Clean Gone

Cross-runtime: follow runtime compatibility for invocation, delegation, configuration precedence, state paths, and permissions.

You are cleaning up local Git branches whose remote tracking branch has been deleted (shown as [gone] by Git), along with any worktrees checked out to them. This is destructive, so it is designed to be safe by default: it never discards uncommitted work or unmerged commits without explicit, informed confirmation. Follow each step in order.

Step 1: Parse Arguments

• --dry-run → show exactly what would be removed and stop. In dry-run, make no changes to Git state at all (no fetch/prune, no deletion).

Default (no args): proceed through confirmation (Step 4) before any deletion.

Step 2: Refresh Remote State (skip on --dry-run)

Only when NOT --dry-run, prune stale remote-tracking refs so [gone] is accurate:

git fetch --prune

• On --dry-run, do NOT run this (it mutates local refs). Use the current tracking state and note in the output that it may be stale — the user can re-run without --dry-run to refresh.
• If fetch fails (offline, no remote), warn and continue with the current state.

Step 3: Identify Gone Branches

List local branches whose upstream is marked [gone]:

git for-each-ref --format '%(refname:short) %(upstream:track)' refs/heads \
  | awk '$2 == "[gone]" { print $1 }'

Resolve the protected branches (never delete these) from .git-workflow/config.yaml, then .claude/config.yaml as a legacy read-only fallback, then defaults:

• workflow.developmentBranch — default staging
• workflow.productionBranch — default main
• Also always protect: the current branch (git branch --show-current), and master.

Exclude every protected branch from the deletion list even if it is marked [gone] (a gone staging/main is a config/remote quirk, not a signal to delete it).

Step 4: Assess Safety and Confirm

For each candidate branch, gather safety signals to show the user:

• Merged? Whether the branch's commits are already integrated (see Step 6 — prefer git branch -d, which refuses unmerged branches).
• Attached worktree? And whether that worktree is dirty (see Step 5).

Present a table: branch → merged/unmerged → worktree path (clean/dirty). Then:

• On --dry-run: print the table and stop (no changes).
• Otherwise, ask the user to confirm. Call out any unmerged branches and any dirty worktrees explicitly — these lose data if removed. Default to NOT removing those unless the user explicitly opts in.

Step 5: Remove Associated Worktrees (safely)

A branch checked out in a linked worktree cannot be deleted until the worktree is removed. Map worktrees to branches:

git worktree list --porcelain

For each gone branch with a worktree, check for uncommitted work first:

git -C "{worktree_path}" status --porcelain --untracked-files=all

• If the output is empty (clean): remove it with git worktree remove "{worktree_path}" (no --force needed for a clean worktree).
• If non-empty (dirty/untracked files): do NOT remove it unless the user explicitly confirmed discarding its contents in Step 4. Only then use git worktree remove --force "{worktree_path}". Otherwise skip the branch and report why.

Then prune administrative leftovers: git worktree prune.

Step 6: Delete the Branches (merged-safe)

For each confirmed branch, try the safe delete first:

git branch -d "{branch_name}"

• -d succeeds only if the branch is already merged (into HEAD or its upstream). This is the desired path for the common "PR merged, remote branch deleted" case.

• If -d fails because the branch is not merged, the branch has local commits that exist nowhere else. Show them:

  git log --oneline "{branch_name}" --not --remotes
  

  Report these commits and ask the user for explicit confirmation before force-deleting. Only on explicit confirmation:

  git branch -D "{branch_name}"
  

Never force-delete (-D) unmerged branches without showing the commits and getting a clear yes.

Step 7: Report

Print a summary:

Pruned gone branches:
  ✓ feature/eng-123-old-thing    (merged; worktree removed: ../wt-eng-123)
  ✓ fix/proj-456-done            (merged)
  ⚠ spike/experiment             (skipped: 3 unmerged commits — not deleted)
  ⚠ feature/wip                  (skipped: worktree has uncommitted changes)

Removed: 2 branches, 1 worktree. Skipped: 2.

If nothing was gone, say so plainly: "No gone branches to clean up."

Error Handling