Show HN: Langy, an automated AI engineer (we gave it a robot body) [video]

Founder here. Langy is an AI engineer that lives inside our platform, LangWatch. It reads your production traces, writes Scenario tests and evaluations for the problems it finds, opens a pull request on your repo, and proves the fix by running those simulations in CI. A human still merges.

Reachy robot from Hugging Face arrived on the same week we were planing on launching it, so we wanted to use for the launch. So we it wired to our Langy which actually lives on the platform, and asked it to test our own customer-support voice agent. On the video you can see it writing the agent tests reading traces and everything.

LangWatch is an open source platform (github.com/langwatch/langwatch) and Scenario, the simulation-testing library it drives, is open source too if you want to run that part yourself: https://github.com/langwatch/scenario. A full write-up on how Langy works under the hood is coming later this week.

Happy to get into how it drives the robot, what is real vs staged, latency, or how the whole harness around it actually works.