Add docs/harness.md covering: - What a harness (installation directory) is - Directory structure with mayor/ config files - Town-level vs rig-level mayor presence - Beads architecture and resolution via BEADS_DIR - Relationship between harness and rigs - Example configurations and setup workflow 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>