# Shared Package

Purpose: shared domain types and pure logic.

Implement here:

- domain types,
- profile thresholds,
- segment scoring,
- route scoring,
- critical gap detection,
- stage helper functions,
- GPX serialization helpers if shared with API.

Pure functions should have unit tests and deterministic fixtures.

## Implemented functions

- `scoreSegment(segment, profile)`
- `scoreRoute(route, profile)`
- `estimateHikeABikeRisk(segment, profile)`
- `filterPoisByCorridor(pois, route, filter)`
- `detectCriticalGaps(route, pois, thresholds)`
- `planStages(route, pois, tripRequest)`
- `exportRouteToGpx(route, stages, pois, options)`
- `createOfflinePackManifest(input)`

The mock trip request is kept aligned with `examples/sample_trip_request.json`; tests cover scoring, staging, POI corridor/gaps, and GPX export.