>>389505690
almost every single shader out there has comprehensive documentation that even brainlets can parse and understand, here are some examples in no particular order
https://github.com/unity3d-jp/UnityChanToonShaderVer2_Project/blob/release/legacy/2.0/Manual/ 
https://gitlab.com/s-ilent/SCSS/-/wikis/Manual/Setting-Overview
https://lilxyzw.github.io/lilToon/index.html#/en-us/
https://github.com/ACIIL/ACLS-Shader/wiki
https://suna.ooo/agenasulab/ss/