diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9bbd157ab..d31ea8f2f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,7 +11,9 @@ Format based on [Keep a Changelog](https://keepachangelog.com/).
 - 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
+- 8-directional movement — diagonal PlayerAction variants (MoveNortheast/Northwest/Southeast/Southwest) + TilePosition::all_neighbors()
+- Entity-entity collision in validate_movement — spatial occupancy check prevents multiple entities on same tile
+- 25 new tests (4 framing + 2 IPC integration + 17 movement unit + 2 movement integration), total 45
 - `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