diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5f0542bd..b65293c6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,6 +19,12 @@ Browse output is now wrapped in trust boundary markers so agents can tell page c
 
 - **Factory Droid support.** Removed `--host factory`, `.factory/` generated skills, Factory CI checks, and all Factory-specific code paths.
 
+## [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.