- Create .claude-plugin/marketplace.json at repo root
- Register orch as first dual-publish plugin
- Update emes-conversion-guide.md to explain dual-publish pattern
- Cross-agent support (Gemini, OpenCode) via Nix
- Claude plugin system for hooks and /plugin install UX
Part of skills-6x1 (emes plugin architecture epic)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
