# ImpactIndex Stub Removal Tracker

- **Created:** 2025-10-20
- **Owner:** Scheduler ImpactIndex Guild
- **Reference Task:** SCHED-IMPACT-16-300 (fixture-backed stub)

## Exit Reminder

Replace `FixtureImpactIndex` with the roaring bitmap-backed implementation once SCHED-IMPACT-16-301/302 are completed, then delete:

1. Stub classes (`FixtureImpactIndex`, `ImpactIndexStubOptions`, `ImpactIndexServiceCollectionExtensions`).
2. Embedded sample fixture wiring in `StellaOps.Scheduler.ImpactIndex.csproj`.
3. Temporary unit tests in `StellaOps.Scheduler.ImpactIndex.Tests`.

Remove this file when the production ImpactIndex replaces the stub.