diff --git a/CHANGELOG.md b/CHANGELOG.md
index 778af7d37..f96b55ae8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,16 @@ Format based on [Keep a Changelog](https://keepachangelog.com/).
 ## [Unreleased]
 
 ### Added
+- Round 17 content architecture workshop — Full team (8 agents, 3 rounds) defining content pipeline
+- D-023: Three-tier content model (authored drama modules, templated content, procedural filler) with life-sim substrate
+- D-024: NPC generation model — 10 axes (7 essential + 3 supporting) with CombatCapability ECS component
+- D-025: Social site / functional cluster as atomic Tier 2 template unit (4-8 NPCs, 15-40 tiles)
+- D-026: Simulation tiers with timestamp-based LRU eviction (Active/Background/State-saved/Ungenerated)
+- D-027: Vertical slice — smuggler + detective two-character proof-of-concept (supersedes D-006)
+- D-028: Dialogue architecture — tagged line pools with four relational layers (access tiers, history, trust-gating, unprompted disclosure)
+- D-029: Population entanglement ratio — 30% flat / 50% mundane triangles / 20% intrigue-entangled
+- Content architecture workshop brief documenting the "life first, drama second" design philosophy
+- Mellanie (Copywriter) activated from standby for content authoring phase
 - Round 16 faction development — Full faction framework with lore, political analysis, mechanical grounding (session closed, awaiting team input for v0.1 selection)
 - 3D reputation system: Trust × Usefulness × Exposure per faction
 - Faction mechanical grounding: starting loadouts, information asymmetry, blind spots, resource loops