diff --git a/CHANGELOG.md b/CHANGELOG.md
index 20671c164..0b7666531 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,9 @@ Format based on [Keep a Changelog](https://keepachangelog.com/).
 ## [Unreleased]
 
 ### Added
+- Q-018 through Q-023 — 6 open questions from architecture audit (shadowcasting, entity ID stability, collision resolution, tick overflow, pathfinding cache, debug visualization)
+- 5 architecture spike workshop briefs (knowledge graph, observer pipeline, NPC AI state machines, save/load, map authoring)
+- 17 tickets from architecture audit (#339-#355) — 7 Sprint 1 tasks, 5 Sprint 2+ tasks, 5 workshop epics
 - LocalBridge GDScript TCP transport (#79) — 4-byte big-endian length-prefix framing matching Rust server, StreamPeerTCP wrapper with partial read handling
 - ServerProcess subprocess manager — spawns/stops Rust server via OS.create_process(), auto-cleanup on destruction
 - SimBridge live transport integration — _process() polling loop for TCP receive/send, connection state machine (DISCONNECTED → CONNECTING → CONNECTED → ERROR)