chore(meta): update changelog

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

CHANGELOG.md

@@ -7,6 +7,17 @@ Format based on [Keep a Changelog](https://keepachangelog.com/).
 ## [Unreleased]
 
 ### Added
+- Knowledge Flow & NPC Boundaries workshop — 5 D-records (D-079–D-083) covering grant architecture, NPC-to-NPC propagation, unprompted disclosure, NPC information boundaries MVP, contradiction detection pipeline
+- 7 knowledge graph implementation tickets (#545–#551) with full dependency chain and line estimates
+- Contradiction monologue content ticket (#552) for Sera/Kael FRIEND arc
+- Sprint 17 completion proofs: contradiction detection fires, NPC-to-NPC knowledge transfers
+
+### Changed
+- Sprint 17 briefings updated with workshop results — server (14 tickets), copy (2 tickets), client (2), visual (1)
+- Q-024 (gossip timing), Q-025 (KG memory), Q-026 (contradiction detection) closed
+- Sprint 16 closed (8/8 done)
+
+### Previously added
 - 3D sprite render pipeline — Camera3D at D-019 angle (-72.5° from horizontal), three-point studio lighting rig, orthographic projection, resolution chain 1024→256→64
 - Generic NPC capsule model (24×32px footprint per D-044) and structural wall model for pipeline validation
 - Test sprites: 8 runtime 64px sprites (NPC + wall × 4 directions) deployed to client/assets/sprites/