Overview

Contracts make AI behavior explicit, validated, and inspectable. They are JSON Schema documents attached to skill versions (variablesSchema, outputSchema) and tool versions (inputSchema, outputSchema).

Why contracts matter

• They define what inputs are allowed and what outputs are expected.
• They power runtime validation and surface errors early.
• They show up in run detail so you can explain failures.

Skill versions also track outputContractState (declared / undeclared) to indicate whether an output schema is formally declared.

See also

• Input Contracts
• Output Contracts
• Runtime Validation