In .claude/plugins/quacker-channel/src/acp_dispatch.rs, the git helper functions git_head_sha, add_worktree, remove_worktree, commits_since and diff_stat each spell out a "-C" plus a path argument when building their git command (via run_git). Reduce that repetition by introducing one small helper and using it in those functions. Keep behavior identical and change nothing else. Then run: git add -A && git commit -m "refactor: dedupe git -C arg".