Languages

Built-in

LangREPLKernel typerat install installs
pyIPythonbuilt-in (JSON)ipython, jedi into venv
shbashbuilt-in (PTY)nothing
rR consolegeneric (JSON)jsonlite
pipi agentgeneric (tmux)@earendil-works/pi-coding-agent

Adding more

Any language can be added via custom runtimes. Drop a runtime.yaml and a kernel script in ~/.config/rat/runtimes/<lang>/.

Julia and Node.js are in progress.