# Release Runbook (Atomic Cutover)

## Preconditions

- all prior phase gates complete
- signed release checklist
- rollback owner and communication owner assigned

## Cutover Sequence

1. freeze non-release writes and announce maintenance window
2. execute final backup snapshot
3. deploy release candidate build
4. run reset/reseed as planned for production state model
5. run post-deploy integrity and smoke checks
6. run mandatory critical-path E2E subset
7. publish completion and monitor

## Immediate Post-Cutover Checks

- auth and role gating paths
- transition mutation sanity
- assignment preview/execute path
- live cursor operations
- audience vote acceptance and dedupe
- reporting endpoint correctness

## Rollback Trigger Conditions

- integrity check failures
- critical mutation path failure
- unacceptable error-rate spike

## Rollback Plan (High Level)

- restore backup snapshot
- redeploy previous stable build
- validate critical-path smoke tests
- issue incident communication and postmortem schedule