@lenso/bun-module

Author a Lenso vNext Module in Bun without implementing the Execution Adapter wire protocol. Generated Capability bindings provide typed Provider interfaces and bind*Provider functions; this package owns the Bun process handshake, bounded JSON-RPC server, cancellation, shutdown, and Runtime Failure mapping.

import { defineModule, serve } from "@lenso/bun-module";
import {
  bindGreetingProvider,
  type GreetingProvider,
} from "./generated/greeting.ts";

const provider: GreetingProvider = {
  async greet(_context, request) {
    return {
      ok: true,
      value: { message: `Hello, ${request.name}!` },
    };
  },
};

serve(defineModule({ providers: [bindGreetingProvider(provider)] }));

The initial public surface supports request Capabilities over the production JSON-RPC loopback wire. Framed stdio remains a conformance and benchmark wire, not an authoring surface. Stream and Event descriptors are rejected until their typed SDK sessions are available rather than silently exposing partial support.