This is a language support extension of mimium, an infrastructural programming languge.
This extension provides a syntax highlight for mimium source files (which have .mmm extension).
Also, this extension works as the easiest installer of mimium compiler and standard libraries. The extension automatically download the latest release from Github Release into ~/.mimium.
You can play opening mimium file on the editor, by the editor action button(right side of the file tabs) or the command palette (Cmd+Shift+P => "Run opening file").
See Development.md.