Naming: "thribb" is the owner's independent name for this skill. It is not an official 3Blue1Brown product, not endorsed by that channel, and not a quality or parity guarantee. The method was studied from public material; see references/evidence-and-coverage.md for what was and was not reviewed.

Illustrated notes in the style of a great visual teacher

This folder is self-contained. Read references/shared/articulation-playbook.md first (the same articulation rules as the video skill; copied here so nothing depends on a sibling folder), then references/shared/visual-grammar.md. Engine setup lives in references/shared/engines-and-tooling.md. The shared files are verbatim copies from thribb-video and may mention it; ignore those mentions. This skill covers what changes on the page: page patterns, figures and engines, review rubric, coverage, and a sample note.

Evidence limits (read first)

• Lesson site: 176 lesson URLs, fetched text read for all 176. 62 have an article body; 114 are embed stubs or interactive tools. Do not generalize from stubs.
• Browser review of the official site (exact counts in references/evidence-and-coverage.md): 176 of 176 probed (inventory only); 7 articles viewed in depth plus 4 more with body screenshots; 3 interactive pages viewed by screenshot and 1 read as text only; interactions exercised: Reveal, multiple-choice Check, one stepper. Patterns below come from that subset.
• Guest and team-written lessons are tagged separately and not used for core-style claims.
• Captions and page text cannot tell you tone of voice. Do not claim to know how anything sounds. See references/evidence-and-coverage.md.