* fix: respect .gitignore for .gsd/ in rethink prompt (#2570)
The rethink.md prompt template hardcoded `git add .gsd/` which caused
the executing agent to force-add .gsd/ files (via `git add -f`) when
.gsd was listed in .gitignore. This silently overrode the user's
gitignore configuration, tracking planning artifacts they explicitly
excluded.
- Add `isGsdGitignored()` utility that uses `git check-ignore` to
detect when .gsd is covered by .gitignore rules
- Replace hardcoded `git add .gsd/` in rethink.md with the
`{{commitInstruction}}` template variable (consistent with all
other prompt templates)
- Pass gitignore-aware commit instruction from rethink.ts: skip
commit when .gsd is gitignored, include git add only when it is not
Closes#2570
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* ci: re-trigger checks
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Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
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