Finishing a Development Branch

Integrate finished work: verify → detect environment → choose integration → execute → clean up.

Under [[no-staging-doctrine]] + [[main-only-branch]] the default is merge to main + auto-push — diffs clearing all gates auto-merge. Don't offer "keep the branch as-is, handle it later"; finish the work this turn. PR only when a human review is explicitly wanted.

Announce: "Using the finishing-a-development-branch skill to complete this work."

Step 1 — gate before integrating

• Run the project test suite. Failures block — show them, fix first, do NOT integrate broken code.
• Full deploy + prod-E2E gate is [[verification-loop]] — local green ≠ done.

Step 2 — detect environment

GIT_DIR=$(cd "$(git rev-parse --git-dir)" 2>/dev/null && pwd -P)
GIT_COMMON=$(cd "$(git rev-parse --git-common-dir)" 2>/dev/null && pwd -P)

• GIT_DIR == GIT_COMMON → normal repo, no worktree cleanup.
• GIT_DIR != GIT_COMMON, named branch → worktree, provenance-based cleanup (Step 4).
• Detached HEAD → externally managed; no local-merge, no cleanup (push-as-branch or discard only).
• Base branch: git merge-base HEAD main || git merge-base HEAD master, or confirm with the user.

Step 3 — integrate

• Merge to base (default). cd to main repo root first (CWD safety), merge, re-run tests on the merged result, then Step 4 cleanup, then git branch -d. Always auto-push the merged base.

  MAIN_ROOT=$(git -C "$(git rev-parse --git-common-dir)/.." rev-parse --show-toplevel); cd "$MAIN_ROOT"
  git checkout <base> && git pull && git merge <feature> && <test cmd> && git push
  

• PR (review wanted). git push -u origin <feature>. Do NOT clean up the worktree — it's needed to iterate on feedback.

• Discard (abandon). Require a typed discard confirmation listing branch + commits + worktree path. Then cd to main root, Step 4 cleanup, git branch -D <feature>.

Step 4 — cleanup (merge + discard only; PR preserves the worktree)

WORKTREE_PATH=$(git rev-parse --show-toplevel)

• Normal repo (GIT_DIR == GIT_COMMON) → nothing to remove.
• Worktree under .worktrees/ or worktrees/ → we own it. From main root (never from inside the worktree): git worktree remove "$WORKTREE_PATH" && git worktree prune.
• Anywhere else → harness-owned; use its exit tool (ExitWorktree) or leave in place. Never remove a worktree you didn't create.

Ordering invariants (why the sequence is fixed)

• Merge BEFORE removing the worktree — git branch -d fails while a worktree references the branch.
• cd to main root BEFORE git worktree remove — fails silently when CWD is inside the target.
• git worktree prune after removal self-heals stale registrations.

See

• [[no-staging-doctrine]] · [[main-only-branch]] · [[verification-loop]]
• using-git-worktrees — the isolation setup this finishes