# [ANN] tricorder - a new development tool for Haskell and LLMs > Source: > Published: 2026-06-05 13:00:10+00:00 Hey everyone, for those of you who don’t know me, my name is Christian and I’m an engineer at Tweag. I am very pleased to announce the very first release of [tricorder](https://github.com/atelier-hub/tricorder)! `tricorder` has been my daily driver for Haskell development for months now. It works really well as a standalone replacement for `ghcid` or `ghciwatch` with some features that make it very attractive: However, it really shines when pair programming with an LLM agent. The included CLI surfaces build information in a way that is context-aware and reliable, so the feedback loop is very tight: `tricorder status –wait` will wait until the build cycle it and return diagnostis - warnings, errors, test results.`tricorder status –expand N` zooms in on a specific diagnostic whenever more information is needed.`tricorder source Dependency.ModuleName#functionName` will attempt to retrieve the source code for a specific function so the agent can verify APIs instead of hallucinating them. Omitting the `#functionName` will return the entire contents of the module.The CLI is mostly for agents to consume, though, with the familiar TUI being the dashboard for developers. A picture is worth a thousand words, so here’s a moving one, quickly demonstrating the TUI and using `tricorder` with an agent (invoking the included `/tricorder` skill): Please check the README for installation instructions. (Discourse won’t let me post more links) Tricorder is fully built in Haskell using the [atelier](https://hackage.haskell.org/package/atelier-core-0.1.0.0) toolkit, which was extracted from a project I built at Tweag since my colleagues and I liked the structure and ergonomics of algebraic effects so much. I’m looking forward to hacking on `tricorder` with more people in person tomorrow at ZuriHac and welcome any and all feedback! Special thanks to Victor Bakke who’s been my sparring partner (and the other maintainer of `tricorder` /`atelier` ) and Aleksandr Vershilov for supporting the project on Tweag’s side!