Function runTraced

apps/cloud/src/mcp/agent-handler.ts:143–153

(request: Request, program: Effect.Effect<A>)

// (via Effect.currentParentSpan) ferry that same trace into the session DO
// instead of letting the DO start a fresh root per request.
const runTraced = <A>(request: Request, program: Effect.Effect<A>): Promise<A> => {
  const parsed = parseTraceparent(
    request.headers.get("traceparent"),
    request.headers.get("tracestate"),
  );
  return Effect.runPromise(
    (parsed ? OtelTracer.withSpanContext(program, parsed) : program).pipe(
      Effect.provide(WorkerTelemetryLive),
    ),
  );
};

// The MCP resource the request targets. `server.ts` routes both the bare `/mcp`
// and `/mcp/toolkits/<slug>` to this handler (`prepareMcpOrgScope` strips the org