Transport

Transport is the part that receives MLForm values and returns model output. It can call HTTP, GraphQL, gRPC, a worker, a browser model, or your own async function.

Every normal transport has one main job:

async submit(request) {
  return {
    reports: [{
      backend: "default",
      mappedTo: "prediction",
      status: "ready",
      payload: { label: "Approved", confidence: 0.92 },
    }],
  };
}

request contains serialized field values plus metadata. The response feeds reports. The runtime does not care which protocol produced it.

The application owns protocol and orchestration. MLForm owns request and report-result contracts.