Proactive agent skill initial release:

- Gives AI agents guidelines to act proactively, anticipating needs and offering updates.
- Includes best practices for timely progress reports, alerts, and scheduled task checks.
- Details default proactive actions (e.g., cleaning files, updating docs) without waiting for prompts.
- Provides example responses contrasting passive and proactive behaviors.
- Emphasizes striking a balance between helpful initiative and not being intrusive.