Implements the gt worktree <rig> command that allows crew workers to
create worktrees in other rigs for cross-rig work while maintaining
their identity.
Features:
- Detects crew identity from cwd (requires crew/ directory)
- Creates worktree at <target-rig>/crew/<source-rig>-<name>/
- Sets up git config for identity preservation
- Handles edge cases: already exists, rig not found, wrong role
Usage: gt worktree beads (from gastown/crew/joe → beads/crew/gastown-joe/)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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