tui: go plan payg msg (#26248)

script/zen-limit-server.ts

@@ -0,0 +1,37 @@
+const retryAfterSeconds = 15 * 60
+
+// const response = {
+//   type: "error",
+//   error: {
+//     type: "FreeUsageLimitError",
+//     message: "Free usage exceeded, subscribe to Go https://opencode.ai/go",
+//   },
+//   metadata: {},
+// }
+
+const response = {
+  type: "error",
+  error: {
+    type: "GoUsageLimitError",
+    message: "Subscription quota exceeded. You can continue using free models.",
+  },
+  metadata: {
+    workspace: "wrk_01K6XGM22R6FM8JVABE9XDQXGH",
+    limit: "5 hour",
+    resetAt: retryAfterSeconds,
+  },
+}
+
+Bun.serve({
+  port: 4141,
+  fetch() {
+    return Response.json(response, {
+      status: 429,
+      headers: {
+        "retry-after": String(retryAfterSeconds),
+      },
+    })
+  },
+})
+
+console.log("Zen limit repro server listening on http://localhost:4141")