main.ts

@@ -66,16 +66,14 @@ async function runSSE() {
     const url = new URL(req.url || "/", `http://${req.headers.host}`);
 
     if (req.method === "GET") {
-      const sessionId = crypto.randomUUID();
       const transport = new SSEServerTransport("/message", res);
-      transports.set(sessionId, transport);
-
-      res.on("close", () => {
-        transports.delete(sessionId);
-      });
-
       const server = buildServer();
       await server.connect(transport);
+
+      transports.set(transport.sessionId, transport);
+      res.on("close", () => {
+        transports.delete(transport.sessionId);
+      });
       return;
     }