I Used AI Agents to Migrate 44 Angular Components. The Review Changed My Mind.

An engineer used AI to migrate 44 Angular components from Reactive Forms to Signal Forms, but a review revealed issues with validation. The transformation itself was successful, but the 'successful' outcome didn't guarantee equivalence. The engineer learned that AI scales transformation, but doesn't guarantee equivalence. To structure a large AI-assisted refactoring, the engineer suggests a staged approach, starting with a drop-in replacement with minimal blast radius, and then addressing edge cases and validation rules.