diff --git a/public/games/age-of-dwarves/data/ai_personalities.json b/public/games/age-of-dwarves/data/ai_personalities.json
index 13154501..22fe2e19 100644
--- a/public/games/age-of-dwarves/data/ai_personalities.json
+++ b/public/games/age-of-dwarves/data/ai_personalities.json
@@ -249,6 +249,21 @@
     "destroy_civilian_aggression": 0.6,
     "promotion_offense_weight": 1.0,
     "promotion_defense_weight": 1.0,
-    "promotion_mobility_weight": 1.0
+    "promotion_mobility_weight": 1.0,
+    "building_category_weights": {
+      "production": 1.0,
+      "infrastructure": 1.1,
+      "military": 1.0,
+      "knowledge": 1.4,
+      "religious": 1.0,
+      "wonder": 1.1,
+      "naval": 0.9
+    },
+    "wonder_priorities": {
+      "the_great_forge": 1.2,
+      "ancestral_forge": 1.2,
+      "undermount_vault": 1.2,
+      "ancient_lighthouse": 1.1
+    }
   }
 }
diff --git a/src/simulator/crates/mc-player-api/src/projection.rs b/src/simulator/crates/mc-player-api/src/projection.rs
index 24a134f6..be0dec88 100644
--- a/src/simulator/crates/mc-player-api/src/projection.rs
+++ b/src/simulator/crates/mc-player-api/src/projection.rs
@@ -1576,6 +1576,59 @@ mod tests {
         assert_eq!(t.players[0].promotion_mobility_weight, 1.0);
     }
 
+    #[test]
+    fn tactical_building_priors_round_trip_from_player_state() {
+        // p1-42b — `building_priors` is now a first-class PlayerState field
+        // populated by `GdGameState::set_player_personality_json`. The
+        // projection must read it straight through into TacticalPlayerState
+        // (rather than seeding `BuildingPriors::default()`) so the catalog-
+        // driven scorer in `mc_ai::tactical::production::score_building`
+        // sees per-personality `building_category_weights` and
+        // `wonder_priorities`.
+        let mut state = GameState::default();
+        let mut ps = PlayerState::default();
+        ps.player_index = 0;
+        ps.building_priors
+            .building_category_weights
+            .insert("production".into(), 1.6);
+        ps.building_priors
+            .building_category_weights
+            .insert("military".into(), 0.9);
+        ps.building_priors
+            .wonder_priorities
+            .insert("the_great_forge".into(), 2.0);
+        state.players.push(ps);
+
+        let t = project_tactical(&state, 0);
+        let p = &t.players[0];
+        assert!(
+            (p.building_priors.building_category_weights["production"] - 1.6).abs() < 1e-6,
+            "production category weight must round-trip through projection"
+        );
+        assert!(
+            (p.building_priors.building_category_weights["military"] - 0.9).abs() < 1e-6,
+            "military category weight must round-trip through projection"
+        );
+        assert!(
+            (p.building_priors.wonder_priorities["the_great_forge"] - 2.0).abs() < 1e-6,
+            "wonder priority must round-trip through projection"
+        );
+    }
+
+    #[test]
+    fn tactical_building_priors_default_for_unstamped_player() {
+        // Fixtures predating p1-42b leave `PlayerState::building_priors` at
+        // its serde-default (empty maps). The projection must surface that
+        // unchanged so the scorer's axis-driven fall-through still fires.
+        let state = make_state(1, 0, vec![]);
+        let t = project_tactical(&state, 0);
+        assert!(t.players[0]
+            .building_priors
+            .building_category_weights
+            .is_empty());
+        assert!(t.players[0].building_priors.wonder_priorities.is_empty());
+    }
+
     #[test]
     fn tactical_difficulty_mult_defaults_to_one_when_unset() {
         // Same coercion logic as promotion weights — Default::default() gives
diff --git a/src/simulator/crates/mc-turn/tests/capture_caravan.rs b/src/simulator/crates/mc-turn/tests/capture_caravan.rs
new file mode 100644
index 00000000..97fd5254
--- /dev/null
+++ b/src/simulator/crates/mc-turn/tests/capture_caravan.rs
@@ -0,0 +1,218 @@
+//! p2-55b — Caravan Master / Merchant capture mechanics (end-to-end PvP).
+//!
+//! Trade-route persistence (g6-02) is out-of-scope post-v10, so in Game 1
+//! a captured caravan_master / merchant is structurally identical to any
+//! other support civilian (worker, founder, engineer): owner flips, AP
+//! resets, ransom price = build_cost × ransom_multiplier. The trade-GP
+//! premium lives entirely in the JSON `ransom_multiplier` (merchant 3.0,
+//! caravan_master 3.5).
+//!
+//! Pins three properties end-to-end through the TurnProcessor:
+//!
+//! 1. A captured caravan_master flips ownership like any civilian and emits
+//!    exactly one `TurnEvent::UnitCaptured`.
+//! 2. The captor does NOT inherit a partially-charged action — AP resets
+//!    to zero on transfer (universal Specialist policy).
+//! 3. A ransomed merchant carries the tier-1 trade-GP premium price
+//!    (build_cost 80 × ransom_multiplier 3.0 = 240), strictly above the
+//!    worker baseline at equal build cost.
+
+use mc_core::units::ActionPoints;
+use mc_replay::TurnEvent;
+use mc_turn::{
+    capture::CapturePosture, AttackRequest, GameState, MapUnit, PlayerState, TurnProcessor,
+};
+use mc_units::{UnitStats as CatalogUnitStats, UnitsCatalog};
+
+const CARAVAN_ID: u32 = 900;
+const MERCHANT_ID: u32 = 901;
+
+fn build_trade_catalog() -> UnitsCatalog {
+    let mut cat = UnitsCatalog::new();
+    cat.insert(CatalogUnitStats {
+        id: "dwarf_warrior".into(),
+        base_moves: 2,
+        domain: "land".into(),
+        action_point_capacity: None,
+        capturable: false,
+        ransom_multiplier: 2.0,
+        build_cost: 0,
+    });
+    // merchant.json: tier-1 trade GP — premium ransom multiplier, modest cost.
+    cat.insert(CatalogUnitStats {
+        id: "merchant".into(),
+        base_moves: 4,
+        domain: "land".into(),
+        action_point_capacity: Some(6),
+        capturable: true,
+        ransom_multiplier: 3.0,
+        build_cost: 80,
+    });
+    // caravan_master.json: tier-3 — higher cost AND higher multiplier.
+    cat.insert(CatalogUnitStats {
+        id: "caravan_master".into(),
+        base_moves: 4,
+        domain: "land".into(),
+        action_point_capacity: Some(6),
+        capturable: true,
+        ransom_multiplier: 3.5,
+        build_cost: 160,
+    });
+    cat
+}
+
+fn fixture(posture: CapturePosture, defender_unit_id: &str, defender_id: u32, ap_current: u8) -> GameState {
+    let mut state = GameState {
+        turn: 0,
+        players: vec![
+            PlayerState {
+                player_index: 0,
+                default_civilian_posture: posture,
+                ..Default::default()
+            },
+            PlayerState {
+                player_index: 1,
+                ..Default::default()
+            },
+        ],
+        grid: None,
+        ..Default::default()
+    };
+    state.units_catalog = build_trade_catalog();
+
+    state.players[0].units.push(MapUnit {
+        id: 311,
+        col: 10,
+        row: 10,
+        hp: 60,
+        max_hp: 60,
+        attack: 50,
+        defense: 10,
+        unit_id: "dwarf_warrior".into(),
+        ..Default::default()
+    });
+
+    state.players[1].units.push(MapUnit {
+        id: defender_id,
+        col: 10,
+        row: 10,
+        hp: 1,
+        max_hp: 50,
+        attack: 0,
+        defense: 0,
+        unit_id: defender_unit_id.into(),
+        action_points: Some(ActionPoints {
+            current: ap_current,
+            capacity: 6,
+        }),
+        ..Default::default()
+    });
+
+    state.pending_pvp_attacks.push(AttackRequest {
+        attacker_player: 0,
+        attacker_unit: 0,
+        defender_player: 1,
+        defender_unit: 0,
+    });
+    state
+}
+
+#[test]
+fn captured_caravan_master_flips_owner_and_emits_unit_captured_event() {
+    let mut state = fixture(CapturePosture::Capture, "caravan_master", CARAVAN_ID, 5);
+    let processor = TurnProcessor::new(500);
+    let result = processor.step(&mut state);
+
+    assert_eq!(
+        state.players[1]
+            .units
+            .iter()
+            .filter(|u| u.id == CARAVAN_ID)
+            .count(),
+        0,
+        "captured caravan_master must leave prior owner's units vec"
+    );
+    let moved = state.players[0]
+        .units
+        .iter()
+        .find(|u| u.id == CARAVAN_ID)
+        .expect("caravan_master must be re-owned by captor");
+    assert_eq!(moved.unit_id, "caravan_master");
+
+    let captured_count = result
+        .events_emitted
+        .iter()
+        .filter(
+            |e| matches!(e, TurnEvent::UnitCaptured { unit_id, .. } if *unit_id == CARAVAN_ID),
+        )
+        .count();
+    assert_eq!(
+        captured_count, 1,
+        "exactly one TurnEvent::UnitCaptured for the caravan_master; got {:?}",
+        result.events_emitted
+    );
+}
+
+#[test]
+fn captured_caravan_master_resets_action_points_to_zero() {
+    // Caravan Master carried 5/6 AP at capture time. Under the new owner,
+    // AP must be 0/6 — universal Specialist AP-reset policy applies to
+    // trade specialists the same as it does to engineers.
+    let mut state = fixture(CapturePosture::Capture, "caravan_master", CARAVAN_ID, 5);
+    let processor = TurnProcessor::new(500);
+    let _ = processor.step(&mut state);
+
+    let moved = state.players[0]
+        .units
+        .iter()
+        .find(|u| u.id == CARAVAN_ID)
+        .expect("captured caravan_master must land in captor's units vec");
+    let ap = moved
+        .action_points
+        .expect("caravan_master keeps its AP pool after capture (capacity intact)");
+    assert_eq!(
+        ap.current, 0,
+        "p2-55b: captured caravan_master's AP.current must reset to 0; got {ap:?}"
+    );
+    assert_eq!(
+        ap.capacity, 6,
+        "AP capacity is per-unit-type and survives capture"
+    );
+}
+
+#[test]
+fn merchant_ransom_offer_uses_great_merchant_multiplier() {
+    // merchant.json: build_cost 80, ransom_multiplier 3.0 → price 240.
+    // Worker baseline at the same build_cost would be 80 × 2.0 = 160 — the
+    // great_merchant premium must surface as a strictly higher offer.
+    let mut state = fixture(CapturePosture::Ransom, "merchant", MERCHANT_ID, 3);
+    let processor = TurnProcessor::new(500);
+    let result = processor.step(&mut state);
+
+    let captive = state.players[1]
+        .units
+        .iter()
+        .find(|u| u.id == MERCHANT_ID)
+        .expect("ransomed merchant stays in prior-owner vec until accept/refuse/expire");
+    assert_eq!(
+        captive.captive_of,
+        Some(0),
+        "captive_of must point at captor while offer is open"
+    );
+
+    let offer = result
+        .ransom_offers_created
+        .iter()
+        .find(|o| o.unit_id == MERCHANT_ID)
+        .expect("UnitRansomOfferedEvent on TurnResult.ransom_offers_created");
+    assert_eq!(
+        offer.price, 240,
+        "merchant ransom price = build_cost (80) × great_merchant multiplier (3.0); got {}",
+        offer.price
+    );
+    assert!(
+        offer.price > 160,
+        "merchant ransom (240) must exceed worker baseline at equal build_cost (160); got {}",
+        offer.price
+    );
+}