git-cleanup-merged

name	git-cleanup-merged
description	Clean up local branches and worktrees that have been merged into a target branch (default: main). Args: [target-branch]

Git Cleanup Merged

Clean up local branches and worktrees whose changes have already been merged into a target branch.

Args

/git-cleanup-merged [target-branch]

• target-branch — branch to check against. Default: main.

Refer to the target branch as $TARGET below.

Workflow

1. Detect merged branches

Use the git-detect-merged skill with $TARGET to identify all merged branches, their merge type, active work status, and associated worktrees.

• Treat untracked files under .tmp/ as ignorable temp output, not active work.

2. Build cleanup candidates

From the detection results:

• Include branches that are merged AND have no active work (status: clean).
• Include worktrees whose branch is merged AND clean.
• Exclude $TARGET and main — NEVER delete either.
• Exclude branches with active work (dirty or checked-out), even if merged.
• If .tmp/ is the only untracked content, still treat worktree as clean.

3. Present summary

Show the user a single summary listing:

• Worktrees to remove (path + branch)
• Branches to delete (name + merge type: regular/squash). Mark squash-merged branches as requiring -D — git branch -d cannot see squash merges and always fails on them.
• Skipped — merged branches/worktrees excluded due to active work, with the reason (e.g. "has uncommitted changes", "currently checked out")

If nothing to clean, say so and stop.

4. Confirm

Ask the user for a single confirmation before proceeding. Do NOT proceed without approval. This confirmation covers -D for branches marked squash-merged in the summary — their merge was already verified by patch-id in detection.

5. Execute cleanup

• Remove worktrees first (git worktree remove <path>), then delete branches.
• Regular merges → git branch -d <branch>. Squash merges → git branch -D <branch> (covered by step 4 confirmation).
• If -d unexpectedly fails on a regular-merge branch, ask the user before using -D.
• Report results after each step.

Rules

• NEVER delete $TARGET or main.
• NEVER touch remote branches or remote tracking refs.
• Use -d (safe delete) for regular merges. -D for squash-merged branches is pre-approved by the step 4 confirmation; any other -D requires explicit user approval.
• If a worktree removal fails, report the error and continue with the remaining items.
• If a branch delete fails, report the error and continue with the remaining items.