diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1e97eb27f..1ea662ccf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,17 @@ Format based on [Keep a Changelog](https://keepachangelog.com/).
 ## [Unreleased]
 
 ### Added
+- KnowledgeGrant untagged enum with Fact and Entity variants, ContentEntityRegistry for NPC spawn-time entity resolution (D-079, #545)
+- KnowledgeGranted event processing — grants fire at dialogue line selection, runtime NPC KG guardrail (D-079, #546)
+- ContradictionClaim struct with 600-tick window detection in observe_entity, epistemic neutrality for both sources (D-083, #547)
+- NPC-to-NPC knowledge transfer system — trust-gated fact exchange, confidence capping at KnowsOf, ToldBy source construction (D-080, #548)
+- tell_state KG awareness — NPC relationship reads from KG for other-entity state, MVP information boundary (D-082, #549)
+- Contradiction monologue with pre-resolved entity names, PersonOfInterest relationship shift, THE FRIEND arc event chain (D-083, #550)
+- Unprompted disclosure system — DisclosureCandidates component, 7 trigger gates, three-layer rate limiting, two-stage trait filter (D-081, #551)
+- Trait modifier system — Cautious/Gossipy/Loyal/Talkative filter predicates via content-authorable config (D-081, #173)
+- POI data model and proximity-based discovery system via KnowledgeGranted events (#148, #149)
+- Protocol versioning tests — version round-trip, mismatch detection, serde_default migration pattern, full variant coverage (#232)
+- Team monitoring rules in CLAUDE.md — heartbeat rule for stuck agent detection, bottleneck detection pattern
 - `/sprint-status` cleanup sweep skill — consistent health report with tickets by status, PR cross-reference, bookkeeping issue detection, and open work by team
 - `sprint sweep` CLI subcommand — structured JSON output for sprint health checks (grouped tickets, per-team summary, issue detection)
 - 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