Branch cleaner

Workflow

1. Resolve the repository, current branch, remote, and remote default branch from Git. Ask only when they remain ambiguous.
2. Fetch and prune remote-tracking refs, then collect evidence:

- git status -sb - git worktree list --porcelain - git branch --merged <remote>/<default> and git branch --no-merged <remote>/<default> - git for-each-ref refs/heads --sort=committerdate --format="%(committerdate:iso8601) %(refname:short) %(upstream:short) %(upstream:track)"

1. When GitHub context is available, prefer the GitHub connector for open/merged PR metadata and branch protection context. Use gh only as a fallback.
2. Exclude the current branch, the default branch, branches checked out in any worktree, protected branches or rulesets, and branches with open PRs. If open-PR or protection state cannot be verified, keep the branch report-only.
3. Group candidates by evidence:

- merged into the fetched default branch; - upstream gone; - old but unmerged, which is report-only unless the user explicitly approves force deletion.

1. Present concrete branch names, last commit dates, merge state, and local/remote scope before deleting anything.
2. Delete only approved candidates:

- immediately before each deletion, fetch current evidence and recheck the branch tip SHA, worktree use, open PRs, and protection or ruleset state against the reviewed candidate; - skip the branch if its tip or state changed, or if any safety check is unavailable; - local merged branch: git branch -d <branch>; - remote branch: git push <remote> --delete <branch> only when remote deletion was explicitly requested; - use git branch -D only for an individually named unmerged branch explicitly approved by the user.

1. Re-run the candidate commands and git status -sb to verify the result.

Safety

• Treat age as a review signal, never proof that a branch is safe to delete.
• Never delete through an unresolved glob or a generated command string.
• Do not remove a branch used by another worktree.
• Do not delete remote branches or force-delete unmerged branches without explicit approval.
• Preserve unrelated working-tree changes.

Deliverable

Report deleted branches, skipped branches with reasons, commands run, and any candidates still needing a decision.