must

Task runners like Make and Just describe commands but share nothing across languages; Bazel-scale systems define the whole world. must sits between them: one binary, one Mustfile.toml, and consistent verbs — must build, must test, must outdated — backed by roughly forty recipe types spanning Rust, Go, C/C++, TypeScript, Python, Zig, Docker, and more.

Content-hash caching skips unchanged work, cross-compilation and env interpolation are first-class, Lua plugins extend the core, and existing Makefiles import directly. The project builds itself with its own Mustfile.