Show HN: AI tutors for Python, Ruby, and JavaScript powered by my personal notes (github.com)

Live demos (also linked at the top of the repo):

- https://joecardoso.dev/brush-up-py

- https://joecardoso.dev/brush-up-rb

- https://joecardoso.dev/brush-up-js

The retrieval engine, although simple, sparks some interesting ideas, e.g.: what if instead of Zettelkasten notes you had summaries of codebase sections, and instead of [[wikilinks]] you had signposts to architectural dependencies? Graph traversal over a codebase map could be a way to help agents navigate large repos while keeping context window usage deliberate and bounded.