Pricing
00
In productionProbeginnerReliability

The AI's recovery replays the action

Make the AI-assisted task idempotent so a retry doesn't replay it.

Pairs with Ship an AI-assisted ROS system in Use AI efficiently with ROS 2. Read the concept first, then diagnose it here.

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Operator report

After a lost acknowledgement, the task runs its side effect twice.

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

01

System boundary

Trace only the relevant path.

3 nodes
  1. 01side effect→
  2. 02idempotency key→
  3. 03retryOUT
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
  • Side effect runs once
  • Retry is safe
  • Hidden regression behavior
  • Root cause explanation