Any notes online you think are so perfectly written you'd put them into your vault without changing a thing?

Any notes online you think are so perfectly written you’d put them into your note vault without changing a thing?

Share a link here, can be from any subject or knowledge area. Like a summary notes for some math topic, or an analysis for a book.

Example: https://jvns.ca/blog/2024/01/26/inside-git/