built callcheck, validates ai tool call responses against a schema and auto repairs the ones that fail before an agent acts on them.
→ zod based validation, no new schema language
→ repair loop sends errors back to a model, retries up to a limit
→ wrap a tool once, every call after is protected
→ free repair calls through ai gateway, no separate subscription
→ cli and npm package, same core
would love feedback, especially on the repair prompt and retry strategy