Primitives available in the Mu computer when running without an OS: https://github.com/akkartik/mu/blob/main/vocabulary.md
Primitives available when running on Linux: https://github.com/akkartik/mu/blob/main/linux/vocabulary.md
For starters I focused just on making things more discoverable. These files are optimized for opening in your text editor, jumping to definitions to see type signatures, etc. See https://github.com/akkartik/mu/blob/main/editor/exuberant_ctags_rc for a ctags configuration for Mu and SubX programs.
Main project page: https://github.com/akkartik/mu
This post is part of my Freewheeling Apps Devlog.
Comments gratefully appreciated. Please send them to me by any method of your choice and I'll include them here.