- Add POST/GET /skill-registry/skills/:sourceId/:slug/ratings routes
- Import skillRatingService in skill-registry routes
- Add upsertCommunityRatingsStub() in fetcher, called after each skill upsert
- Import communityRatings from schema in fetcher
- Update list() and getById() in skill-registry.ts to LEFT JOIN communityRatings
- Include averageRating, ratingCount, taskCount, avgCostUsd, lastUsedAt in SkillListItem
- Add agentSkills usage aggregation via LEFT JOIN + SUM/AVG/MAX
- Add fire-and-forget recordUsageForAgent call in heartbeat after finalizeAgentStatus
- Dynamic import keeps skill-registry-ratings off critical startup path
- All 44 skill-registry tests pass, full server suite (536) green
- install() copies cached files to agent .claude/skills/<slug>/ dir
- install() returns pending_plugin_install for skills with file kind=plugin
- uninstall() soft-deletes via removed_at timestamp
- rollback() restores prior version from cache and updates active_version_id
- list() filters soft-deleted by default; includeRemoved=true returns all
- fetchAll() delegates to fetchAllSources for multi-source refresh