Superpowers: Using Git Worktrees (Crush Adaptation)

Based on obra/superpowers using-git-worktrees skill. (MIT)
Upstream reference: skills/using-git-worktrees/SKILL.md

Directory priority

1. •.worktrees/ if exists (preferred)
2. •worktrees/ if exists
3. •If neither exists: check CLAUDE.md / project docs for preference; otherwise ask user.

Safety check (mandatory for project-local worktrees)

Verify worktree directory is ignored:

git check-ignore -q .worktrees 2>/dev/null || git check-ignore -q worktrees 2>/dev/null

If not ignored: add to .gitignore, commit, then proceed.

Create worktree (example)

BRANCH_NAME="feature/<name>"
git worktree add ".worktrees/$BRANCH_NAME" -b "$BRANCH_NAME"
cd ".worktrees/$BRANCH_NAME"

Baseline verification

Auto-detect setup (npm/cargo/poetry/go) then run the test suite. If baseline tests fail: report and ask whether to proceed or investigate first.