# FixtureUpdater Tests Charter

## Mission
Validate fixture updater determinism and error handling for Concelier fixture refresh tooling.

## Responsibilities
- Maintain unit tests for FixtureUpdaterRunner and CLI behaviors.
- Keep fixtures deterministic and offline-friendly.
- Track sprint tasks in `TASKS.md` and update the sprint tracker.

## Key Paths
- `FixtureUpdaterRunnerTests.cs`

## Required Reading
- `docs/modules/concelier/architecture.md`
- `docs/implplan/permament/SPRINT_20251229_049_BE_csproj_audit_maint_tests.md`

## Working Agreement
- 1. Keep tests deterministic (fixed time and IDs, no network).
- 2. Avoid writing outside temp test directories.
- 3. Update `TASKS.md` and sprint statuses when work changes.