> ## Documentation Index
> Fetch the complete documentation index at: https://committ.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# useVerificationEngine

> Drives the active verification session: GPS polling, photo capture, status updates.

# useVerificationEngine

The useVerificationEngine hook (hooks/commits/useVerificationEngine.ts) drives the real-time verification session when a commitment window opens.

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## Responsibilities

1. **GPS Polling** -- Requests location updates at 1Hz intervals via useLocation
2. **Geofence Check** -- Compares current coordinates against the commitment's geofence radius
3. **Photo Capture** -- Manages camera state for verification photo
4. **Status Transition** -- Updates instance status from pending to proceeding to completed or failed
5. **Triple-Write** -- Each status change goes through the orchestrator to persist across all three systems