Add EnsureGitignorePatterns to rig package that ensures .gitignore
has required Gas Town patterns (.runtime/, .claude/, .beads/, .logs/).
Called from crew and polecat managers when creating new workers.
This prevents runtime-gitignore warnings from gt doctor.
The function:
- Creates .gitignore if it doesn't exist
- Appends missing patterns to existing files
- Recognizes pattern variants (.runtime vs .runtime/)
- Adds "# Gas Town" header when appending
Includes comprehensive tests for all scenarios.
Two improvements:
1. gt crew start now infers rig from cwd when first arg is not a valid
rig name (gt-czltv). Previously, running `gt crew start bob` from
within a rig directory would fail because "bob" was treated as the
rig name. Now it checks if the arg is a valid rig first.
2. Refactored copyOverlay to shared rig.CopyOverlay utility:
- Eliminates code duplication between crew and polecat managers
- Preserves source file permissions instead of hardcoding 0644
- Follows PR #278 improvements
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
