feat: basecamp-project skill

.pi/gsd/references/git-planning-commit.md

@@ -0,0 +1,38 @@
+# Git Planning Commit
+
+Commit planning artifacts using the gsd-tools CLI, which automatically checks `commit_docs` config and gitignore status.
+
+## Commit via CLI
+
+Always use `gsd-tools.cjs commit` for `.planning/` files - it handles `commit_docs` and gitignore checks automatically:
+
+```bash
+node ".pi/gsd/bin/gsd-tools.cjs" commit "docs({scope}): {description}" --files .planning/STATE.md .planning/ROADMAP.md
+```
+
+The CLI will return `skipped` (with reason) if `commit_docs` is `false` or `.planning/` is gitignored. No manual conditional checks needed.
+
+## Amend previous commit
+
+To fold `.planning/` file changes into the previous commit:
+
+```bash
+node ".pi/gsd/bin/gsd-tools.cjs" commit "" --files .planning/codebase/*.md --amend
+```
+
+## Commit Message Patterns
+
+| Command       | Scope     | Example                                         |
+| ------------- | --------- | ----------------------------------------------- |
+| plan-phase    | phase     | `docs(phase-03): create authentication plans`   |
+| execute-phase | phase     | `docs(phase-03): complete authentication phase` |
+| new-milestone | milestone | `docs: start milestone v1.1`                    |
+| remove-phase  | chore     | `chore: remove phase 17 (dashboard)`            |
+| insert-phase  | phase     | `docs: insert phase 16.1 (critical fix)`        |
+| add-phase     | phase     | `docs: add phase 07 (settings page)`            |
+
+## When to Skip
+
+- `commit_docs: false` in config
+- `.planning/` is gitignored
+- No changes to commit (check with `git status --porcelain .planning/`)