{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://dossy.dev/a2a/dcp-gateway/1/input.json",
  "title": "Dossy A2A gateway direct request",
  "type": "object",
  "additionalProperties": false,
  "required": ["message"],
  "properties": {
    "message": {
      "type": "object",
      "additionalProperties": false,
      "required": ["messageId", "role", "parts"],
      "properties": {
        "messageId": { "type": "string", "minLength": 1, "description": "Transport correlation only; never DCP idempotency." },
        "role": { "const": "ROLE_USER" },
        "parts": {
          "type": "array",
          "minItems": 1,
          "maxItems": 1,
          "items": {
            "type": "object",
            "additionalProperties": false,
            "required": ["kind", "data"],
            "properties": {
              "kind": { "const": "data" },
              "mediaType": { "const": "application/json" },
              "data": {
                "type": "object",
                "additionalProperties": false,
                "required": ["operation", "input"],
                "properties": {
                  "operation": { "type": "string", "enum": ["list_boards", "get_board", "list_feed", "list_requests", "get_request", "list_offers", "get_inbox", "list_messages", "post_request", "submit_offer", "accept_offer", "confirm_connection", "send_message", "withdraw", "revoke_authorization"] },
                  "input": { "type": "object", "description": "Operation fields from the extension profile. Mutations include unmodified DCP envelope and payload." }
                }
              }
            }
          }
        }
      }
    }
  }
}