/wt:merge-pr - Merge PR and Clean Up Worktree

Description

Squash-merges an open GitHub PR for a story branch, deletes branches, and removes the local worktree. Designed for automated use from QA completion workflows.

Usage

/wt:merge-pr {STORY_ID} /wt:merge-pr {STORY_ID} {PR_NUMBER}

Examples

/wt:merge-pr WINT-1012 /wt:merge-pr WINT-1012 42

Parameters

Parameter Required Default Description

STORY_ID

Yes — Story identifier (e.g., WINT-1012 )

PR_NUMBER

No (discovered via gh) PR number to merge. If absent, discovered from branch name.

What It Does

This slash command:

• Finds the open PR for the story branch (or uses provided PR number)

• Squash-merges the PR via GitHub

• Deletes the remote branch (handled by --delete-branch )

• Removes the local worktree

• Cleans up the local branch reference

Workflow

Discover PR (if PR_NUMBER not provided):

gh pr list --head story/{STORY_ID} --state open --json number

• If no open PR found: WARNING "No open PR for story/{STORY_ID}. Skipping merge." Continue to step 4 (worktree cleanup).

Verify PR is mergeable - Check PR status:

gh pr view {PR_NUMBER} --json mergeable,state

• If not mergeable: WARNING, attempt merge anyway (GitHub will reject if truly unmergeable).

Squash-merge PR - Merge and delete remote branch:

gh pr merge {PR_NUMBER} --squash --delete-branch

• On success: record merge result.

• On failure: WARNING, continue to worktree cleanup.

Remove local worktree - Clean up the worktree directory:

git worktree remove tree/story/{STORY_ID}

• If fails (dirty tree): retry with --force

• If still fails: WARNING, continue.

Delete local branch - Remove the local branch reference:

git branch -D story/{STORY_ID}

• May already be gone from --delete-branch . Ignore errors.

Prune worktree metadata - Clean up stale references:

git worktree prune

Output

After completion, always report:

PR MERGED AND CLEANED UP story_id: {STORY_ID} pr_number: {number} merge_strategy: squash branch_deleted: true | false worktree_removed: true | false

If no PR was found:

WORKTREE CLEANED UP (NO PR) story_id: {STORY_ID} pr_number: none merge_strategy: skipped branch_deleted: true | false worktree_removed: true | false

This structured output allows the calling orchestrator to parse results for CHECKPOINT.yaml and status updates.

Error Handling

All failures are non-blocking — each step is independent and continues regardless of prior step outcomes.

Error Action

gh CLI not found WARNING: "GitHub CLI (gh) not found. Skipping PR merge. Worktree cleanup only."

No open PR found WARNING: Skip merge, proceed to worktree cleanup

PR merge fails WARNING: Log error, continue to worktree cleanup

Worktree remove fails WARNING: Retry with --force , log if still fails

Local branch delete fails WARNING: Branch may already be gone, ignore

Not authenticated WARNING: "gh auth required for PR merge. Skipping merge."

Notes

• All steps are non-blocking: a failure in any step does not prevent subsequent steps from executing

• Mirrors the fault-tolerance pattern from /wt:finish

• Squash merge produces a single clean commit on main

• --delete-branch handles remote branch deletion as part of the merge

• The worktree cleanup runs even if no PR exists (handles edge cases where PR was manually closed)

• The gh CLI must be installed and authenticated for PR operations