diff --git a/CHANGELOG.md b/CHANGELOG.md
index 681f2649..1d8e73a4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,19 @@ All notable changes to TFTSR are documented here.
 Commit types shown: feat, fix, perf, docs, refactor.
 CI, chore, and build changes are excluded unless they affect developer workflow.
 
+## [0.2.66] — 2026-04-20
+
+### Features
+- Integrate incident response methodology into all 17 domain prompts
+- Add timeline_events table for UTC timestamp tracking during triage
+- Populate RCA and postmortem documents with real timeline data
+
+### Bug Fixes
+- **ci**: Switch PR review from Ollama to liteLLM (qwen2.5-72b)
+
+### Security
+- Harden timeline event input validation and atomic writes
+
 ## [0.2.65] — 2026-04-15
 
 ### Bug Fixes