---
name: calendar-sentinel
description: Monitor near-term calendar commitments, detect conflicts/risk windows, and produce concise actionable alerts. Use when users ask for schedule checks, next-24h scans, conflict detection, prep reminders, or proactive event watch behavior.
---

# Calendar Sentinel

## Monitoring goals

- Surface only schedule items that matter soon.
- Detect conflicts and unrealistic transitions.
- Provide practical prep reminders with lead time.

## Default scan windows

- Primary: next 24h
- Priority alert: next 2h
- Optional extension: next 48h when explicitly requested

## Detection rules

Flag events when any condition is true:

1. Time overlap between two commitments.
2. Back-to-back events with insufficient transition buffer.
3. Missing critical event metadata (time/location/link) close to start.
4. High-importance event starts soon and no prep reminder has been surfaced.

## Alert policy

- Keep alerts compact and actionable.
- Batch related items into one update.
- Avoid repeated alerts unless state changed or event entered a tighter window.

## Output template

Follow shared convention: `skills/_shared/briefing-conventions.md`

- **Now (<2h):** immediate events and blockers
- **Today (24h):** upcoming commitments and conflicts
- **Risks:** overlap | travel buffer | missing details
- **Next actions (1-3):** exact steps to de-risk schedule

## Noise controls

- If no conflicts/urgent events, return a brief all-clear.
- Suppress duplicate reminders in short intervals.
- Prefer one high-signal reminder over many low-signal pings.