What's new
Adds `SKILL.md` at the repo root so the skills.sh website can render the skill page correctly. The skills.sh CLI (`npx skills add ...`) already worked because it walks the repo with full-depth discovery, but the public website scraper only looks at the repo root or `skills//SKILL.md`. Without a root file, the public skill page showed "No SKILL.md available."
The new root SKILL.md is a short discoverability surface — YAML frontmatter (name + description), install commands for both skills.sh CLI and Claude Code plugin marketplace, quickstart, five-core-mechanics summary, slash command table, and a pointer to the full content at `plugins/multi-agent-coordination/skills/multi-agent-coordination/`. The plugin folder remains canonical.
Upgrade
```
/plugin marketplace update multi-agent-coordination
/plugin update multi-agent-coordination
```
Or via skills.sh:
```
npx skills update multi-agent-coordination
```