Spring - MongoDB migrations (Mongock)

Apply Mongock migration guidelines for Spring Boot and Spring Data MongoDB.

What is covered in this Skill?

• Mongock BOM, Spring Boot runner, and Spring Data MongoDB driver coordinates
• mongock.migration-scan-package configuration and startup execution
• Code-first @ChangeUnit migrations with @Execution and rollback hooks
• Locking, idempotency, transaction limits, and forward-only rollout discipline
• Optional MongoDB-backed integration tests using only project-approved, pinned, or already-available container images when the user permits external runtime dependencies
• Coordination with @315-frameworks-spring-mongodb

Scope: Apply recommendations based on the reference rules and good/bad examples.

Constraints

Compile before Mongock or MongoDB migration changes; verify after changes.