Protocol.connect() can automatically call Transport.start()

src/shared/protocol.ts

@@ -83,7 +83,7 @@ export class Protocol<
   }
 
   /**
-   * Attaches to the given transport and starts listening for messages.
+   * Attaches to the given transport, starts it, and starts listening for messages.
    *
    * The Protocol object assumes ownership of the Transport, replacing any callbacks that have already been set, and expects that it is the only user of the Transport instance going forward.
    */
@@ -106,6 +106,8 @@ export class Protocol<
         this._onnotification(message);
       }
     };
+
+    await this._transport.start();
   }
 
   private _onclose(): void {

src/shared/transport.ts

@@ -8,6 +8,8 @@ export interface Transport {
    * Starts processing messages on the transport, including any connection steps that might need to be taken.
    *
    * This method should only be called after callbacks are installed, or else messages may be lost.
+   *
+   * NOTE: This method should not be called explicitly when using Client, Server, or Protocol classes, as they will implicitly call start().
    */
   start(): Promise<void>;