diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7cf3fb8b..06e02edc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -23,6 +23,12 @@ This release also adds the community infrastructure that powers the showcase: de
 - **Telemetry data integrity.** Source tagging, UUID fingerprint, duration guards, error context fields.
 - **Supabase security lockdown.** RLS tightened, edge functions validate schema, source=live filtering.
 
+## [0.13.5.1] - 2026-03-29 — Gitignore .factory
+
+### Changed
+
+- **Stop tracking `.factory/` directory.** Generated Factory Droid skill files are now gitignored, same as `.claude/skills/` and `.agents/`. Removes 29 generated SKILL.md files from the repo. The `setup` script and `bun run build` regenerate these on demand.
+
 ## [0.13.5.0] - 2026-03-29 — Factory Droid Compatibility
 
 gstack now works with Factory Droid. Type `/qa` in Droid and get the same 29 skills you use in Claude Code. This makes gstack the first skill library that works across Claude Code, Codex, and Factory Droid.