Side projects on side projects

LLMs are great with CLI tools—they can just --help and immediately understand what to do. CLI interfaces such as railway, vercel, gcloud, etc. give your coding agent the ability to manage these platforms for you. You don’t have to switch to a web UI and manually change things.

I’m working a lot with Langfuse. Langfuse doesn’t have a CLI yet, so I made one. I ported vicentereig’s unofficial client to Rust so it ran quicker, fixed a few issues I found, and added support for some missing functionality such as prompt management and eval creation.

I then created a Langfuse skill, and now Claude Code can manage my prompts.

Creating lf and the associated skill would have taken a significant amount of headspace before LLMs. It would be another side project on a someday list that might never have been realised. Now it’s borderline trivial to build such tooling.