A2A UCP Message Envelope
Minimal A2A envelope shapes used by UCP's A2A checkout binding. This schema validates UCP's transport mapping points — Agent Card extension advertisement, inbound A2A Message requests, and JSON-RPC responses carrying A2A Message results — without attempting to re-specify the full A2A protocol.
Generated from: a2a_message.json
Summary
Functions
Casts params to one of the variant types.
Returns the variant modules for this union type.