Athas

A lightweight open-source code editor with built-in chat

A lightweight, cross-platform open-source code editor with built-in chat, direct Jupyter notebook support, R Markdown previews and language highlighting, and local container/terminal workflows.

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releasePRIMARY2026-06-14

Athas adds .ipynb support with .Rmd previews and R syntax highlighting

Athas added direct .ipynb support, markdown previews for .Rmd, and syntax highlighting for .Rmd, .ipy, and .R. The release makes notebook and R-heavy workflows first-class inside the editor instead of requiring separate viewers.