The lesson
Publish your product philosophy as a numbered table of contents of verbs, and let the product come second.
A huge serif "Practices for building" headline sits above a pale outline of two overlapping circles with a hatched overlap, on a near-black page. Below is a numbered index in groups: Introduction, Direction with items like "Set useful goals", and Building with items like "Write issues not user stories" and "Build in public", numbered 1.1 to 3.6.
Don't copy Linear's principles or its dark editorial look. Keep the practice of writing your actual operating beliefs as short imperative titles in a numbered list.