Pluto is an AI harness. I started this project solely because I don't trust any of the AI harnesses nowadays, for various reasons. I never understood the TypeScript ones, although there are some good ones like ohmypi and pi.

Claude Code is a total mess that I don't want to deal with. It also doesn't support other models, it's closed source so you can't edit it, and it has useless features (at least for me). Also VERY slow.

Codex is probably the only one that I like in terms of code quality and usefulness, but again it supports only GPT models. That's fine, because you can basically edit it, but then you have to maintain a fork, which is not ideal if they keep pushing features that you don't use.

I wanted a simple thing with the features that I use and like from other AI harnesses, and I wanted to write it in a language that I "know", or at least make my best effort to learn.

Anyway, it's also a fun project for creating agents.

Install

curl -fsSL https://raw.githubusercontent.com/syrull/pluto/refs/heads/main/install.sh | sh

This downloads the latest release binary for your OS/arch into ~/.local/bin (override with PLUTO_INSTALL_DIR). Make sure that directory is on your PATH.

Update

Pluto updates itself in place to the latest release:

pluto update

Check the current version with pluto version.

Releases

Releases are published automatically from main. Every push bumps the patch version (starting at v0.0.1) and creates a tagged GitHub release with prebuilt binaries. Add [skip release] to a commit message to skip it.