## ADDED Requirements

### Requirement: Migration Gates SHALL Define Cutover Readiness
The system SHALL define explicit migration gates for functional parity, build integrity, and operational health before final cutover.

#### Scenario: Gate evaluation before cutover
- **WHEN** release is prepared for final cutover
- **THEN** all required migration gates MUST pass or cutover SHALL be blocked

### Requirement: Rollout and Rollback Procedures MUST be Actionable
The system SHALL document actionable rollout and rollback procedures for root migration.

#### Scenario: Rollback execution
- **WHEN** post-cutover validation fails critical checks
- **THEN** operators MUST be able to execute documented rollback steps to restore previous stable behavior
