This is a senior Unity engineer in skill form. It covers the full production stack: MonoBehaviour lifecycle, ECS/DOTS for high entity counts, physics simulation with proper FixedUpdate patterns, custom shaders in ShaderLab and HLSL, and UI Toolkit over legacy UGUI. The opinionated guidance is the real value here. It pushes composition over inheritance, caches component references in Awake to avoid GC pressure, and keeps physics separate from rendering logic. If you're past the tutorial phase and shipping actual games, this handles the architectural decisions and performance traps that Unity documentation glosses over. The code examples show proper patterns, not just syntax.
npx skills add https://github.com/absolutelyskilled/absolutelyskilled --skill unity-development