languages

decided once here so it doesn't get relitigated every module.

boot + core: rust

pid 1 is the one place a bug takes the whole machine down with it. memory safety matters more here than anywhere else, and rust gives that without a garbage collector, so it's still a real fit for init and launcher work.

modules, default: c

matches dwm, st, dmenu, the kernel itself, every real init that came before this one. text editor, RE tool, anything that should feel at home next to suckless tools, it's c unless there's a specific reason otherwise.

networking / security modules: go

wrong fit for boot, wrong fit for most modules, right fit here. static binaries, fast to write, easy to ship and cross compile.

asm

inside modules, never as a whole module. hot loop in a renderer, a perf critical path. spice, not the meal.

the manifest doesn't care

lunix.toml just points at an executable. this page is a style decision for consistency, not something enforced in code.