fix: make serverless use bare

Author: MasterPtato

packages/rivetkit/package.json

@@ -163,7 +163,7 @@
     "@bare-ts/lib": "~0.3.0",
     "@hono/standard-validator": "^0.1.3",
     "@hono/zod-openapi": "^0.19.10",
-    "@rivetkit/engine-runner": "https://pkg.pr.new/rivet-dev/engine/@rivetkit/engine-runner@f594631",
+    "@rivetkit/engine-runner": "https://pkg.pr.new/rivet-dev/engine/@rivetkit/engine-runner@03e3532",
     "@rivetkit/fast-json-patch": "^3.1.2",
     "cbor-x": "^1.6.0",
     "hono": "^4.7.0",

packages/rivetkit/src/drivers/engine/actor-driver.ts

@@ -382,9 +382,9 @@ export class EngineActorDriver implements ActorDriver {
 
 		return streamSSE(c, async (stream) => {
 			// Runner id should be set if the runner started
-			const runnerId = this.#runner.runnerId;
-			invariant(runnerId, "runnerId not set");
-			stream.writeSSE({ data: runnerId });
+			const payload = this.#runner.getServerlessInitPacket();
+			invariant(payload, "runnerId not set");
+			stream.writeSSE({ data: payload });
 
 			return this.#runnerStopped.promise;
 		});