diff --git a/includes/class-tmdo-hivepress-entity-groups.php b/includes/class-tmdo-hivepress-entity-groups.php
index 798fba3..2894502 100644
--- a/includes/class-tmdo-hivepress-entity-groups.php
+++ b/includes/class-tmdo-hivepress-entity-groups.php
@@ -8,6 +8,14 @@
  *   post:hp_vendor_core  → wp_wpdo_post_hp_vendor_core  (hp_vendor)
  *   user:hp_user         → wp_wpdo_user_hp_user
  *
+ * Fields only the Hot zone used to cover (ADR-003), as their own groups:
+ *   post:hp_draft_flags          (hp_listing, hp_request)
+ *   post:hp_booking_core         (hp_booking)
+ *   post:hp_membership_plan_core (hp_membership_plan)
+ *   post:hp_membership_core      (hp_membership)
+ * They register FIRST so the legacy last-registered owner of hp_expired_time
+ * stays hp_request_core.
+ *
  * The term/comment groups (hp_taxonomy, hp_review) live in
  * TMDO_Hivepress_Term_Comment_Fields.
  *
@@ -60,6 +68,10 @@ final class TMDO_HivePress_Entity_Groups {
 			return;
 		}
 
+		self::register_hp_draft_flags_group();
+		self::register_hp_booking_core_group();
+		self::register_hp_membership_plan_core_group();
+		self::register_hp_membership_core_group();
 		self::register_hp_listing_core_group();
 		self::register_hp_request_core_group();
 		self::register_hp_vendor_core_group();
@@ -68,6 +80,106 @@ final class TMDO_HivePress_Entity_Groups {
 
 	// ── Group definitions ────────────────────────────────────────────────────
 
+	/**
+	 * Draft flag shared by listings and requests (user-dashboard filtering).
+	 *
+	 * @return void
+	 */
+	private static function register_hp_draft_flags_group(): void {
+		TMDO_Entity_Registry::register_group(
+			'post',
+			'hp_draft_flags',
+			array(
+				array(
+					'key'        => 'hp_drafted',
+					'type'       => 'integer',
+					'searchable' => true,
+					'label'      => 'Drafted flag (0/1)',
+				),
+			),
+			array( 'post_types' => array( 'hp_listing', 'hp_request' ) )
+		);
+	}
+
+	/**
+	 * HivePress Bookings (post_type=hp_booking): slot-availability lookups.
+	 *
+	 * @return void
+	 */
+	private static function register_hp_booking_core_group(): void {
+		TMDO_Entity_Registry::register_group(
+			'post',
+			'hp_booking_core',
+			array(
+				array(
+					'key'        => 'hp_start_time',
+					'type'       => 'integer',
+					'searchable' => true,
+					'label'      => 'Booking start unix ts',
+				),
+				array(
+					'key'        => 'hp_end_time',
+					'type'       => 'integer',
+					'searchable' => true,
+					'label'      => 'Booking end unix ts',
+				),
+				array(
+					'key'   => 'hp_quantity',
+					'type'  => 'integer',
+					'label' => 'Places booked',
+				),
+			),
+			array( 'post_types' => array( 'hp_booking' ) )
+		);
+	}
+
+	/**
+	 * HivePress Memberships plan (post_type=hp_membership_plan).
+	 *
+	 * @return void
+	 */
+	private static function register_hp_membership_plan_core_group(): void {
+		TMDO_Entity_Registry::register_group(
+			'post',
+			'hp_membership_plan_core',
+			array(
+				array(
+					'key'   => 'hp_expire_period',
+					'type'  => 'integer',
+					'label' => 'Plan expiry period (days)',
+				),
+				array(
+					'key'        => 'hp_primary',
+					'type'       => 'integer',
+					'searchable' => true,
+					'label'      => 'Primary plan flag (0/1)',
+				),
+			),
+			array( 'post_types' => array( 'hp_membership_plan' ) )
+		);
+	}
+
+	/**
+	 * HivePress Memberships subscription (post_type=hp_membership).
+	 *
+	 * @return void
+	 */
+	private static function register_hp_membership_core_group(): void {
+		TMDO_Entity_Registry::register_group(
+			'post',
+			'hp_membership_core',
+			array(
+				array(
+					'key'        => 'hp_expired_time',
+					'type'       => 'integer',
+					'searchable' => true,
+					'label'      => 'Expiry unix ts',
+				),
+			),
+			array( 'post_types' => array( 'hp_membership' ) )
+		);
+	}
+
 	/**
 	 * HivePress listing core meta keys (post_type=hp_listing).
 	 * Aligns with the existing wpdo_hot_hp_listing flat table; v2.9.5 will
diff --git a/tests/unit/HivePressEntityGroupsTest.php b/tests/unit/HivePressEntityGroupsTest.php
index 72fface..db610ce 100644
--- a/tests/unit/HivePressEntityGroupsTest.php
+++ b/tests/unit/HivePressEntityGroupsTest.php
@@ -75,7 +75,41 @@ class HivePressEntityGroupsTest extends TestCase {
 		$this->assertNull( TMDO_Entity_Registry::get_field( 'post', 'hp_rating', 'post' ), 'HivePress keys stay native on other post types' );
 	}
 
-	public function test_reconciler_plans_the_eight_misrouted_hivepress_keys(): void {
+	/**
+	 * Fields only the Hot zone used to cover (ADR-003), as their own groups.
+	 */
+	private const HOT_ONLY_GROUPS = array(
+		'hp_draft_flags'          => array( array( 'hp_listing', 'hp_request' ), array( 'hp_drafted' ) ),
+		'hp_booking_core'         => array( array( 'hp_booking' ), array( 'hp_start_time', 'hp_end_time', 'hp_quantity' ) ),
+		'hp_membership_plan_core' => array( array( 'hp_membership_plan' ), array( 'hp_expire_period', 'hp_primary' ) ),
+		'hp_membership_core'      => array( array( 'hp_membership' ), array( 'hp_expired_time' ) ),
+	);
+
+	public function test_hot_only_fields_have_entity_groups_scoped_to_their_post_types(): void {
+		foreach ( self::HOT_ONLY_GROUPS as $group => list( $post_types, $keys ) ) {
+			$this->assertSame( $post_types, TMDO_Entity_Registry::get_group_post_types( 'post', $group ), $group );
+			$this->assertSame( $keys, TMDO_Entity_Registry::get_group_keys( 'post', $group ), $group );
+		}
+	}
+
+	public function test_hot_only_fields_route_to_their_group_when_scoped_routing_is_on(): void {
+		$GLOBALS['_wp_options'][ TMDO_Entity_Registry::SCOPED_ROUTING_OPTION ] = '1';
+
+		foreach ( self::HOT_ONLY_GROUPS as $group => list( $post_types, $keys ) ) {
+			foreach ( $post_types as $post_type ) {
+				foreach ( $keys as $key ) {
+					$this->assertSame( $group, TMDO_Entity_Registry::get_field( 'post', $key, $post_type )['group'], "{$post_type}:{$key}" );
+				}
+			}
+		}
+		$this->assertSame( 'hp_listing_core', TMDO_Entity_Registry::get_field( 'post', 'hp_expired_time', 'hp_listing' )['group'] );
+	}
+
+	public function test_hot_only_groups_add_no_collisions(): void {
+		$this->assertSame( array(), TMDO_Entity_Registry::get_collisions() );
+	}
+
+	public function test_reconciler_plans_the_misrouted_hivepress_keys(): void {
 		$moves = array();
 		foreach ( TMDO_Post_Group_Reconciler::plan() as $m ) {
 			$moves[] = "{$m['source']}>{$m['target']}:{$m['key']}";
@@ -87,6 +121,7 @@ class HivePressEntityGroupsTest extends TestCase {
 				'hp_request_core>hp_listing_core:hp_expired_time',
 				'hp_request_core>hp_listing_core:hp_status',
 				'hp_request_core>hp_listing_core:hp_view_count',
+				'hp_request_core>hp_membership_core:hp_expired_time',
 				'hp_vendor_core>hp_listing_core:hp_hourly_rate',
 				'hp_vendor_core>hp_listing_core:hp_rating',
 				'hp_vendor_core>hp_listing_core:hp_rating_count',