Initial release of the agent-oversight skill, providing robust monitoring and management for AI sub-agents.

- Monitors active, idle, and hung agent sessions.
- Coordinates file edits to prevent conflicts between agents.
- Automatically kills sessions hung for more than 5 minutes.
- Logs all failures to learnings.md for review and continuous improvement.
- Enforces coordination rules: read before editing, require exact text matches, one agent per file, and detailed failure tracking.