# Mongo Removal Plan — Phase 7 (Scheduler, Notify, Policy, Concelier, Excititor)

## Purpose
Provide a phased, module-by-module plan to delete remaining Mongo storage/projects and unblock PG-T7.1.2–T7.1.6. Each plan includes replacements, sequencing, test strategy, and rollback.

## Global guardrails
- No dual-write: switch callers to Postgres equivalents first, then delete Mongo projects.
- Determinism: reuse existing ordered queries; ensure migrations are idempotent and timestamps are UTC.
- Tests: add Postgres-backed unit/integration slices before removing Mongo tests; keep fixtures deterministic.
- Rollback: retain Mongo projects on a feature branch until each module’s Postgres tests are green.

## Scheduler (PG-T7.1.2)
1) Replace repos:
   - Implement Postgres `IGraphJobStore`, `IOverlayStore`, `IPolicyRunStore` (schema per `docs/db/reports/scheduler-graphjobs-postgres-plan.md`).
   - Wire DI in WebService/Worker/Backfill to Postgres stores only.
2) Delete Mongo refs:
   - Remove `StellaOps.Scheduler.Storage.Mongo` project and package refs from csproj/solutions.
   - Drop Mongo options/session code paths.
3) Tests:
   - Add Postgres integration fixtures for graph jobs and overlays.
   - Update Backfill tests to use Postgres schema/data.
4) Rollback:
   - Keep Mongo project on a branch; if Postgres regression is found, revert DI to Mongo and re-run tests.

## Notify (PG-T7.1.3)
1) Inventory usages in import/backfill hooks; create Postgres equivalents for notification state and history.
2) Switch DI to Postgres stores; add migrations for notification messages/outbox.
3) Update tests to Postgres fixtures; remove Mongo helpers.
4) Delete `StellaOps.Notify.Storage.Mongo` project and solution entries.

## Policy (PG-T7.1.4)
1) Add Postgres storage for any remaining policy documents relying on Mongo (check registries/legacy surfaces).
2) Ensure migrations exist and are applied; switch DI to Postgres stores.
3) Update tests to Postgres fixtures; remove Mongo mocks.
4) Delete `StellaOps.Policy.Storage.Mongo` project and solution references.

## Concelier (PG-T7.1.5)
1) Finish Postgres document/raw storage + state repositories (tasks T7.1.5a/b); wire all connectors/exporters/tests to Postgres (T7.1.5c/d).
2) Add migrations for document/state/export tables and include in offline kit.
3) Remove Mongo packages, `StellaOps.Concelier.Storage.Mongo` project, solution references (T7.1.5e).
4) Tests: Postgres-backed connector/exporter tests; replace Mongo fixtures with deterministic Postgres fixtures.

## Excititor (PG-T7.1.6)
1) Identify Mongo test harness references in Excititor; add Postgres test harness equivalents.
2) Switch any lingering storage abstractions to Postgres (if any remain); otherwise drop Mongo-only test helpers.
3) Remove `StellaOps.Excititor.Storage.Mongo` project and solution entries.
4) Tests: run WebService/Core/Worker tests with Postgres harness; replace Mongo fixtures.

## Promotion & cleanup
- After each module’s tests are green, delete the corresponding Mongo project and solution entries in a single PR per module.
- Update module AGENTS.md to remove Mongo references and point to Postgres fixtures.
- Add Execution Log entries in `SPRINT_3407_0001_0001_postgres_cleanup.md` as each module switches to TODO/DOING with this plan.

## Owners
- Scheduler: Scheduler Guild
- Notify: Notify Guild
- Policy: Policy Guild
- Concelier: Concelier Guild
- Excititor: Excititor Guild
- Coordination: Infrastructure Guild