Pricing
00
In productionProintermediateAI code review

The AI's launch file is missing a node

Add the node the LLM built but never returned in the description.

Pairs with Generating nodes, launch, URDF, and messages in Use AI efficiently with ROS 2. Read the concept first, then diagnose it here.

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Operator report

After launch, `robot_state_publisher` is absent from `ros2 node list`.

Ubuntu 24.04, ROS 2 Jazzy, rclpy/rclcpp, an LLM coding assistant + MCP

01

System boundary

Trace only the relevant path.

3 nodes
  1. 01build nodes→
  2. 02add to description→
  3. 03launchOUT
02

How this lab works

You diagnose it. No command list.

Open the repair workspace and gather your own evidence in a real terminal. No diagnostic commands are handed to you - finding the fault is the exercise. Stuck? Progressive hints unlock inside the workspace.

03

Verification

Pass more than the visible symptom.

4 checks
  • All nodes start
  • No extra node added
  • Hidden regression behavior
  • Root cause explanation