listing' );
+		} finally {
+			tmdo_live_router_unhook( $router );
+		}
+		$table = TMDO_Schema_Manager::get_table_name( 'post', 'hp_listing_core' );
+		tmdo_live_assert_same( '1', $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM `{$table}` WHERE post_id = %d", $id ) ), 'flat row created' ); // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
+	}
+);
+
+TMDO_Live::test(
+	'a flat-first search drops the GROUP BY WordPress adds for a subquery-only tax query (2.2 PR-079)',
+	static function () {
+		TMDO_Live_Fixtures::field( 'post', 'hp_rating', 'hp_listing' );
+		TMDO_Live_Fixtures::use_modes( array( 'post' => 'shadow_read' ) );
+		TMDO_Post_Query_Router::forget_coverage();
+		// Like WooCommerce's product_visibility exclusion on front-end searches: NOT IN
+		// is a subquery, yet WordPress groups by posts.ID for any tax query.
+		$args = tmdo_live_router_rating_sort( 'DESC' ) + array(
+			'tax_query' => array( array( 'taxonomy' => 'hp_listing_category', 'field' => 'term_id', 'terms' => array( 999999999 ), 'operator' => 'NOT IN' ) ),
+		);
+		list( $native, $routed ) = tmdo_live_router_native_and_routed( $args );
+		tmdo_live_assert_same( tmdo_live_router_rating_keys( $native->posts ), tmdo_live_router_rating_keys( $routed->posts ), 'sort keys' );
+		tmdo_live_assert_same( $native->found_posts, $routed->found_posts, 'found_posts' );
+		tmdo_live_assert_true( 0 === strpos( ltrim( $routed->request ), 'SELECT STRAIGHT_JOIN' ), 'flat-first: ' . $routed->request );
+		tmdo_live_assert_true( false === stripos( $routed->request, 'GROUP BY' ), 'no GROUP BY: ' . $routed->request );
+	}
+);
+
+TMDO_Live::test(
+	'a flat-first search keeps the GROUP BY when a tax query joins term relationships (2.2 PR-079)',
+	static function () {
+		TMDO_Live_Fixtures::field( 'post', 'hp_rating', 'hp_listing' );
+		TMDO_Live_Fixtures::use_modes( array( 'post' => 'shadow_read' ) );
+		TMDO_Post_Query_Router::forget_coverage();
+		$terms = get_terms( array( 'taxonomy' => 'hp_listing_category', 'number' => 2, 'hide_empty' => true, 'fields' => 'ids' ) );
+		if ( count( (array) $terms ) < 2 ) {
+			throw new TMDO_Live_Skip( 'needs two used hp_listing_category terms' );
+		}
+		$args = tmdo_live_router_rating_sort( 'DESC' ) + array(
+			'tax_query' => array( array( 'taxonomy' => 'hp_listing_category', 'field' => 'term_id', 'terms' => $terms, 'operator' => 'IN' ) ),
+		);
+		list( $native, $routed ) = tmdo_live_router_native_and_routed( $args );
+		tmdo_live_assert_same( tmdo_live_router_rating_keys( $native->posts ), tmdo_live_router_rating_keys( $routed->posts ), 'sort keys' );
+		tmdo_live_assert_same( $native->found_posts, $routed->found_posts, 'found_posts' );
+		tmdo_live_assert_true( false !== stripos( $routed->request, 'GROUP BY' ), 'GROUP BY kept: ' . $routed->request );
+	}
+);

tests/live/suites/serialized.php

@@ -0,0 +1,59 @@
+<?php
+/**
+ * Suite: array meta values survive the flat tables (no "Array" literal).
+ *
+ * Bug (dev36, 2026-09-26): admin_prefs `community-events-location` (text) and
+ * `wp_persisted_preferences` (textarea) hold arrays; the type caster stored
+ * (string) $array = "Array", and bridge-restore-native wrote it back to native.
+ *
+ * @package WP_Data_Optimizer
+ */
+
+declare(strict_types=1);
+
+TMDO_Live::test(
+	'dual_write: array written with update_user_meta is stored serialized',
+	static function () {
+		TMDO_Live_Fixtures::field( 'user', 'wp_persisted_preferences' );
+		TMDO_Live_Fixtures::use_modes( array( 'user' => 'dual_write' ) );
+		$uid   = TMDO_Live_Fixtures::user();
+		$prefs = array( 'core' => array( 'welcomeGuide' => false ) );
+		$loc   = array( 'ip' => '192.0.2.0' );
+
+		update_user_meta( $uid, 'wp_persisted_preferences', $prefs );
+		update_user_meta( $uid, 'community-events-location', $loc );
+
+		tmdo_live_assert_same( serialize( $prefs ), TMDO_Live_Fixtures::flat( 'user', $uid, 'wp_persisted_preferences' ), 'flat wp_persisted_preferences' );
+		tmdo_live_assert_same( serialize( $loc ), TMDO_Live_Fixtures::flat( 'user', $uid, 'community-events-location' ), 'flat community-events-location' );
+	}
+);
+
+TMDO_Live::test(
+	'backfill: native array meta is flattened serialized, not "Array"',
+	static function () {
+		TMDO_Live_Fixtures::field( 'user', 'community-events-location' );
+		TMDO_Live_Fixtures::use_modes( array( 'user' => 'disabled' ) );
+		$uid = TMDO_Live_Fixtures::user();
+		$loc = array( 'ip' => '198.51.100.0' );
+		update_user_meta( $uid, 'community-events-location', $loc );
+		tmdo_live_assert_same( array( serialize( $loc ) ), TMDO_Live_Fixtures::native( 'user', $uid, 'community-events-location' ), 'native precondition' );
+
+		$field = TMDO_Entity_Registry::get_field( 'user', 'community-events-location' );
+		TMDO_Entity_Migration_Engine::reset_checkpoint( 'user', $field['group'] );
+		TMDO_Entity_Migration_Engine::migrate_group( 'user', $field['group'], array( 'sleep_ms' => 0, 'resume' => false ) );
+
+		tmdo_live_assert_same( serialize( $loc ), TMDO_Live_Fixtures::flat( 'user', $uid, 'community-events-location' ), 'flat after backfill' );
+	}
+);
+
+TMDO_Live::test(
+	'read path: from_db returns the array, not a serialized string',
+	static function () {
+		$field = TMDO_Live_Fixtures::field( 'user', 'wp_persisted_preferences' );
+		$prefs = array( 'core/edit-post' => array( 'panels' => array( 'a', 'b' ) ) );
+
+		$stored = TMDO_Type_Caster::to_db( $prefs, $field );
+
+		tmdo_live_assert_same( $prefs, TMDO_Type_Caster::from_db( $stored, $field ), 'round trip' );
+	}
+);

tests/live/suites/shadow_write.php

@@ -0,0 +1,96 @@
+<?php
+/**
+ * Suite: writes made in shadow_read must reach native meta.
+ *
+ * Bug (dev36, 2026-09-26): in shadow_read, update_metadata() fetches the old
+ * value through get_metadata_raw(); the Hook Bus has already upserted the new
+ * value and serves it from the flat table, so WP sees old === new and returns
+ * false without writing native meta. Demoting afterwards exposes stale data.
+ *
+ * @package WP_Data_Optimizer
+ */
+
+declare(strict_types=1);
+
+TMDO_Live::test(
+	'dual_write: user first_name update reaches native and flat (control)',
+	static function () {
+		TMDO_Live_Fixtures::field( 'user', 'first_name' );
+		TMDO_Live_Fixtures::use_modes( array( 'user' => 'dual_write' ) );
+		$uid = TMDO_Live_Fixtures::user();
+		update_user_meta( $uid, 'first_name', 'Before' );
+
+		$ret = update_user_meta( $uid, 'first_name', 'After' );
+
+		tmdo_live_assert_true( false !== $ret, 'update_user_meta returned false' );
+		tmdo_live_assert_same( array( 'After' ), TMDO_Live_Fixtures::native( 'user', $uid, 'first_name' ), 'native first_name' );
+		tmdo_live_assert_same( 'After', TMDO_Live_Fixtures::flat( 'user', $uid, 'first_name' ), 'flat first_name' );
+	}
+);
+
+TMDO_Live::test(
+	'shadow_read: user first_name update reaches native',
+	static function () {
+		TMDO_Live_Fixtures::field( 'user', 'first_name' );
+		TMDO_Live_Fixtures::use_modes( array( 'user' => 'dual_write' ) );
+		$uid = TMDO_Live_Fixtures::user();
+		update_user_meta( $uid, 'first_name', 'Before' );
+		TMDO_Live_Fixtures::use_modes( array( 'user' => 'shadow_read' ) );
+
+		$ret = update_user_meta( $uid, 'first_name', 'After' );
+
+		tmdo_live_assert_true( false !== $ret, 'update_user_meta returned false' );
+		tmdo_live_assert_same( array( 'After' ), TMDO_Live_Fixtures::native( 'user', $uid, 'first_name' ), 'native first_name' );
+	}
+);
+
+TMDO_Live::test(
+	'shadow_read → dual_write: value written in shadow_read survives demotion',
+	static function () {
+		TMDO_Live_Fixtures::field( 'user', 'last_name' );
+		TMDO_Live_Fixtures::use_modes( array( 'user' => 'dual_write' ) );
+		$uid = TMDO_Live_Fixtures::user();
+		update_user_meta( $uid, 'last_name', 'Before' );
+		TMDO_Live_Fixtures::use_modes( array( 'user' => 'shadow_read' ) );
+		update_user_meta( $uid, 'last_name', 'After' );
+
+		TMDO_Live_Fixtures::use_modes( array( 'user' => 'dual_write' ) );
+		wp_cache_delete( $uid, 'user_meta' );
+
+		tmdo_live_assert_same( 'After', get_user_meta( $uid, 'last_name', true ), 'last_name after demotion' );
+	}
+);
+
+TMDO_Live::test(
+	'shadow_read: HivePress term hp_icon update reaches native',
+	static function () {
+		TMDO_Live_Fixtures::field( 'term', 'hp_icon' );
+		TMDO_Live_Fixtures::use_modes( array( 'term' => 'dual_write' ) );
+		$tid = TMDO_Live_Fixtures::term( 'hp_listing_category' );
+		update_term_meta( $tid, 'hp_icon', 'star' );
+		TMDO_Live_Fixtures::use_modes( array( 'term' => 'shadow_read' ) );
+
+		$ret = update_term_meta( $tid, 'hp_icon', 'heart' );
+
+		tmdo_live_assert_true( false !== $ret, 'update_term_meta returned false' );
+		tmdo_live_assert_same( array( 'heart' ), TMDO_Live_Fixtures::native( 'term', $tid, 'hp_icon' ), 'native hp_icon' );
+	}
+);
+
+TMDO_Live::test(
+	'shadow_read: HivePress listing hp_rating_count (new int key) reaches native',
+	static function () {
+		TMDO_Live_Fixtures::field( 'post', 'hp_rating_count', 'hp_listing' );
+		TMDO_Live_Fixtures::use_modes( array( 'post' => 'dual_write' ) );
+		$lid = TMDO_Live_Fixtures::post( 'hp_listing' );
+		TMDO_Live_Fixtures::use_modes( array( 'post' => 'shadow_read' ) );
+
+		// HivePress writes the recomputed count as an int; the flat read cast it
+		// to the same int, so the old code skipped the native write.
+		$ret = update_post_meta( $lid, 'hp_rating_count', 1 );
+
+		tmdo_live_assert_true( false !== $ret, 'update_post_meta returned false' );
+		tmdo_live_assert_same( array( '1' ), TMDO_Live_Fixtures::native( 'post', $lid, 'hp_rating_count' ), 'native hp_rating_count' );
+		tmdo_live_assert_same( '1', TMDO_Live_Fixtures::flat( 'post', $lid, 'hp_rating_count', 'hp_listing' ), 'flat hp_rating_count' );
+	}
+);

tests/live/suites/zero_side_effect.php

@@ -0,0 +1,46 @@
+<?php
+/**
+ * Suite: zone tables that were never created are never queried.
+ *
+ * Bug (dev36, 2026-09-26): the HivePress AddOn registers cold fields, so every
+ * save_post / loop_start (PR-054) and every post delete (PR-054b) queried
+ * wp_wpdo_cold_{post_type} although the cold module was idle and the table
+ * did not exist ("table doesn't exist" DB errors on each write).
+ *
+ * @package WP_Data_Optimizer
+ */
+
+declare(strict_types=1);
+
+TMDO_Live::test(
+	'saving and deleting an hp_listing does not touch missing zone tables',
+	static function () {
+		global $wpdb;
+		$tables = array( TMDO_Zone_Cold::table( 'hp_listing' ), TMDO_Zone_Hot::table( 'hp_listing' ) );
+		foreach ( $tables as $table ) {
+			if ( TMDO_Schema_Manager::table_exists( $table ) ) {
+				throw new TMDO_Live_Skip( "{$table} exists on this site" );
+			}
+		}
+
+		$touched = array();
+		$spy     = static function ( $sql ) use ( $tables, &$touched ) {
+			foreach ( $tables as $table ) {
+				if ( false !== strpos( $sql, $table ) && 0 !== stripos( ltrim( $sql ), 'SHOW TABLES' ) ) {
+					$touched[] = $sql;
+				}
+			}
+			return $sql;
+		};
+		add_filter( 'query', $spy );
+		try {
+			$id = TMDO_Live_Fixtures::post( 'hp_listing' );
+			wp_update_post( array( 'ID' => $id, 'post_title' => 'tmdo-live-updated' ) );
+			wp_delete_post( $id, true );
+		} finally {
+			remove_filter( 'query', $spy );
+		}
+
+		tmdo_live_assert_same( array(), $touched, 'queries on missing zone tables' );
+	}
+);

tests/live/tools/checker.php

@@ -0,0 +1,46 @@
+<?php
+/**
+ * Independent native-meta vs flat-table consistency checker (does not use TMDO read paths).
+ * Usage: wp eval-file checker.php [entity]
+ * Per registered group/key: native rows, flat non-null, missing-in-flat, value mismatches, extra-in-flat.
+ */
+global $wpdb;
+$only  = $args[0] ?? '';
+$ids   = array( 'post' => 'post_id', 'user' => 'user_id', 'term' => 'term_id', 'comment' => 'comment_id' );
+$metas = array( 'post' => $wpdb->postmeta, 'user' => $wpdb->usermeta, 'term' => $wpdb->termmeta, 'comment' => $wpdb->commentmeta );
+$tot   = array( 'miss' => 0, 'diff' => 0, 'extra' => 0 );
+
+printf( "%-8s %-24s %-28s %8s %8s %6s %6s %6s\n", 'entity', 'group', 'key', 'native', 'flat', 'miss', 'diff', 'extra' );
+foreach ( $ids as $e => $idcol ) {
+	if ( $only && $only !== $e ) { continue; }
+	$mt  = $metas[ $e ];
+	$mid = ( 'user' === $e ) ? 'umeta_id' : 'meta_id';
+	foreach ( TMDO_Entity_Registry::get_groups_for_type( $e ) as $g ) {
+		$table = $wpdb->prefix . 'wpdo_' . $e . '_' . $g;
+		if ( ! $wpdb->get_var( $wpdb->prepare( 'SHOW TABLES LIKE %s', $table ) ) ) { continue; }
+		$scope     = ( 'post' === $e ) ? TMDO_Entity_Registry::get_group_post_types( $e, $g ) : array();
+		$scope_sql = $scope ? " AND m.post_id IN (SELECT ID FROM {$wpdb->posts} WHERE post_type IN ('" . implode( "','", array_map( 'esc_sql', $scope ) ) . "'))" : '';
+		foreach ( TMDO_Entity_Registry::get_group_keys( $e, $g ) as $key ) {
+			$col = preg_replace( '/[^a-zA-Z0-9_]/', '', $key );
+			// Latest native value per entity.
+			$nat      = $wpdb->prepare( "SELECT m.$idcol AS eid, m.meta_value AS v FROM $mt m JOIN (SELECT $idcol, MAX($mid) mid FROM $mt WHERE meta_key=%s GROUP BY $idcol) x ON x.mid=m.$mid WHERE 1=1 $scope_sql", $key );
+			$n_native = (int) $wpdb->get_var( "SELECT COUNT(*) FROM ($nat) n" );
+			$n_flat   = (int) $wpdb->get_var( "SELECT COUNT(*) FROM $table WHERE `$col` IS NOT NULL" );
+			$miss     = (int) $wpdb->get_var( "SELECT COUNT(*) FROM ($nat) n LEFT JOIN $table f ON f.$idcol=n.eid WHERE f.$idcol IS NULL OR (f.`$col` IS NULL AND n.v <> '')" );
+			// Value diff: numeric-aware loose compare.
+			$diff  = (int) $wpdb->get_var( "SELECT COUNT(*) FROM ($nat) n JOIN $table f ON f.$idcol=n.eid WHERE f.`$col` IS NOT NULL AND NOT (
+				CAST(f.`$col` AS CHAR) = n.v
+				OR (n.v REGEXP '^-?[0-9]+(\\\\.[0-9]+)?$' AND CAST(f.`$col` AS DECIMAL(30,6)) = CAST(n.v AS DECIMAL(30,6)))
+				OR (n.v='' AND CAST(f.`$col` AS CHAR) IN ('','0'))
+			)" );
+			$extra = (int) $wpdb->get_var( "SELECT COUNT(*) FROM $table f WHERE f.`$col` IS NOT NULL AND NOT EXISTS (SELECT 1 FROM $mt m WHERE m.$idcol=f.$idcol AND m.meta_key='" . esc_sql( $key ) . "')" );
+			if ( $n_native || $n_flat ) {
+				printf( "%-8s %-24s %-28s %8d %8d %6d %6d %6d\n", $e, $g, $key, $n_native, $n_flat, $miss, $diff, $extra );
+			}
+			$tot['miss']  += $miss;
+			$tot['diff']  += $diff;
+			$tot['extra'] += $extra;
+		}
+	}
+}
+printf( "TOTAL miss=%d diff=%d extra=%d\n", $tot['miss'], $tot['diff'], $tot['extra'] );

tests/live/tools/clone.sql

@@ -0,0 +1,12 @@
+-- Clone original hp_listing rows (ID < 20000) into copy k with ID offset k*20000.
+-- Bench-only: clones hp_listing rows into offset IDs. Never run on a production site.
+-- Usage: sed "s/__K__/<n>/" clone.sql | wp db query
+SET @k := __K__; SET @off := @k * 20000;
+INSERT INTO wp_posts (ID, post_author, post_date, post_date_gmt, post_content, post_title, post_excerpt, post_status, comment_status, ping_status, post_password, post_name, to_ping, pinged, post_modified, post_modified_gmt, post_content_filtered, post_parent, guid, menu_order, post_type, post_mime_type, comment_count)
+SELECT ID+@off, post_author, d, d, post_content, CONCAT(post_title,' c',@k), post_excerpt, post_status, comment_status, ping_status, post_password, CONCAT(post_name,'-c',@k), to_ping, pinged, d, d, post_content_filtered, post_parent, CONCAT(guid,'&c=',@k), menu_order, post_type, post_mime_type, comment_count
+FROM (SELECT *, DATE_SUB('2026-09-26 12:00:00', INTERVAL FLOOR(RAND()*63072000) SECOND) d FROM wp_posts WHERE post_type='hp_listing' AND ID < 20000) s;
+INSERT INTO wp_postmeta (post_id, meta_key, meta_value)
+SELECT m.post_id+@off, m.meta_key, CASE m.meta_key WHEN 'hp_price' THEN FLOOR(100+RAND()*49900) WHEN 'hp_hourly_rate' THEN FLOOR(10+RAND()*290) ELSE m.meta_value END
+FROM wp_postmeta m JOIN wp_posts p ON p.ID=m.post_id WHERE p.post_type='hp_listing' AND p.ID < 20000 AND m.meta_key NOT LIKE '\_transient%';
+INSERT INTO wp_term_relationships (object_id, term_taxonomy_id, term_order)
+SELECT r.object_id+@off, r.term_taxonomy_id, r.term_order FROM wp_term_relationships r JOIN wp_posts p ON p.ID=r.object_id WHERE p.post_type='hp_listing' AND p.ID < 20000;

tests/live/tools/fe.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+# usage: fe.sh <label>  — front-end HivePress/WC search probe, 5 runs each, median ms
+B="${TMDO_LIVE_URL:-https://dev36.2meet.pro}"
+URLS=(
+"/?post_type=hp_listing&s=&price[]=10000&price[]=20000"
+"/?post_type=hp_listing&s=&price[]=10000&price[]=20000&_sort=price__asc"
+"/?post_type=hp_listing&s=&hourly_rate[]=10&hourly_rate[]=50&_sort=hourly_rate__desc"
+"/?post_type=hp_listing&s=&_sort=rating__desc"
+"/?post_type=hp_listing&s=Taipei&price[]=1000&price[]=30000"
+"/?post_type=hp_vendor&s=&hourly_rate[]=100&hourly_rate[]=200"
+"/?post_type=hp_request&s="
+"/shop/?min_price=1000&max_price=5000"
+"/shop/?orderby=price-desc"
+)
+for u in "${URLS[@]}"; do
+  ms=(); for i in 1 2 3 4 5; do h=$(curl -s -o /dev/null -D - -H "X-S36-Probe: 1" "$B$u"); ms+=($(echo "$h" | grep -i x-s36-ms | awk "{print \$2}" | tr -dc 0-9)); done
+  med=$(printf "%s\n" "${ms[@]}" | sort -n | sed -n 3p)
+  echo "$u|$(echo "$h" | grep -i x-s36-found | awk "{print \$2}" | tr -dc 0-9)|$(echo "$h" | grep -i x-s36-ids | cut -d' ' -f2 | tr -d '\r')|$(echo "$h" | grep -i x-s36-queries | awk "{print \$2}" | tr -dc 0-9)|$med"
+done

tests/live/tools/mut.php

@@ -0,0 +1,62 @@
+<?php
+// Data-flow mutation test. Usage: wp eval-file mut.php <label>
+use HivePress\Models;
+add_filter( 'pre_http_request', function ( $r, $a, $u ) { return false !== strpos( $u, 'pixel.wp.com' ) ? array( 'headers' => array(), 'body' => '', 'response' => array( 'code' => 200, 'message' => 'OK' ), 'cookies' => array() ) : $r; }, 1, 3 );
+global $wpdb;
+$mode = TMDO_Mode_Manager::get( 'post' ) . '/' . TMDO_Mode_Manager::get( 'user' );
+function nat( $t, $id, $k ) { global $wpdb; $mt = $t === 'user' ? $wpdb->usermeta : $wpdb->postmeta; $c = $t === 'user' ? 'user_id' : 'post_id'; $v = $wpdb->get_col( $wpdb->prepare( "SELECT meta_value FROM $mt WHERE $c=%d AND meta_key=%s", $id, $k ) ); return $v ? implode( '|', $v ) : '∅'; }
+function flat( $t, $g, $id, $k ) { global $wpdb; $c = $t === 'user' ? 'user_id' : 'post_id'; $v = $wpdb->get_row( $wpdb->prepare( "SELECT `$k` v FROM {$wpdb->prefix}wpdo_{$t}_{$g} WHERE $c=%d", $id ) ); return $v ? ( $v->v ?? 'NULL' ) : 'NO-ROW'; }
+function row( $name, $vals ) { printf( "%-44s %s\n", $name, implode( '  ', array_map( fn( $k, $v ) => "$k=" . ( is_scalar( $v ) || is_null( $v ) ? var_export( $v, true ) : json_encode( $v ) ), array_keys( $vals ), $vals ) ) ); }
+// Never wp_cache_flush(): with Redis Object Cache selective flush it is one server-side scan that blocks Redis for every site.
+function clear_caches( $id ) { clean_post_cache( $id ); wp_cache_flush_runtime(); }
+echo "== mode post/user = $mode\n";
+
+// T1: HivePress model update of a listing price.
+$lid = (int) $wpdb->get_var( "SELECT ID FROM {$wpdb->posts} WHERE post_type='hp_listing' AND post_status='publish' ORDER BY ID DESC LIMIT 1" );
+$new = mt_rand( 60000, 69999 );
+update_post_meta( $lid, 'hp_price', $new ); // HP stores attributes via meta API
+clear_caches( $lid );
+$m = Models\Listing::query()->get_by_id( $lid );
+row( "T1 listing $lid hp_price:=$new", array( 'native' => nat( 'post', $lid, 'hp_price' ), 'flat' => flat( 'post', 'hp_listing_core', $lid, 'hp_price' ), 'get_meta' => get_post_meta( $lid, 'hp_price', true ), 'all_meta' => get_post_meta( $lid )['hp_price'][0] ?? '∅' ) );
+
+// T2: HivePress model field (verified) via model save.
+$m->set_verified( ! $m->is_verified() )->save( array( 'verified' ) );
+clear_caches( $lid );
+$m2 = Models\Listing::query()->get_by_id( $lid );
+row( "T2 listing verified via HP model", array( 'native' => nat( 'post', $lid, 'hp_verified' ), 'flat' => flat( 'post', 'hp_listing_core', $lid, 'hp_verified' ), 'hp_model' => $m2->is_verified(), 'get_meta' => get_post_meta( $lid, 'hp_verified', true ) ) );
+
+// T3: WC product price via CRUD.
+$pid = (int) $wpdb->get_var( "SELECT ID FROM {$wpdb->posts} WHERE post_type='product' AND post_title LIKE 'Product B1%' ORDER BY ID DESC LIMIT 1" );
+$p = wc_get_product( $pid ); $np = (string) mt_rand( 7000, 7999 ); $p->set_regular_price( $np ); $p->set_sale_price( '' ); $p->save();
+clear_caches( $pid );
+row( "T3 product $pid _regular_price:=$np", array( 'native' => nat( 'post', $pid, '_regular_price' ), 'flat' => flat( 'post', 'wc_product', $pid, '_regular_price' ), 'wc_read' => wc_get_product( $pid )->get_regular_price(), 'lookup' => $wpdb->get_var( "SELECT min_price FROM {$wpdb->prefix}wc_product_meta_lookup WHERE product_id=$pid" ) ) );
+
+// T4: order reduces stock (WC direct SQL path).
+$before = wc_get_product( $pid )->get_stock_quantity();
+$o = wc_create_order(); $o->add_product( wc_get_product( $pid ), 2 ); $o->calculate_totals( false ); $o->set_status( 'processing' ); $o->save(); wc_reduce_stock_levels( $o->get_id() );
+clear_caches( $pid );
+row( "T4 order x2 on product $pid (stock $before)", array( 'native' => nat( 'post', $pid, '_stock' ), 'flat' => flat( 'post', 'wc_product', $pid, '_stock' ), 'get_meta' => get_post_meta( $pid, '_stock', true ), 'wc_read' => wc_get_product( $pid )->get_stock_quantity(), 'sales_native' => nat( 'post', $pid, 'total_sales' ), 'sales_flat' => flat( 'post', 'wc_product', $pid, 'total_sales' ) ) );
+
+// T5: delete a meta key.
+update_post_meta( $lid, 'hp_featured', 1 ); delete_post_meta( $lid, 'hp_featured' ); clear_caches( $lid );
+row( "T5 delete_post_meta hp_featured", array( 'native' => nat( 'post', $lid, 'hp_featured' ), 'flat' => flat( 'post', 'hp_listing_core', $lid, 'hp_featured' ), 'get_meta' => var_export( get_post_meta( $lid, 'hp_featured', true ), true ), 'exists' => metadata_exists( 'post', $lid, 'hp_featured' ) ) );
+
+// T6: user first_name via wp_update_user.
+$uid = (int) $wpdb->get_var( "SELECT ID FROM {$wpdb->users} WHERE user_login LIKE 's36v_B1p1_%' ORDER BY ID LIMIT 1" );
+$fn = 'Fn' . mt_rand( 100, 999 ); wp_update_user( array( 'ID' => $uid, 'first_name' => $fn ) ); clean_user_cache( $uid ); wp_cache_flush_runtime();
+$u = get_userdata( $uid );
+row( "T6 user $uid first_name:=$fn", array( 'native' => nat( 'user', $uid, 'first_name' ), 'flat' => flat( 'user', 'core_profile', $uid, 'first_name' ), 'get_meta' => get_user_meta( $uid, 'first_name', true ), 'WP_User' => $u->first_name, 'wc_customer' => ( new WC_Customer( $uid ) )->get_first_name() ) );
+
+// T7: WC customer billing city via CRUD.
+$c = new WC_Customer( $uid ); $city = 'City' . mt_rand( 10, 99 ); $c->set_billing_city( $city ); $c->save(); clean_user_cache( $uid ); wp_cache_flush_runtime();
+row( "T7 WC_Customer billing_city:=$city", array( 'native' => nat( 'user', $uid, 'billing_city' ), 'flat' => flat( 'user', 'commerce', $uid, 'billing_city' ), 'get_meta' => get_user_meta( $uid, 'billing_city', true ), 'wc_customer' => ( new WC_Customer( $uid ) )->get_billing_city() ) );
+
+// T8: delete a listing → flat row?
+$d = (int) $wpdb->get_var( "SELECT ID FROM {$wpdb->posts} WHERE post_type='hp_listing' AND post_status='draft' ORDER BY ID DESC LIMIT 1" );
+wp_delete_post( $d, true );
+row( "T8 wp_delete_post $d", array( 'posts' => (int) $wpdb->get_var( "SELECT COUNT(*) FROM {$wpdb->posts} WHERE ID=$d" ), 'native_meta' => (int) $wpdb->get_var( "SELECT COUNT(*) FROM {$wpdb->postmeta} WHERE post_id=$d" ), 'flat_row' => flat( 'post', 'hp_listing_core', $d, 'post_id' ) ) );
+
+// T9: HP review → listing rating recompute.
+$before = get_post_meta( $lid, 'hp_rating_count', true );
+$rv = ( new Models\Review() )->fill( array( 'text' => 'mut', 'rating' => 5, 'approved' => 1, 'author' => $uid, 'author__display_name' => 'x', 'author__email' => 'x@example.test', 'listing' => $lid ) ); $rv->save(); clean_post_cache( $lid ); wp_cache_flush_runtime();
+row( "T9 add review (count was $before)", array( 'native' => nat( 'post', $lid, 'hp_rating_count' ), 'flat' => flat( 'post', 'hp_listing_core', $lid, 'hp_rating_count' ), 'hp_model' => Models\Listing::query()->get_by_id( $lid )->get_rating_count() ) );

tests/live/tools/qbench.php

@@ -0,0 +1,70 @@
+<?php
+/**
+ * Query correctness + latency harness. Runs identical WP_Query shapes and dumps
+ * ids / found_posts / timings to JSON so two runs (native vs routed mode) can be diffed.
+ * Usage: wp eval-file qbench.php <label> [iterations]
+ */
+global $wpdb;
+$label = $args[0] ?? 'run';
+$iters = (int) ( $args[1] ?? 5 );
+$out   = getcwd() . "/qbench_{$label}.json";
+
+// Deterministic parameters derived from data (same in every run).
+$vendor_ids = array_map( 'intval', $wpdb->get_col( "SELECT ID FROM {$wpdb->posts} WHERE post_type='hp_vendor' AND post_status='publish' ORDER BY ID LIMIT 3" ) );
+
+$L = array( 'post_type' => 'hp_listing', 'post_status' => 'publish', 'posts_per_page' => 20 );
+$cases = array(
+	'Q01 price BETWEEN (NUMERIC)'        => $L + array( 'meta_query' => array( array( 'key' => 'hp_price', 'value' => array( 10000, 20000 ), 'compare' => 'BETWEEN', 'type' => 'NUMERIC' ) ) ),
+	'Q02 price >= AND verified=1'        => $L + array( 'meta_query' => array( 'relation' => 'AND', array( 'key' => 'hp_price', 'value' => 25000, 'compare' => '>=', 'type' => 'NUMERIC' ), array( 'key' => 'hp_verified', 'value' => '1' ) ) ),
+	'Q03 rating >= 4.5 (DECIMAL)'        => $L + array( 'meta_query' => array( array( 'key' => 'hp_rating', 'value' => '4.5', 'compare' => '>=', 'type' => 'DECIMAL(10,2)' ) ) ),
+	'Q04 featured=1 OR verified=1'       => $L + array( 'meta_query' => array( 'relation' => 'OR', array( 'key' => 'hp_featured', 'value' => '1' ), array( 'key' => 'hp_verified', 'value' => '1' ) ) ),
+	'Q05 rate>=100 AND _thumbnail EXISTS'=> $L + array( 'meta_query' => array( array( 'key' => 'hp_hourly_rate', 'value' => 100, 'compare' => '>=', 'type' => 'NUMERIC' ), array( 'key' => '_thumbnail_id', 'compare' => 'EXISTS' ) ) ),
+	'Q06 product _sku LIKE'              => array( 'post_type' => 'product', 'post_status' => 'publish', 'posts_per_page' => 20, 'meta_query' => array( array( 'key' => '_sku', 'value' => 'S36-B1-1', 'compare' => 'LIKE' ) ) ),
+	'Q07 orderby meta_value_num price'   => $L + array( 'meta_key' => 'hp_price', 'orderby' => 'meta_value_num', 'order' => 'DESC' ),
+	'Q08 multi post_type + hp_budget'    => array( 'post_type' => array( 'hp_listing', 'hp_request' ), 'post_status' => 'publish', 'posts_per_page' => 20, 'meta_query' => array( array( 'key' => 'hp_budget', 'value' => 80000, 'compare' => '>=', 'type' => 'NUMERIC' ) ) ),
+	'Q09 featured NOT EXISTS'            => $L + array( 'meta_query' => array( array( 'key' => 'hp_featured', 'compare' => 'NOT EXISTS' ) ) ),
+	'Q10 rating_count != 1'              => $L + array( 'meta_query' => array( array( 'key' => 'hp_rating_count', 'value' => '1', 'compare' => '!=' ) ) ),
+	'Q11 product _price BETWEEN+instock' => array( 'post_type' => 'product', 'post_status' => 'publish', 'posts_per_page' => 20, 'meta_query' => array( array( 'key' => '_price', 'value' => array( 1000, 5000 ), 'compare' => 'BETWEEN', 'type' => 'NUMERIC' ), array( 'key' => '_stock_status', 'value' => 'instock' ) ) ),
+	'Q12 request budget > (NUMERIC)'     => array( 'post_type' => 'hp_request', 'post_status' => 'publish', 'posts_per_page' => 20, 'meta_query' => array( array( 'key' => 'hp_budget', 'value' => 50000, 'compare' => '>', 'type' => 'NUMERIC' ) ) ),
+	'Q13 rating_count IN (1,2)'          => $L + array( 'meta_query' => array( array( 'key' => 'hp_rating_count', 'value' => array( 1, 2 ), 'compare' => 'IN' ) ) ),
+	'Q16 price<1000 OR warranty=0 (mix)' => $L + array( 'meta_query' => array( 'relation' => 'OR', array( 'key' => 'hp_price', 'value' => 1000, 'compare' => '<', 'type' => 'NUMERIC' ), array( 'key' => 'hp_warranty', 'value' => '0' ) ) ),
+	'Q14 price > (CHAR, no type)'        => $L + array( 'meta_query' => array( array( 'key' => 'hp_price', 'value' => '9000', 'compare' => '>' ) ) ),
+	'Q15 hourly_rate < 50 orderby price' => $L + array( 'meta_query' => array( 'rate' => array( 'key' => 'hp_hourly_rate', 'value' => 50, 'compare' => '<', 'type' => 'NUMERIC' ), 'price' => array( 'key' => 'hp_price', 'type' => 'NUMERIC', 'compare' => 'EXISTS' ) ), 'orderby' => 'price', 'order' => 'ASC' ),
+);
+
+$res = array();
+foreach ( $cases as $name => $qa ) {
+	$times = array();
+	$ids   = null;
+	$found = null;
+	$err   = '';
+	$sql   = '';
+	for ( $i = 0; $i < $iters; $i++ ) {
+		// Fresh routed counts without wp_cache_flush_group() (a Redis-blocking server-side scan).
+		if ( method_exists( 'TMDO_Post_Query_Router', 'bump_count_version' ) ) {
+			TMDO_Post_Query_Router::bump_count_version();
+		} else {
+			wp_cache_set_last_changed( 'posts' ); // Core < 1.3.0 keyed the counts on posts' last_changed.
+		}
+		$wpdb->last_error = '';
+		$t = microtime( true );
+		$q = new WP_Query( $qa + array( 'fields' => 'ids', 'cache_results' => false, 'suppress_filters' => false ) );
+		$times[] = ( microtime( true ) - $t ) * 1000;
+		$ids     = array_map( 'intval', $q->posts );
+		$found   = (int) $q->found_posts;
+		$sql     = $q->request;
+		if ( $wpdb->last_error ) { $err = $wpdb->last_error; }
+	}
+	sort( $times );
+	$res[ $name ] = array(
+		'found' => $found,
+		'ids'   => $ids,
+		'p50'   => round( $times[ (int) floor( count( $times ) / 2 ) ], 2 ),
+		'max'   => round( max( $times ), 2 ),
+		'err'   => $err,
+		'sql'   => preg_replace( '/\s+/', ' ', $sql ),
+	);
+	printf( "%-36s found=%-6d p50=%8.2fms %s\n", $name, $found, $res[ $name ]['p50'], $err ? "ERR: $err" : '' );
+}
+file_put_contents( $out, wp_json_encode( array( 'mode' => TMDO_Mode_Manager::get( 'post' ), 'res' => $res ), JSON_PRETTY_PRINT ) );
+echo "saved $out (post mode=" . TMDO_Mode_Manager::get( 'post' ) . ")\n";

tests/live/tools/qdiff.php

@@ -0,0 +1,11 @@
+<?php
+// php qdiff.php a.json b.json — compare two qbench runs (a = native reference).
+$a = json_decode( file_get_contents( $argv[1] ), true ); $b = json_decode( file_get_contents( $argv[2] ), true );
+printf( "A=%s (%s)  B=%s (%s)\n", basename( $argv[1] ), $a['mode'], basename( $argv[2] ), $b['mode'] );
+printf( "%-36s %8s %8s %6s %6s %9s %9s %7s\n", 'case', 'foundA', 'foundB', 'set', 'order', 'p50A', 'p50B', 'speedup' );
+foreach ( $a['res'] as $k => $ra ) {
+	$rb = $b['res'][ $k ];
+	$set = ( array_diff( $ra['ids'], $rb['ids'] ) || array_diff( $rb['ids'], $ra['ids'] ) ) ? 'DIFF' : 'same';
+	$ord = $ra['ids'] === $rb['ids'] ? 'same' : 'DIFF';
+	printf( "%-36s %8d %8d %6s %6s %9.2f %9.2f %6.1fx %s\n", $k, $ra['found'], $rb['found'], $set, $ord, $ra['p50'], $rb['p50'], $rb['p50'] > 0 ? $ra['p50'] / $rb['p50'] : 0, $rb['err'] ? 'ERR:' . substr( $rb['err'], 0, 60 ) : '' );
+}

tests/live/tools/run_batch.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+# usage: run_batch.sh <batch-tag> <scale-divisor>
+S="$(cd "$(dirname "$0")" && pwd)/seed.php"
+cd "${TMDO_LIVE_WP_PATH:-/var/www/Studio/wp-local-dev36}"
+ B=$1; D=${2:-1}; OUT=${TMDO_LIVE_OUT:-/tmp}; LOG=$OUT/batch_$B.log
+run(){ wp eval-file $S "$@" 2>>$OUT/batch_${B}_err.log | grep SEED >> $LOG; }
+echo "== start $(date +%T)" >> $LOG
+run terms $((100/D)) ${B}
+for p in 1 2 3 4; do run vendors $((250/D)) ${B}p$p & done; wait
+for p in 1 2 3 4; do run listings $((1000/D)) ${B}p$p & done
+run requests $((500/D)) ${B} & run products $((1000/D)) ${B} & wait
+for p in 1 2; do run reviews $((2000/D)) ${B}p$p & done
+for p in 1 2; do run orders $((750/D)) ${B}p$p & done; wait
+echo "== end $(date +%T)" >> $LOG

tests/live/tools/seed.php

@@ -0,0 +1,158 @@
+<?php
+/**
+ * dev36 integration seeder — goes through the real APIs (HivePress models, WC CRUD,
+ * wp_insert_user / update_*_meta) so every write passes the Hook Bus exactly like prod.
+ *
+ * Usage: wp eval-file seed.php <kind> <count> [tag]
+ *   kind: vendors | listings | requests | reviews | products | orders | terms
+ */
+
+use HivePress\Models;
+
+add_filter( 'pre_wp_mail', '__return_true' );
+// WC Tracks pings pixel.wp.com ~3x per product save (~180 ms each); irrelevant to the test.
+add_filter( 'pre_http_request', function ( $r, $a, $url ) { return false !== strpos( $url, 'pixel.wp.com' ) ? array( 'headers' => array(), 'body' => '', 'response' => array( 'code' => 200, 'message' => 'OK' ), 'cookies' => array() ) : $r; }, 1, 3 );
+wp_defer_term_counting( true );
+wp_defer_comment_counting( true );
+
+$kind  = $args[0] ?? '';
+$count = (int) ( $args[1] ?? 0 );
+$tag   = $args[2] ?? 'b1';
+mt_srand( crc32( $kind . $tag ) );
+
+$cities = array( 'Taipei', 'Taichung', 'Kaohsiung', 'Tainan', 'Hsinchu', 'Keelung' );
+
+function s36_pick_ids( $post_type, $limit = 5000 ) {
+	global $wpdb;
+	return array_map( 'intval', $wpdb->get_col( $wpdb->prepare( "SELECT ID FROM {$wpdb->posts} WHERE post_type=%s AND post_status='publish' ORDER BY RAND() LIMIT %d", $post_type, $limit ) ) );
+}
+
+$t0 = microtime( true );
+$q0 = get_num_queries();
+$ok = 0;
+
+switch ( $kind ) {
+	case 'vendors':
+		for ( $i = 0; $i < $count; $i++ ) {
+			$login = "s36v_{$tag}_{$i}";
+			$uid   = wp_insert_user( array( 'user_login' => $login, 'user_email' => "$login@example.test", 'user_pass' => wp_generate_password(), 'role' => 'contributor', 'first_name' => "F$i", 'last_name' => "L$i", 'description' => "Vendor $i bio" ) );
+			if ( is_wp_error( $uid ) ) { continue; }
+			update_user_meta( $uid, 'billing_city', $cities[ $i % 6 ] );
+			update_user_meta( $uid, 'billing_phone', '09' . mt_rand( 10000000, 99999999 ) );
+			update_user_meta( $uid, 'facebook', "https://facebook.com/$login" );
+			update_user_meta( $uid, 'login_count', mt_rand( 1, 300 ) );
+			$v = ( new Models\Vendor() )->fill( array( 'name' => "Vendor $tag $i", 'description' => 'Seeded vendor', 'status' => 'publish', 'user' => $uid, 'verified' => (bool) mt_rand( 0, 1 ) ) );
+			if ( $v->save() ) {
+				update_post_meta( $v->get_id(), 'hp_hourly_rate', mt_rand( 10, 300 ) );
+				update_post_meta( $v->get_id(), 'hp_rating', mt_rand( 10, 50 ) / 10 );
+				$ok++;
+			}
+		}
+		break;
+
+	case 'listings':
+		global $wpdb;
+		$vendors = $wpdb->get_results( "SELECT ID, post_author FROM {$wpdb->posts} WHERE post_type='hp_vendor' AND post_status='publish'" );
+		$cats    = get_terms( array( 'taxonomy' => 'hp_listing_category', 'hide_empty' => false, 'fields' => 'ids' ) );
+		for ( $i = 0; $i < $count; $i++ ) {
+			$v = $vendors[ array_rand( $vendors ) ];
+			$l = ( new Models\Listing() )->fill( array(
+				'title'       => "Listing $tag $i " . $cities[ $i % 6 ],
+				'description' => str_repeat( 'Seeded listing body. ', 8 ),
+				'status'      => ( mt_rand( 1, 10 ) <= 9 ) ? 'publish' : 'draft',
+				'user'        => (int) $v->post_author,
+				'vendor'      => (int) $v->ID,
+				'featured'    => mt_rand( 1, 20 ) === 1,
+				'verified'    => mt_rand( 1, 3 ) === 1,
+				'categories'  => $cats ? array( $cats[ array_rand( $cats ) ] ) : array(),
+			) );
+			if ( $l->save() ) {
+				$id = $l->get_id();
+				update_post_meta( $id, 'hp_price', mt_rand( 100, 50000 ) );
+				update_post_meta( $id, 'hp_hourly_rate', mt_rand( 10, 300 ) );
+				update_post_meta( $id, 'hp_warranty', mt_rand( 0, 24 ) );
+				$ok++;
+			}
+		}
+		break;
+
+	case 'requests':
+		$users = get_users( array( 'fields' => 'ID', 'number' => 3000, 'orderby' => 'rand' ) );
+		for ( $i = 0; $i < $count; $i++ ) {
+			$r = ( new Models\Request() )->fill( array( 'title' => "Request $tag $i", 'description' => 'Need help', 'status' => 'publish', 'user' => (int) $users[ array_rand( $users ) ] ) );
+			if ( $r->save() ) {
+				update_post_meta( $r->get_id(), 'hp_budget', mt_rand( 500, 90000 ) );
+				update_post_meta( $r->get_id(), 'hp_due_date', gmdate( 'Y-m-d', time() + mt_rand( 1, 90 ) * DAY_IN_SECONDS ) );
+				$ok++;
+			}
+		}
+		break;
+
+	case 'reviews':
+		$listings = s36_pick_ids( 'hp_listing' );
+		$users    = get_users( array( 'fields' => array( 'ID', 'display_name', 'user_email' ), 'number' => 3000, 'orderby' => 'rand' ) );
+		for ( $i = 0; $i < $count; $i++ ) {
+			$u  = $users[ array_rand( $users ) ];
+			$rv = ( new Models\Review() )->fill( array( 'text' => "Review $tag $i", 'rating' => mt_rand( 1, 5 ), 'approved' => 1, 'author' => (int) $u->ID, 'author__display_name' => $u->display_name, 'author__email' => $u->user_email, 'listing' => $listings[ array_rand( $listings ) ] ) );
+			if ( $rv->save() ) { $ok++; }
+		}
+		break;
+
+	case 'terms':
+		for ( $i = 0; $i < $count; $i++ ) {
+			$t = wp_insert_term( "Cat $tag $i", 'hp_listing_category' );
+			if ( ! is_wp_error( $t ) ) {
+				update_term_meta( $t['term_id'], 'hp_sort_order', $i );
+				update_term_meta( $t['term_id'], 'hp_icon', 'star' );
+				$ok++;
+			}
+		}
+		break;
+
+	case 'products':
+		$pcats = get_terms( array( 'taxonomy' => 'product_cat', 'hide_empty' => false, 'fields' => 'ids' ) );
+		for ( $i = 0; $i < $count; $i++ ) {
+			$p = new WC_Product_Simple();
+			$p->set_name( "Product $tag $i" );
+			$p->set_status( 'publish' );
+			$reg = mt_rand( 100, 20000 );
+			$p->set_regular_price( (string) $reg );
+			if ( mt_rand( 1, 4 ) === 1 ) { $p->set_sale_price( (string) (int) ( $reg * 0.8 ) ); }
+			$p->set_sku( "S36-$tag-$i" );
+			$p->set_manage_stock( true );
+			$p->set_stock_quantity( mt_rand( 0, 500 ) );
+			if ( $pcats ) { $p->set_category_ids( array( $pcats[ array_rand( $pcats ) ] ) ); }
+			if ( $p->save() ) { $ok++; }
+		}
+		break;
+
+	case 'orders':
+		$products = wc_get_products( array( 'limit' => 2000, 'status' => 'publish', 'orderby' => 'rand', 'return' => 'ids' ) );
+		$users    = get_users( array( 'fields' => 'ID', 'number' => 3000, 'orderby' => 'rand' ) );
+		$statuses = array( 'completed', 'completed', 'processing', 'on-hold', 'cancelled', 'refunded' );
+		for ( $i = 0; $i < $count; $i++ ) {
+			$o = wc_create_order( array( 'customer_id' => (int) $users[ array_rand( $users ) ] ) );
+			if ( is_wp_error( $o ) ) { continue; }
+			$n = mt_rand( 1, 3 );
+			for ( $j = 0; $j < $n; $j++ ) { $o->add_product( wc_get_product( $products[ array_rand( $products ) ] ), mt_rand( 1, 3 ) ); }
+			$o->set_billing_city( $cities[ $i % 6 ] );
+			$o->set_billing_email( "buyer$i@example.test" );
+			$o->calculate_totals( false );
+			$o->set_status( $statuses[ array_rand( $statuses ) ] );
+			$o->save();
+			$ok++;
+		}
+		break;
+
+	default:
+		WP_CLI::error( "unknown kind $kind" );
+}
+
+wp_defer_term_counting( false );
+wp_defer_comment_counting( false );
+
+$el = microtime( true ) - $t0;
+$q  = get_num_queries() - $q0;
+WP_CLI::log( sprintf( 'SEED %s x%d ok=%d  %.1fs  %.2f ms/item  %.1f queries/item  mode(post=%s,user=%s,term=%s,comment=%s)',
+	$kind, $count, $ok, $el, $ok ? $el * 1000 / $ok : 0, $ok ? $q / $ok : 0,
+	...( class_exists( 'TMDO_Mode_Manager' ) ? array( TMDO_Mode_Manager::get( 'post' ), TMDO_Mode_Manager::get( 'user' ), TMDO_Mode_Manager::get( 'term' ), TMDO_Mode_Manager::get( 'comment' ) ) : array( 'NO-TMDO', '-', '-', '-' ) ) ) );

tests/live/tools/zz-s36-probe.php

@@ -0,0 +1,22 @@
+<?php
+/**
+ * TEMPORARY test probe for the 2meet-DO integration test (2026-09-26). Delete after testing.
+ * Only active when the request carries header "X-S36-Probe: 1".
+ */
+if ( empty( $_SERVER['HTTP_X_S36_PROBE'] ) ) {
+	return;
+}
+add_action(
+	'template_redirect',
+	function () {
+		global $wp_query, $wpdb;
+		$ids = wp_list_pluck( (array) $wp_query->posts, 'ID' );
+		header( 'X-S36-Found: ' . (int) $wp_query->found_posts );
+		header( 'X-S36-Ids: ' . implode( ',', array_map( 'intval', $ids ) ) );
+		header( 'X-S36-Queries: ' . (int) $wpdb->num_queries );
+		header( 'X-S36-Routed: ' . ( false !== strpos( (string) $wp_query->request, 'wpdo' ) ? 1 : 0 ) );
+		header( 'X-S36-Sql: ' . substr( preg_replace( '/\s+/', ' ', (string) $wp_query->request ), 0, 1500 ) );
+		header( 'X-S36-Ms: ' . round( ( microtime( true ) - $_SERVER['REQUEST_TIME_FLOAT'] ) * 1000 ) );
+	},
+	0
+);

tests/unit/AutoPromoterDriftTest.php

@@ -0,0 +1,78 @@
+<?php
+declare(strict_types=1);
+
+use PHPUnit\Framework\TestCase;
+
+/**
+ * TMDO_Auto_Promoter promotes shadow_read → aeav_only only when the last drift
+ * check of every group of the entity found nothing, within the last two days
+ * (2.2 PR-075; decision 2026-09-27). No record means no promotion.
+ */
+class AutoPromoterDriftTest extends TestCase {
+
+	private const TEN_DAYS_AGO = 864000;
+
+	public static function setUpBeforeClass(): void {
+		require_once TMDO_PATH . 'includes/engine/class-tmdo-auto-promoter.php';
+	}
+
+	protected function setUp(): void {
+		ini_set( 'error_log', '/dev/null' );
+		$GLOBALS['_wp_options']          = array( 'wpdo_bridge_modes' => array( 'user' => 'shadow_read' ) );
+		$GLOBALS['_wp_filter_callbacks'] = array();
+		$GLOBALS['_wp_current_user_can'] = array( 'manage_options' => true );
+		TMDO_Mode_Manager::reset_cache();
+		TMDO_Entity_Registry::init();
+		TMDO_Entity_Registry::register_adapter( 'user', new TMDO_Adapter_User() );
+		TMDO_Entity_Registry::register_group( 'user', 'ap_one', array( array( 'key' => 'ap_a', 'type' => 'text' ) ) );
+		TMDO_Entity_Registry::register_group( 'user', 'ap_two', array( array( 'key' => 'ap_b', 'type' => 'text' ) ) );
+	}
+
+	protected function tearDown(): void {
+		TMDO_Entity_Registry::init();
+		TMDO_Mode_Manager::reset_cache();
+	}
+
+	private function drift( string $group, int $diff, int $age = 0 ): void {
+		$GLOBALS['_wp_options'][ TMDO_Drift_Check::OPTION ]['user'][ $group ] = array(
+			'miss'       => 0,
+			'diff'       => $diff,
+			'extra'      => 0,
+			'sample'     => TMDO_Drift_Check::CRON_SAMPLE,
+			'checked_at' => gmdate( 'Y-m-d H:i:s', time() - $age ),
+		);
+	}
+
+	private function check(): string {
+		return TMDO_Auto_Promoter::check_entity( 'user', 7, array( 'user' => time() - self::TEN_DAYS_AGO ) );
+	}
+
+	public function test_promotes_when_every_group_checked_clean_recently(): void {
+		$this->drift( 'ap_one', 0 );
+		$this->drift( 'ap_two', 0 );
+
+		$this->assertSame( 'promoted', $this->check() );
+		$this->assertSame( 'aeav_only', TMDO_Mode_Manager::get( 'user' ) );
+	}
+
+	public function test_drift_in_one_group_blocks_promotion(): void {
+		$this->drift( 'ap_one', 0 );
+		$this->drift( 'ap_two', 1 );
+
+		$this->assertSame( 'drift_not_clean', $this->check() );
+		$this->assertSame( 'shadow_read', TMDO_Mode_Manager::get( 'user' ) );
+	}
+
+	public function test_a_group_never_checked_blocks_promotion(): void {
+		$this->drift( 'ap_one', 0 );
+
+		$this->assertSame( 'drift_not_clean', $this->check() );
+	}
+
+	public function test_a_check_older_than_two_days_blocks_promotion(): void {
+		$this->drift( 'ap_one', 0 );
+		$this->drift( 'ap_two', 0, 3 * DAY_IN_SECONDS );
+
+		$this->assertSame( 'drift_not_clean', $this->check() );
+	}
+}

tests/unit/CacheLayerTest.php

@@ -11,17 +11,35 @@ class CacheLayerTest extends TestCase {
 	/** Rows returned by get_results() for the bulk-fetch query. */
 	public static array $db_rows = [];
 
+	/** Whether SHOW TABLES reports the cold table. */
+	public static bool $table_exists = true;
+
+	/** Queries that read the cold table (get_var / get_results on it). */
+	public static int $cold_queries = 0;
+
 	protected function setUp(): void {
 		self::$db_rows        = [];
+		self::$table_exists   = true;
+		self::$cold_queries   = 0;
 		$GLOBALS['_wp_cache'] = [];
 
 		// Reset Schema Registry singleton.
 		$ref = new ReflectionClass( WPDO_Schema_Registry::class );
 		$ref->getProperty( 'instance' )->setValue( null, null );
 
+		// The cold module is write-active unless a test says otherwise.
+		$this->set_cold_module( 'dual_write' );
+		WPDO_Schema_Manager::flush_table_exists_cache();
+
 		$this->setup_wpdb_mock();
 	}
 
+	private function set_cold_module( string $state ): void {
+		$GLOBALS['_wp_options']['wpdo_features'] = array( 'cold_hp_listing' => $state );
+		$prop = new ReflectionProperty( WPDO_Feature_Flags::class, 'cache' );
+		$prop->setValue( null, null );
+	}
+
 	private function setup_wpdb_mock(): void {
 		global $wpdb;
 
@@ -36,7 +54,15 @@ class CacheLayerTest extends TestCase {
 				}, $sql );
 			}
 
-			public function get_var( string $sql ): ?string { return null; }
+			public function get_var( string $sql ): ?string {
+				if ( preg_match( "/^SHOW TABLES LIKE '(.+)'$/", $sql, $m ) ) {
+					return CacheLayerTest::$table_exists ? stripslashes( $m[1] ) : null;
+				}
+				if ( str_contains( $sql, 'wpdo_cold_' ) ) {
+					++CacheLayerTest::$cold_queries;
+				}
+				return null;
+			}
 			public function get_row( string $sql, $output = OBJECT ) { return null; }
 			public function insert( string $table, array $data, $format = null ): int|false { return 1; }
 			public function update( string $table, array $data, array $where, $f = null, $wf = null ): int|false { return 1; }
@@ -44,11 +70,45 @@ class CacheLayerTest extends TestCase {
 			public function query( string $sql ): int|bool { return 1; }
 
 			public function get_results( string $sql, $output = OBJECT ): array {
+				if ( str_contains( $sql, 'wpdo_cold_' ) ) {
+					++CacheLayerTest::$cold_queries;
+				}
 				return CacheLayerTest::$db_rows;
 			}
 		};
 	}
 
+	// ── Zero side effect while the cold module is not active ─────────────────
+
+	public function test_prefetch_does_not_query_while_module_idle(): void {
+		$this->register_cold_field();
+		$this->set_cold_module( 'idle' );
+
+		WPDO_Cache_Layer::prefetch( [ 1, 2 ], 'hp_listing' );
+
+		$this->assertSame( 0, self::$cold_queries );
+		$this->assertEmpty( $GLOBALS['_wp_cache'] );
+	}
+
+	public function test_warm_post_does_not_query_while_module_idle(): void {
+		$this->register_cold_field();
+		$this->set_cold_module( 'idle' );
+
+		WPDO_Cache_Layer::warm_post( 20, 'hp_listing' );
+
+		$this->assertSame( 0, self::$cold_queries );
+	}
+
+	public function test_no_query_when_cold_table_is_missing(): void {
+		$this->register_cold_field();
+		self::$table_exists = false;
+
+		WPDO_Cache_Layer::prefetch( [ 1 ], 'hp_listing' );
+		WPDO_Cache_Layer::warm_post( 1, 'hp_listing' );
+
+		$this->assertSame( 0, self::$cold_queries );
+	}
+
 	// ── Helper: register cold field ──────────────────────────────────────────
 
 	private function register_cold_field( string $post_type = 'hp_listing', string $meta_key = 'hp_description' ): void {
@@ -137,6 +197,25 @@ class CacheLayerTest extends TestCase {
 		$this->assertNotSame( [ 'stale' => true ], $GLOBALS['_wp_cache'][ $group ][ $cache_key ] ?? null );
 	}
 
+	/**
+	 * Flushing bumps the post type's cache version instead of asking the
+	 * object cache to scan the group (a server-side script on Redis that
+	 * blocks it on a large group); older entries expire by their TTL.
+	 */
+	public function test_flush_group_moves_to_new_keys_without_a_group_flush(): void {
+		$group                                   = 'wpdo_cold_hp_listing';
+		$old_key                                 = WPDO_Zone_Cold::cache_key( 1, 'hp_listing' );
+		$GLOBALS['_wp_cache'][ $group ][ $old_key ] = array( 'stale' => true );
+
+		WPDO_Cache_Layer::flush_group( 'hp_listing' );
+
+		$new_key = WPDO_Zone_Cold::cache_key( 1, 'hp_listing' );
+		$this->assertNotSame( $old_key, $new_key );
+		$this->assertFalse( wp_cache_get( $new_key, $group ) );
+		$this->assertSame( 'cold_2', WPDO_Zone_Cold::cache_key( 2, 'other_type' ), 'other post types keep their keys' );
+		$this->assertArrayHasKey( $old_key, $GLOBALS['_wp_cache'][ $group ], 'nothing scanned or deleted' );
+	}
+
 	// ── get_stats() ──────────────────────────────────────────────────────────
 
 	public function test_get_stats_includes_required_keys(): void {

tests/unit/CliBridgeModeTest.php

@@ -0,0 +1,57 @@
+<?php
+declare(strict_types=1);
+
+use PHPUnit\Framework\TestCase;
+
+/**
+ * `wp tmdo bridge-mode <entity> <mode>` (2.2 PR-069): the CLI way to change an
+ * entity's bridge mode. It must go through TMDO_Mode_Manager::set(), so unsafe
+ * jumps and promotions refused by the Promotion Guard never reach the option.
+ * (The Guard matrix itself is covered by PromotionGuardTest.)
+ */
+class CliBridgeModeTest extends TestCase {
+
+	protected function setUp(): void {
+		ini_set( 'error_log', '/dev/null' );
+		$GLOBALS['_wp_options']          = array();
+		$GLOBALS['_wp_filter_callbacks'] = array();
+		$GLOBALS['_wp_current_user_can'] = array( 'manage_options' => true );
+		TMDO_Mode_Manager::reset_cache();
+	}
+
+	private function modes( array $modes ): void {
+		$GLOBALS['_wp_options']['wpdo_bridge_modes'] = $modes;
+		TMDO_Mode_Manager::reset_cache();
+	}
+
+	public function test_sets_the_mode_of_one_entity(): void {
+		$this->modes( array( 'user' => 'disabled', 'post' => 'dual_write' ) );
+
+		( new TMDO_CLI_V2() )->bridge_mode( array( 'user', 'dual_write' ), array() );
+
+		$this->assertSame( 'dual_write', TMDO_Mode_Manager::get( 'user' ) );
+		$this->assertSame( 'dual_write', TMDO_Mode_Manager::get( 'post' ), 'other entities untouched' );
+	}
+
+	public function test_an_unsafe_jump_is_refused(): void {
+		$this->modes( array( 'user' => 'disabled' ) );
+
+		( new TMDO_CLI_V2() )->bridge_mode( array( 'user', 'aeav_only' ), array() );
+
+		$this->assertSame( 'disabled', TMDO_Mode_Manager::get( 'user' ) );
+	}
+
+	/**
+	 * @runInSeparateProcess
+	 * @preserveGlobalState disabled
+	 */
+	public function test_a_promotion_refused_by_the_guard_leaves_the_mode_unchanged(): void {
+		eval( 'namespace HivePress; class Core {}' );
+		$this->modes( array( 'user' => 'shadow_read' ) );
+
+		( new TMDO_CLI_V2() )->bridge_mode( array( 'user', 'aeav_only' ), array() );
+
+		$this->assertSame( 'shadow_read', TMDO_Mode_Manager::get( 'user' ) );
+		$this->assertSame( array( 'user' => 'shadow_read' ), $GLOBALS['_wp_options']['wpdo_bridge_modes'] );
+	}
+}

tests/unit/CliFilterStatusTest.php

@@ -0,0 +1,41 @@
+<?php
+declare(strict_types=1);
+
+use PHPUnit\Framework\TestCase;
+
+/**
+ * `wp tmdo term-comment-diagnose` filter chain status (2.2 PR-076).
+ *
+ * It read each filter's option with a default of '1', while the garbage filter
+ * and misc bucket default to off: a site that never touched them was told they
+ * were enabled. The status now comes from each filter's own is_enabled().
+ */
+class CliFilterStatusTest extends TestCase {
+
+	protected function setUp(): void {
+		$GLOBALS['_wp_options']    = array();
+		$GLOBALS['_wp_cli_output'] = array();
+	}
+
+	private function filter_line( string $class, string $label ): string {
+		$method = new ReflectionMethod( TMDO_CLI_Term_Comment::class, 'print_filter_status' );
+		$method->setAccessible( true );
+		$method->invoke( null, $class, $label );
+		return (string) end( $GLOBALS['_wp_cli_output'] );
+	}
+
+	public function test_filters_off_by_default_show_disabled(): void {
+		$this->assertStringContainsString( 'disabled', $this->filter_line( 'TMDO_Term_Comment_Garbage_Filter', 'Garbage filter' ) );
+		$this->assertStringContainsString( 'disabled', $this->filter_line( 'TMDO_Term_Comment_Misc_Bucket', 'Misc bucket' ) );
+	}
+
+	public function test_an_enabled_filter_shows_enabled(): void {
+		$GLOBALS['_wp_options'][ TMDO_Term_Comment_Garbage_Filter::OPT_ENABLED ] = '1';
+
+		$this->assertStringContainsString( '✓ enabled', $this->filter_line( 'TMDO_Term_Comment_Garbage_Filter', 'Garbage filter' ) );
+	}
+
+	public function test_a_filter_whose_add_on_is_not_active_says_so(): void {
+		$this->assertStringContainsString( 'not installed', $this->filter_line( 'TMDO_No_Such_Filter', 'WC term count filter' ) );
+	}
+}

tests/unit/EntityRegistryIndexesTest.php

@@ -14,7 +14,9 @@ class EntityRegistryIndexesTest extends TestCase {
 
 	protected function setUp(): void {
 		TMDO_Entity_Registry::init();
-		TMDO_Entity_Registry::register_adapter( 'post', $this->createMock( TMDO_Entity_Adapter_Interface::class ) );
+		$adapter = $this->createMock( TMDO_Entity_Adapter_Interface::class );
+		$adapter->method( 'get_entity_id_column' )->willReturn( 'post_id' );
+		TMDO_Entity_Registry::register_adapter( 'post', $adapter );
 	}
 
 	private function fields(): array {
@@ -37,6 +39,16 @@ class EntityRegistryIndexesTest extends TestCase {
 		$this->assertSame( array( 'ok' => array( 'x_price' ) ), TMDO_Entity_Registry::get_group_indexes( 'post', 'x_core' ) );
 	}
 
+	/**
+	 * A sort index ends with the entity ID, so a flat-first search ordered by a
+	 * column with the ID tie-break reads the index in order (2.4 PR-118).
+	 */
+	public function test_an_index_may_end_with_the_entity_id_column(): void {
+		TMDO_Entity_Registry::register_group( 'post', 'x_core', $this->fields(), array( 'indexes' => array( 'price_id' => array( 'x_price', 'post_id' ), 'id_first' => array( 'post_id', 'x_price' ) ) ) );
+
+		$this->assertSame( array( 'price_id' => array( 'x_price', 'post_id' ) ), TMDO_Entity_Registry::get_group_indexes( 'post', 'x_core' ), 'the ID only as the last column' );
+	}
+
 	public function test_indexes_leave_the_field_definition_and_hash_alone(): void {
 		TMDO_Entity_Registry::register_group( 'post', 'plain', $this->fields() );
 		TMDO_Entity_Registry::register_group( 'post', 'indexed', $this->fields(), array( 'indexes' => array( 'flag_price' => array( 'x_flag', 'x_price' ) ) ) );

tests/unit/LoggerTest.php

@@ -130,4 +130,41 @@ class LoggerTest extends TestCase {
 		$deleted = WPDO_Logger::purge( 30 );
 		$this->assertSame( 5, $deleted );
 	}
+
+	/** error_log() output of $fn. */
+	private function logged( callable $fn ): string {
+		$file = tempnam( sys_get_temp_dir(), 'tmdo-log' );
+		$old  = ini_set( 'error_log', $file );
+		try {
+			$fn();
+		} finally {
+			ini_set( 'error_log', (string) $old );
+		}
+		$out = (string) file_get_contents( $file );
+		unlink( $file );
+		return $out;
+	}
+
+	public function test_info_stays_out_of_the_log_unless_debug_logging_is_on(): void {
+		$GLOBALS['_wp_filter_callbacks']['tmdo_log_info'] = array();
+
+		$this->assertSame( '', $this->logged( static fn() => WPDO_Logger::info( 'cache_flushed' ) ) );
+
+		add_filter( 'tmdo_log_info', static fn() => true );
+		try {
+			$this->assertStringContainsString( '[WPDO][INFO][cache_flushed]', $this->logged( static fn() => WPDO_Logger::info( 'cache_flushed' ) ) );
+		} finally {
+			$GLOBALS['_wp_filter_callbacks']['tmdo_log_info'] = array();
+		}
+	}
+
+	public function test_notices_are_always_logged_for_the_audit_trail(): void {
+		$GLOBALS['_wp_filter_callbacks']['tmdo_log_info'] = array();
+
+		$this->assertStringContainsString( '[WPDO][NOTICE][bridge_mode_changed]', $this->logged( static fn() => WPDO_Logger::notice( 'bridge_mode_changed', array( 'to' => 'dual_write' ) ) ) );
+	}
+
+	public function test_warnings_are_always_logged(): void {
+		$this->assertStringContainsString( '[WPDO][WARN][odd_return]', $this->logged( static fn() => WPDO_Logger::warning( 'odd_return' ) ) );
+	}
 }

tests/unit/PostFields/PostFieldsRegistrationTest.php

@@ -33,13 +33,12 @@ class PostFieldsRegistrationTest extends TestCase {
 		$this->assertTrue( true );
 	}
 
-	public function test_all_four_groups_are_registered(): void {
+	public function test_the_core_groups_are_registered(): void {
 		WPDO_Post_Fields::register_entity_fields();
 
 		$expected = array(
 			'wp_core',
 			'attachment',
-			'wc_product',
 			'nav_menu_item',
 		);
 
@@ -92,38 +91,14 @@ class PostFieldsRegistrationTest extends TestCase {
 		$this->assertSame( 'json', $field['type'] );
 	}
 
-	// ── wc_product group ─────────────────────────────────────────────────────
+	// ── WooCommerce products stay in native meta (2.2 PR-077) ───────────────
 
-	public function test_wc_product_group_has_19_keys(): void {
+	public function test_core_registers_no_woocommerce_product_group(): void {
 		WPDO_Post_Fields::register_entity_fields();
-		$keys = $this->get_field_keys( 'wc_product' );
-		$this->assertCount( 19, $keys, 'wc_product group should register exactly 19 keys.' );
-	}
 
-	public function test_wc_product_critical_keys_present(): void {
-		WPDO_Post_Fields::register_entity_fields();
-		$keys = $this->get_field_keys( 'wc_product' );
-		foreach ( array( '_price', '_regular_price', '_sale_price', '_stock', '_stock_status', '_sku' ) as $key ) {
-			$this->assertContains( $key, $keys, "wc_product missing critical key: {$key}" );
-		}
-	}
-
-	public function test_wc_product_price_is_searchable_decimal(): void {
-		WPDO_Post_Fields::register_entity_fields();
-		$field = $this->find_field( 'wc_product', '_price' );
-		$this->assertNotNull( $field );
-		$this->assertSame( 'decimal', $field['type'] );
-		$this->assertTrue( (bool) ( $field['searchable'] ?? false ) );
-	}
-
-	public function test_wc_product_stock_status_is_enum_searchable(): void {
-		WPDO_Post_Fields::register_entity_fields();
-		$field = $this->find_field( 'wc_product', '_stock_status' );
-		$this->assertNotNull( $field );
-		$this->assertSame( 'enum', $field['type'] );
-		$this->assertTrue( (bool) ( $field['searchable'] ?? false ) );
-		$this->assertContains( 'instock', $field['options'] );
-		$this->assertContains( 'outofstock', $field['options'] );
+		$this->assertSame( array(), WPDO_Entity_Registry::get_group_fields( 'post', 'wc_product' ), 'WooCommerce reads and writes product meta directly (stock by SQL)' );
+		$this->assertNull( WPDO_Entity_Registry::get_field( 'post', '_price', 'product' ) );
+		$this->assertSame( array(), WPDO_Post_Fields::groups_for_post_type( 'product' ) );
 	}
 
 	// ── HivePress groups moved to the HivePress AddOn ───────────────────────
@@ -139,7 +114,6 @@ class PostFieldsRegistrationTest extends TestCase {
 
 	public function test_core_groups_map_to_their_post_types(): void {
 		$this->assertSame( 'attachment', WPDO_Post_Fields::post_type_for_group( 'attachment' ) );
-		$this->assertSame( 'product', WPDO_Post_Fields::post_type_for_group( 'wc_product' ) );
 		$this->assertSame( 'nav_menu_item', WPDO_Post_Fields::post_type_for_group( 'nav_menu_item' ) );
 		$this->assertNull( WPDO_Post_Fields::post_type_for_group( 'wp_core' ), 'wp_core spans every post type' );
 	}
@@ -149,7 +123,6 @@ class PostFieldsRegistrationTest extends TestCase {
 
 		$this->assertSame( 'x_type', WPDO_Post_Fields::post_type_for_group( 'x_core' ) );
 		$this->assertSame( array( 'x_core' ), WPDO_Post_Fields::groups_for_post_type( 'x_type' ) );
-		$this->assertSame( array( 'wc_product' ), WPDO_Post_Fields::groups_for_post_type( 'product' ) );
 		$this->assertNull( WPDO_Post_Fields::post_type_for_group( 'hp_listing_core' ), 'unregistered HivePress group is unknown to core' );
 	}