Project-2 baseline

worker-toolkit-potion-polyglot/explore/instance.js

@@ -177,6 +177,12 @@ async function create(name) {
   // so a collision would silently point the client's livereload at the other container.
   if (ports.livereloadHost)
     env.EXPLORE_LIVERELOAD_PORT = String(await freePort(ports.livereloadHost + 10));
+  // Above clientPort, not just near its own base: freePort releases each probe before it
+  // resolves, so two independent calls can hand back the same number.
+  if (ports.companionHost)
+    env.EXPLORE_COMPANION_PORT = String(
+      await freePort(Math.max(Number(ports.companionHost) + 10, clientPort + 1))
+    );
   up(name, env);
   reportUp(name, tk);
 }