- Add resolveWorktreeRoot() that detects linked worktrees via
git rev-parse --git-common-dir and resolves to the main worktree
where .planning/ lives
- Add withPlanningLock() file-based locking mechanism to prevent
concurrent worktrees from corrupting shared planning files
- Wire worktree root resolution into gsd-tools.cjs main entry point
- Add regression tests for resolveWorktreeRoot (non-git, normal repo)
and withPlanningLock (normal execution, error cleanup, stale lock
recovery)
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