tikz
Installation
SKILL.md
TikZ/PGF — Vector Graphics & Diagrams
CTAN: https://ctan.org/pkg/pgf
Manual: texdoc tikz (~1300 pages)
Setup
\usepackage{tikz}
% Load libraries as needed:
\usetikzlibrary{arrows.meta, calc, positioning, decorations.pathmorphing,
patterns, shapes.geometric, shapes.misc, fit, backgrounds,
automata, trees, mindmap, circuits.logic.US}