diff --git a/CHANGELOG.md b/CHANGELOG.md
index 00f5fcca7..9bbd157ab 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,8 +8,10 @@ Format based on [Keep a Changelog](https://keepachangelog.com/).
 
 ### Added
 - LocalBridge IPC over Unix domain sockets (#78) — length-prefixed MessagePack framing, SimBridge implementation, BridgeResource ECS wrapper
-- Tile collision system (#236) — TilePosition component, WalkabilityMap resource with O(1) lookup, MoveIntent + validate_movement system
-- 18 new tests (4 framing + 2 IPC integration + 11 movement unit + 1 movement integration), total 38
+- Tile collision system (#236) — TilePosition component, chunk-based WalkabilityMap (D-012), MoveIntent + validate_movement system
+- TilePosition ↔ f32 render coordinate conversion (to_render_coords, from_render_coords) bridging simulation and wire format
+- Chunk load/unload support in WalkabilityMap — HashMap<ChunkCoord, ChunkData> with 32x32 tile chunks
+- 21 new tests (4 framing + 2 IPC integration + 14 movement unit + 1 movement integration), total 41
 - `db/connectors/ticket` CLI — ergonomic ticket management (list, show, create, assign, sprint, deps, search, epics, children, count) with JSON output
 - Sprint 1 "Run" created with 8 stories targeting moving character on screen via IPC bridge
 - Ticket skill rewritten to use ticket CLI instead of raw SQL wrapper scripts
@@ -78,6 +80,9 @@ Format based on [Keep a Changelog](https://keepachangelog.com/).
 - Rejected alternatives R-004 through R-010 documented (pure Bevy, pure Godot, GDExtension, C++ GDExtension, Fyrox, custom framework, protobuf)
 
 ### Fixed
+- WalkabilityMap rewritten from flat Vec to chunk-based HashMap per D-012 architecture (Tyre review)
+- LocalBridge mutex .unwrap() → .expect() for clearer panic messages (Hoshe review)
+- Documented 16MB MAX_MESSAGE_SIZE rationale in framing.rs (Hoshe review)
 - Client input_mapper double-check bug (redundant event.pressed + is_action_pressed)
 - Bounds validation on snapshot position arrays in game_state.gd and entity_renderer.gd
 - Deterministic test snapshots (replaced Time.get_ticks_msec() with incrementing counter)