Unity csharp memory stripping

Skill meyverick/agy-skills/skills/unity-csharp-memory-stripping

A collection of elite, modular, and validated AI agent skills and system rules for Google Antigravity.

Install

npx -y skills add meyverick/agy-skills --skill unity-csharp-memory-stripping

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Optimizes C# script compilation for WebGL, reducing the size of the final compiled WebAssembly binary by minimizing heavy dependencies and GC allocations.

SKILL.md

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Unity C# Memory Stripping

This skill teaches how to write lightweight C# code that avoids compiling down to heavy WebAssembly instructions, strictly targeting WebGL playable ads.

Core Rules

YAGNI (You Aren't Gonna Need It): Do not use System.Reflection, dynamic generics, or LINQ. These force IL2CPP to generate thousands of lines of WebAssembly boilerplate.
Defensive Programming & GC Optimization: Avoid Garbage Collection (GC) spikes in Update(). Pre-allocate arrays and use struct-based Math (e.g., Unity's native Vector3 instead of complex custom classes).
Assembly Linker Configuration: Use a strict link.xml file to explicitly preserve only the necessary components while allowing aggressive stripping of the rest of the Unity engine assemblies.
Green Software Engineering: Reduced WASM payload sizes directly translate to faster loading times and lower energy consumption.

Reference Example

// Anti-Pattern (Heavy WebAssembly generated due to LINQ and dynamic allocation)
using System.Linq;

void Update() {
    var activeEnemies = allEnemies.Where(e => e.isActive).ToList();
    // Heavy GC allocation every frame
}

// Optimized Pattern (Lightweight WASM, zero GC allocation)
void Update() {
    for (int i = 0; i < allEnemies.Length; i++) {
        if (allEnemies[i].isActive) {
            // Process directly
        }
    }
}

Example link.xml to protect essential scripts while stripping others: