- Add MIT LICENSE file
- Add CONTRIBUTING.md with skill creation guide
- Add AGENTS.md and CLAUDE.md for AI agent guidelines
- Add issue template for skill requests
- Add PR templates for new skills, updates, and docs
- Update README with links to contributing guide and license
- Add sync-claude-plugin workflow to auto-update marketplace.json when skills change
- Add validate-skill workflow to validate SKILL.md files on push/PR
- Add sync-marketplace.js script for skill discovery and count updates