migration-validator

# Migration Validator Skill Validates functional equivalence between source and target systems after migration through comprehensive comparison and behavioral verification. ## Purpose Enable migration validation for: - Side-by-side comparison - Output diffing - Behavioral verification - Data consistency checking - Acceptance criteria verification ## Capabilities ### 1. Side-by-Side Comparison - Run parallel requests - Compare responses - Track differences - Document discrepancies ### 2. Output Diffing - Compare API responses - Diff file outputs - Check data formats - Validate transformations ### 3. Behavioral Verification - Test user flows - Verify business logic - Check edge cases - Validate error handling ### 4. Data Consistency Checking - Compare data states - Verify calculations - Check relationships - Validate constraints ### 5. Integration Validation - Test external integrations - Verify API contracts - Check message flows - Validate events ### 6. Acceptance Criteria Verification - Check feature completeness - Verify requirements - Validate user stories - Document coverage ## Tool Integrations | Tool | Purpose | Integration Method | |------|---------|-------------------| | Diffy | Response comparison | API | | Contract testing | API verification | CLI | | Cypress | E2E validation | CLI | | Playwright | Browser testing | CLI | | Custom validators | Business rules | CLI | ## Output Schema ```json { "validationId": "string", "timestamp": "ISO8601", "sou...