diff --git a/src/client/swruntime.ts b/src/client/swruntime.ts
index aa4c64e..b983ecb 100644
--- a/src/client/swruntime.ts
+++ b/src/client/swruntime.ts
@@ -12,7 +12,12 @@ export class ScramjetServiceWorkerRuntime {
 			port.addEventListener("message", (event) => {
 				console.log("sw", event.data);
 				if ("scramjet$type" in event.data) {
-					handleMessage.call(this, client, event.data);
+					if (event.data.scramjet$type === "init") {
+						this.recvport = event.data.scramjet$port;
+						this.recvport.postMessage({ scramjet$type: "init" });
+					} else {
+						handleMessage.call(this, client, event.data);
+					}
 				}
 			});
 
@@ -20,7 +25,27 @@ export class ScramjetServiceWorkerRuntime {
 		};
 	}
 
-	hook() {}
+	hook() {
+		this.client.global.registration = {
+			// TODO IMPLEMENT SCOPES
+			scope: this.client.url.href,
+			active: {
+				scriptURL: this.client.url.href,
+				state: "activated",
+				onstatechange: null,
+				onerror: null,
+
+				postMessage: () => {},
+				addEventListener: () => {},
+				removeEventListener: () => {},
+				dispatchEvent: (_e: Event) => {},
+			},
+			unregister: async () => true,
+			update: async () => {},
+			installing: null,
+			waiting: null,
+		};
+	}
 }
 
 function handleMessage(
@@ -28,7 +53,6 @@ function handleMessage(
 	client: ScramjetClient,
 	data: MessageW2R
 ) {
-	if (data.scramjet$port) this.recvport = data.scramjet$port;
 	const port = this.recvport;
 	const type = data.scramjet$type;
 	const token = data.scramjet$token;
@@ -54,25 +78,35 @@ function handleMessage(
 			// TODO: clean up, maybe put into a class
 			const fakeFetchEvent: any = new Event("fetch");
 			fakeFetchEvent.request = fakeRequest;
-			fakeFetchEvent.respondWith = async (
-				response: Response | Promise<Response>
-			) => {
-				response = await response;
-				const message: MessageR2W = {
-					scramjet$type: "fetch",
-					scramjet$token: token,
-					scramjet$response: {
-						body: response.body,
-						headers: Array.from(response.headers.entries()),
-						status: response.status,
-						statusText: response.statusText,
-					},
-				};
+			let responded = false;
+			fakeFetchEvent.respondWith = (response: Response | Promise<Response>) => {
+				responded = true;
+				(async () => {
+					response = await response;
+					const message: MessageR2W = {
+						scramjet$type: "fetch",
+						scramjet$token: token,
+						scramjet$response: {
+							body: response.body,
+							headers: Array.from(response.headers.entries()),
+							status: response.status,
+							statusText: response.statusText,
+						},
+					};
 
-				port.postMessage(message, [response.body]);
+					dbg.log("sw", "responding", message);
+					port.postMessage(message, [response.body]);
+				})();
 			};
 
 			handler.proxiedCallback(trustEvent(fakeFetchEvent));
+			if (!responded) {
+				port.postMessage({
+					scramjet$type: "fetch",
+					scramjet$token: token,
+					scramjet$response: false,
+				});
+			}
 		}
 	}
 }
@@ -125,4 +159,4 @@ type MessageCommon = {
 
 export type MessageR2W = MessageCommon & MessageTypeR2W;
 export type MessageW2R = MessageCommon &
-	MessageTypeW2R & { scramjet$port: MessagePort | undefined };
+	MessageTypeW2R & { scramjet$port?: MessagePort };
diff --git a/src/shared/rewriters/worker.ts b/src/shared/rewriters/worker.ts
index 763a240..6bb10e3 100644
--- a/src/shared/rewriters/worker.ts
+++ b/src/shared/rewriters/worker.ts
@@ -1,6 +1,6 @@
 import { rewriteJs } from "./js";
 
-const clientscripts = ["wasm", "codecs", "shared", "client"];
+const clientscripts = ["wasm", "shared", "client"];
 export function rewriteWorkers(js: string | ArrayBuffer, origin?: URL) {
 	const dest = origin.searchParams.get("dest");
 	const type = origin.searchParams.get("type");
@@ -9,14 +9,20 @@ export function rewriteWorkers(js: string | ArrayBuffer, origin?: URL) {
 
 	let str = "";
 
-	str += `self.$scramjet = {}; self.$scramjet.config = ${JSON.stringify(self.$scramjet.config)};\n`;
+	str += `self.$scramjet = {}; self.$scramjet.config = ${JSON.stringify(self.$scramjet.config)};
+	`;
 	str += "";
 	if (type === "module") {
+		str += `import "${self.$scramjet.config["codecs"]}"
+self.$scramjet.codec = self.$scramjet.codecs[self.$scramjet.config.codec];
+`;
 		for (const script of clientscripts) {
-			console.log("Import", script, self.$scramjet);
 			str += `import "${self.$scramjet.config[script]}"\n`;
 		}
 	} else {
+		str += `importScripts("${self.$scramjet.config["codecs"]}");
+self.$scramjet.codec = self.$scramjet.codecs[self.$scramjet.config.codec];
+`;
 		for (const script of clientscripts) {
 			str += `importScripts("${self.$scramjet.config[script]}");\n`;
 		}
@@ -27,8 +33,6 @@ export function rewriteWorkers(js: string | ArrayBuffer, origin?: URL) {
 		rewritten = new TextDecoder().decode(rewritten);
 	}
 
-	str +=
-		"self.$scramjet.codec = self.$scramjet.codecs[self.$scramjet.config.codec];\n";
 	str += rewritten;
 
 	dbg.log("Rewrite", type, dest, str);
diff --git a/src/worker/fakesw.ts b/src/worker/fakesw.ts
index 236848d..1246066 100644
--- a/src/worker/fakesw.ts
+++ b/src/worker/fakesw.ts
@@ -4,7 +4,7 @@ export class FakeServiceWorker {
 	syncToken = 0;
 	promises: Record<number, (val?: MessageR2W) => void> = {};
 	messageChannel = new MessageChannel();
-	alreadytransfered = false;
+	connected = false;
 
 	constructor(
 		public handle: MessagePort,
@@ -12,10 +12,22 @@ export class FakeServiceWorker {
 	) {
 		this.messageChannel.port1.addEventListener("message", (event) => {
 			if ("scramjet$type" in event.data) {
-				this.handleMessage(event.data);
+				if (event.data.scramjet$type === "init") {
+					this.connected = true;
+				} else {
+					this.handleMessage(event.data);
+				}
 			}
 		});
 		this.messageChannel.port1.start();
+
+		this.handle.postMessage(
+			{
+				scramjet$type: "init",
+				scramjet$port: this.messageChannel.port2,
+			},
+			[this.messageChannel.port2]
+		);
 	}
 
 	handleMessage(data: MessageR2W) {
@@ -26,13 +38,12 @@ export class FakeServiceWorker {
 		}
 	}
 
-	async fetch(request: Request): Promise<Response> {
+	async fetch(request: Request): Promise<Response | false> {
 		const token = this.syncToken++;
 
 		const message: MessageW2R = {
 			scramjet$type: "fetch",
 			scramjet$token: token,
-			scramjet$port: !this.alreadytransfered && this.messageChannel.port2,
 			scramjet$request: {
 				url: request.url,
 				body: request.body,
@@ -43,12 +54,7 @@ export class FakeServiceWorker {
 			},
 		};
 
-		const transfer: any = request.body ? [request.body] : [];
-
-		if (!this.alreadytransfered) {
-			this.alreadytransfered = true;
-			transfer.push(this.messageChannel.port2);
-		}
+		const transfer = request.body ? [request.body] : [];
 
 		this.handle.postMessage(message, transfer);
 
@@ -56,6 +62,8 @@ export class FakeServiceWorker {
 			this.promises[token] = resolve;
 		})) as MessageR2W;
 
+		if (!r) return false;
+
 		return new Response(r.body, {
 			headers: r.headers,
 			status: r.status,
diff --git a/src/worker/fetch.ts b/src/worker/fetch.ts
index c696f91..14d0e78 100644
--- a/src/worker/fetch.ts
+++ b/src/worker/fetch.ts
@@ -51,9 +51,10 @@ export async function swfetch(
 			(w) => w.origin === url.origin
 		);
 
-		if (activeWorker) {
+		if (activeWorker && activeWorker.connected) {
 			// TODO: check scope
-			return await activeWorker.fetch(request);
+			const r = await activeWorker.fetch(request);
+			if (r) return r;
 		}
 		if (url.origin == new URL(request.url).origin) {
 			throw new Error(