Legend is designed for you - to work the way you do and to be the one place for all your productivity needs.

Not sure that’s actually useful for getting things done (what I love about GTD is super sharp edges between the categories and this seems really fuzzy by comparison) but it seems good for Zettelkasten or MEMEX type stuff.

OK so part of the setup is basically that you have an outline of phrases and each phrase is linked to all note entries that contain those phrases.