Schema Evolution Governance

Overview

Use this skill to evolve shared schemas without breaking producers, consumers, or historical data integrity.

Scope Boundaries

• Use this skill when the task matches the trigger condition described in description.
• Do not use this skill when the primary task falls outside this skill's domain.

Shared References

• Compatibility window rules:
  • references/compatibility-window-rules.md

Templates And Assets

• Schema change plan template:
  • assets/schema-change-plan-template.md
• Schema compatibility checklist:
  • assets/schema-compatibility-checklist.md

Inputs To Gather

• Current schema and migration history.
• Producer/consumer dependency map.
• Data volume, retention, and rollback constraints.
• Release window and coordination limits.

Deliverables

• Compatibility-aware schema change plan.
• Phased migration sequence with checkpoints.
• Rollback and data-recovery readiness criteria.

Workflow

1. Define change impact in assets/schema-change-plan-template.md.
2. Apply compatibility rules from references/compatibility-window-rules.md.
3. Validate consumer migration sequence and cutover plan.
4. Verify rollback/data integrity with assets/schema-compatibility-checklist.md.
5. Publish execution ownership and residual risk log.

Quality Standard

• Compatibility impact is explicit and testable.
• Migration and rollback paths are both validated.
• Consumer coordination is planned before destructive changes.

Failure Conditions

• Stop when forward/backward compatibility is unverified.
• Stop when rollback or data recovery path is missing.
• Escalate when migration risk exceeds governance policy.