Create Worktree

Creates a git worktree so the user can work on a separate branch in parallel without disturbing their current working directory.

Current State

Current directory: !pwd

Current branch: !git branch --show-current

Worktree list: !git worktree list

Git root: !git rev-parse --show-toplevel

Git common dir: !git rev-parse --git-common-dir

Workflow

Step 1: Determine the Branch

Check for project branch naming conventions by scanning CLAUDE.md, CONTRIBUTING.md, or similar project docs for branch naming policies. If a convention exists, follow it. If not, use bare <short-name> without prefix segments (no feat/, fix/, etc.).

Determine the branch based on current state:

• On main/master, or already in a worktree: Infer the scope of work from conversation context or the provided argument. Create a new branch name from that. Do not ask the user unless the scope is genuinely unclear.
• On a non-main branch, not in a worktree: Ask the user:
  1. Whether to move this branch to the worktree, or create a new branch
  2. Whether to branch off the current branch or off main

If the user provided an argument, use it to determine or influence the branch name.

Step 2: Determine the Worktree Location

Determine the parent directory for the worktree:

• If already in a worktree: Place the new worktree in the same parent directory as the current worktree (a sibling directory).
• If in the primary clone directory: Place it at <repo-parent>/worktrees/<dir-name>, where <repo-parent> is the directory containing the repository root.

Directory naming rules:

• If the branch name is a single segment (e.g., implement-login), use it as the directory name
• If the branch name has a prefix segment (e.g., feat/implement-login), use only the final segment (implement-login)
• If the directory already exists, append a numeric suffix (e.g., implement-login-2)

Before creating, verify the target directory does not already exist with ls.

Step 3: Create the Worktree

1. Create the worktree with:

   git worktree add <path> -b <branch-name>
   

   Or if the branch already exists:

   git worktree add <path> <branch-name>
   

   git worktree add creates intermediate directories automatically.

2. Verify creation:

   git worktree list
   

Step 4: Report to User

Tell the user:

• The full path to the new worktree
• The branch name
• How to navigate to it (e.g., cd <path>)
• Remind them they can open it in a new editor window

Guidelines

• Prefer acting autonomously over asking questions. Only ask when genuinely ambiguous.
• Multiple projects may share the same worktrees/ directory -- this is expected.
• The worktree directory name and branch name may differ (e.g., branch feat/login in directory worktrees/login).
• Never create a worktree inside the current repository.