diff --git a/CHANGELOG.md b/CHANGELOG.md
index d39367ff..af5537c5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,6 +21,12 @@ Six community fixes with 16 new tests. Telemetry off now means off everywhere. S
 - **`bin/gstack-relink`** re-creates skill symlinks when you change `skill_prefix` via `gstack-config set`. No more manual `./setup` re-run needed.
 - **`bin/gstack-open-url`** cross-platform URL opener (macOS: `open`, Linux: `xdg-open`, Windows: `start`).
 
+## [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.