learn.sh now installs skills in three layers:
1. mandatory (.mandatory) - all agents
2. role/position (role-skills.json) - based on ego-mgr fields
3. agent-specific (.skill-list) - optional per-agent extras
Deduplicated across layers. ego-mgr unavailable = graceful skip.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
