diff --git a/web/hwlab-cloud-web/scripts/tasktree-native-service.ts b/web/hwlab-cloud-web/scripts/tasktree-native-service.ts
index 4c151254..ae05ef8a 100644
--- a/web/hwlab-cloud-web/scripts/tasktree-native-service.ts
+++ b/web/hwlab-cloud-web/scripts/tasktree-native-service.ts
@@ -79,6 +79,19 @@ if (action === "start") {
     console.log(JSON.stringify({ ok: true, action, status: "already-running", pid, logPath }));
     process.exit(0);
   }
+  const requiredEnvironment = ["TASKTREE_NATIVE_DATABASE_ENV_FILE", "TASKTREE_TEMPORAL_ADDRESS"] as const;
+  const missingEnvironment = requiredEnvironment.filter((key) => !process.env[key]?.trim());
+  if (missingEnvironment.length > 0) {
+    console.error(JSON.stringify({
+      ok: false,
+      action,
+      status: "preflight-failed",
+      error: "missing-required-environment",
+      missingEnvironment,
+      valuesPrinted: false
+    }));
+    process.exit(1);
+  }
   rmSync(pidPath, { force: true });
   const logFd = openSync(logPath, "a");
   const child = Bun.spawn([process.execPath, "scripts/tasktree-native-supervisor.ts"], {
@@ -91,6 +104,19 @@ if (action === "start") {
   });
   child.unref();
   await Bun.write(pidPath, `${child.pid}\n`);
+  await Bun.sleep(150);
+  if (!isRunning(child.pid)) {
+    rmSync(pidPath, { force: true });
+    console.error(JSON.stringify({
+      ok: false,
+      action,
+      status: "start-failed",
+      error: "supervisor-exited-before-ready",
+      logPath,
+      valuesPrinted: false
+    }));
+    process.exit(1);
+  }
   console.log(JSON.stringify({ ok: true, action, status: "started", pid: child.pid, logPath }));
 } else if (action === "stop") {
   if (!isRunning(pid)) {