# Mongo Removal Decisions · 2025-12-06

## Summary
All control-plane modules have cut over to PostgreSQL. No remaining import/backfill tooling requires Mongo storage projects. Decision: proceed with full removal of Mongo storage libraries, tests, solution references, dual-write wrappers, and Mongo configuration flags for the following modules: Scheduler, Notify, Policy, Concelier, Excititor, and shared Provenance.Mongo.

## Module Decisions
- **Scheduler**: Delete `StellaOps.Scheduler.Storage.Mongo` and related tests; Backfill now reads Postgres; no dual-write. Rollback: restore tag `scheduler-mongo-20251203` if needed.
- **Notify**: Delete `StellaOps.Notify.Storage.Mongo` and tests; Postgres-only in staging; import tooling now uses Postgres importers. Rollback: restore tag `notify-mongo-20251203`.
- **Policy**: Delete `StellaOps.Policy.Engine/Storage/Mongo`; packs/risk profiles migrated; no dual-write. Rollback: tag `policy-mongo-20251203`.
- **Concelier**: Delete `StellaOps.Concelier.Storage.Mongo` and tests; vulnerability importers run on Postgres; dual-import retired. Rollback: tag `concelier-mongo-20251203`.
- **Excititor**: Delete Mongo test harness; VEX/graph now Postgres-only; dual-run parity complete. Rollback: tag `excititor-mongo-20251203`.
- **Shared**: Delete `StellaOps.Provenance.Mongo` and any lingering references; provenance now Postgres-backed.

## Rollback Plan (common)
1) Revert deletion commit or cherry-pick rollback from tags above.
2) Restore solution references and re-enable Mongo configuration flags if needed.
3) Re-run module test suites with Mongo fixtures enabled.

## Owner Sign-offs (recorded by PM)
- Scheduler Guild: APPROVED (2025-12-06, slack-offline note)
- Notify Guild: APPROVED (2025-12-06, meeting log)
- Policy Guild: APPROVED (2025-12-06, email)
- Concelier Guild: APPROVED (2025-12-06, meeting log)
- Excititor Guild: APPROVED (2025-12-06, slack-offline note)
- Infrastructure Guild: APPROVED (2025-12-06)

## Next Steps
- Execute PG-T7.1.2–T7.1.6 deletions in Wave A, then update solutions/config and run full build (PG-T7.1.7–T7.1.10).