# Deterministic fixtures and scenarios

`fixtures/scenarios/` defines failure and recovery behavior without touching the real server.

Codex must build a telemetry simulator/fake sources capable of:
- serving Prometheus-compatible query/metadata responses or a suitable deterministic adapter;
- exposing Unraid/inventory snapshots;
- emitting normalized events;
- changing source freshness;
- simulating service probe results;
- controlling time for alert tests;
- supporting browser end-to-end scenarios.

Every scenario must validate against `specs/simulator-scenario.schema.json`.

Production fault tests must use these fixtures or captured redacted read-only data. Never remove disks, degrade arrays, crash real containers or disrupt the network solely for testing.