Help tool authors evolve a callable interface while existing agents still hold old argument shapes. Compare a documented subset of before-and-after schemas, generate counterexamples for required fields and narrowed values, and replay saved calls through both validators. Export a compatibility report and reviewable migration fixtures for CI.
Proposed milestones
- Load versioned tool contracts and saved calls
- Classify supported schema changes
- Generate and replay breaking-call counterexamples
- Export migration fixtures and a compatibility gate
This is an upstream project brief; an implementation and completion tests are not supplied.