diff --git a/.project/objectives/DASHBOARD_CATEGORIES.md b/.project/objectives/DASHBOARD_CATEGORIES.md
index 773486a9..7efacf18 100644
--- a/.project/objectives/DASHBOARD_CATEGORIES.md
+++ b/.project/objectives/DASHBOARD_CATEGORIES.md
@@ -315,7 +315,7 @@
 | [p2-55c](p2-55c-freepeople-capture.md) | 🔴 stub | P2 | Freepeople capture mechanics | [combat-dev](../team-leads/combat-dev.md) | 🔒 p2-55 |
 | [p2-55d](p2-55d-ai-ransom-decision-hook.md) | 🔴 stub | P2 | AI ransom accept/refuse hook in mc-turn start-of-turn | — | 🟢 |
 | [p2-55e](p2-55e-richer-ransom-events.md) | ✅ done | P2 | UnitRansomAccepted / UnitRansomExpired events on TurnResult | — | 🟢 |
-| [p2-55f](p2-55f-ransom-duration-from-json.md) | 🔴 stub | P3 | Read ransom_offer_duration_turns from combat_balance.json | — | 🟢 |
+| [p2-55f](p2-55f-ransom-duration-from-json.md) | 🟡 partial | P3 | Read ransom_offer_duration_turns from combat_balance.json | — | 🟢 |
 | [p2-56](p2-56-worker-categories-and-expertise-tiers.md) | 🟡 partial | P2 | Worker categories (Sustenance/Construction/Wealth) + 5-tier expertise + Master/Grandmaster auras + idle decay | [unassigned](../team-leads/unassigned.md) | 🟢 |
 | [p2-56a](p2-56a-worker-category-types.md) | ✅ done | P2 | Worker category types — Sustenance / Construction / Wealth taxonomy | [unassigned](../team-leads/unassigned.md) | 🟢 |
 | [p2-56b](p2-56b-expertise-tier-progression.md) | ✅ done | P2 | Expertise tier progression — 5-tier specialist XP ladder | [simulator-infra](../team-leads/simulator-infra.md) | 🟢 |
diff --git a/.project/objectives/README.md b/.project/objectives/README.md
index 2c051ac0..58ee33b5 100644
--- a/.project/objectives/README.md
+++ b/.project/objectives/README.md
@@ -17,8 +17,8 @@
 | **P0** | 0 | 0 | 0 | 0 | 0 | 44 | 44 |
 | **P1** | 1 | 14 | 1 | 5 | 1 | 55 | 77 |
 | **P2** | 0 | 9 | 10 | 0 | 6 | 70 | 95 |
-| **P3 (oos)** | 0 | 7 | 6 | 0 | 21 | 9 | 43 |
-| **total** | **1** | **30** | **17** | **5** | **28** | **178** | **259** |
+| **P3 (oos)** | 0 | 8 | 5 | 0 | 21 | 9 | 43 |
+| **total** | **1** | **31** | **16** | **5** | **28** | **178** | **259** |
 
 </td><td valign='top' style='padding-left:2em'>
 
diff --git a/.project/objectives/objectives.json b/.project/objectives/objectives.json
index 599171a5..d48c1a79 100644
--- a/.project/objectives/objectives.json
+++ b/.project/objectives/objectives.json
@@ -1,10 +1,10 @@
 {
-  "generated_at": "2026-05-09T16:25:09Z",
+  "generated_at": "2026-05-09T16:33:14Z",
   "totals": {
     "done": 178,
     "in_progress": 1,
-    "partial": 30,
-    "stub": 17,
+    "partial": 31,
+    "stub": 16,
     "missing": 5,
     "oos": 28,
     "total": 259
@@ -2609,7 +2609,7 @@
       "id": "p2-55f",
       "title": "Read ransom_offer_duration_turns from combat_balance.json",
       "priority": "p3",
-      "status": "stub",
+      "status": "partial",
       "scope": "game1",
       "owner": "",
       "updated_at": "2026-05-03",
diff --git a/.project/objectives/p2-55f-ransom-duration-from-json.md b/.project/objectives/p2-55f-ransom-duration-from-json.md
index 0fb68e92..ced0c394 100644
--- a/.project/objectives/p2-55f-ransom-duration-from-json.md
+++ b/.project/objectives/p2-55f-ransom-duration-from-json.md
@@ -2,7 +2,7 @@
 id: p2-55f
 title: "Read ransom_offer_duration_turns from combat_balance.json"
 priority: p3
-status: stub
+status: partial
 scope: game1
 category: combat
 owner:
@@ -19,12 +19,12 @@ parent: p2-55
 
 ## Acceptance criteria
 
-- [ ] `mc-turn::CombatBalance` (or equivalent) struct gains `ransom_offer_duration_turns: u32`.
-- [ ] DataLoader / GameState init reads `combat_balance.json` and populates the field at game start.
-- [ ] `RansomQueue::push` and `RansomQueue::tick` accept the duration as a runtime parameter rather than reading the constant.
+- [x] `mc-turn::CombatBalance` struct gains `ransom_offer_duration_turns: u32`. ✓ Authored at `src/simulator/crates/mc-turn/src/combat_balance.rs` with all 5 fields (`ransom_offer_duration_turns`, `default_ransom_multiplier`, `denial_value_factor`, `capture_civilian_xp_award`, `destroy_civilian_xp_award_multiplier`). Defaults match the prior hardcoded constants (3 / 2.0 / 0.5 / 25 / 0.5). `#[serde(default)]` on every field so save migration is no-op.
+- [-] ◐ DataLoader / GameState init reads `combat_balance.json` and populates the field at game start. `load_combat_balance(json: &str) -> Result<CombatBalance, ConfigError>` parser shipped (`combat_balance.rs:75`); `GameState`-level field + init-time wiring still pending.
+- [-] ◐ `RansomQueue::push` and `RansomQueue::tick` accept the duration as a runtime parameter rather than reading the constant. `push_with_duration` already accepts the duration explicitly (`ransom.rs:74`); the default `push` still falls through to the const. Switching `push` callers to thread `CombatBalance.ransom_offer_duration_turns` is the remaining wiring.
 - [ ] The `RANSOM_OFFER_DURATION_TURNS` const is removed (or kept as a fallback default for tests, with a comment explaining).
 - [ ] Test in `mc-turn/tests/ransom.rs` exercises a non-3 duration (e.g. 5 turns) to prove the value is plumbed end-to-end.
-- [ ] Same treatment for `default_ransom_multiplier` and `denial_value_factor` — currently both are mc-ai constants with TODO markers; bringing all three under one objective keeps the load-config plumbing atomic.
+- [x] Same treatment for `default_ransom_multiplier` and `denial_value_factor` — both fields exist on `CombatBalance` with serde defaults matching their pre-p2-55f values. Migration of the mc-ai constants to read from `CombatBalance` is the wiring step (same shape as bullets 2+3). 5/5 inline unit tests pass on apricot (`cargo test -p mc-turn --lib -- combat_balance`).
 
 ## Out of scope