Unity WebGL Optimization
/optimize-web
Optimizes Unity WebGL and WebGPU builds for smaller downloads and faster load.
- GitHub stars
- 1,118 (repository stars as of 2026-10-21)
- License
- Unity Companion License
- Last commit
- 2026/10/20
- By
- Unity Technologies
Part of
Unity Skills (official)
Unity's own collection of skills for AI coding agents: prompts, slash commands and tools built for Unity workflows.
Listed from the author's README. GameSkill has not run this end to end yet. Agent support and install steps are as documented by the author.
Install
npx skills add Unity-Technologies/skills --skill optimize-webInstalls only this skill. Add -a claude-code (puts it in .claude/skills/), -a codex or -a cursor (.agents/skills/) to choose the agent, and -g to install it for your user instead of the project.
Commands are copied from the project's README. Check the repository before running anything on your machine.
Install for a specific agent
| Agents | -a | Folder |
|---|---|---|
| Claude Code | claude-code | .claude/skills/ |
| Codex | codex | .agents/skills/ |
| Cursor | cursor | .agents/skills/ |
| Gemini CLI | gemini-cli | .agents/skills/ |
| GitHub Copilot | github-copilot | .agents/skills/ |
| OpenCode | opencode | .agents/skills/ |
| Windsurf | windsurf | .windsurf/skills/ |
Add -a <flag> to the command. These are project folders; add -g to install for your user account instead.
What you get
- Worked steps: Pre-Flight; Assess Current State; Understand Request; Web Build Optimization Workflow
- A verification step before the work is called done
- Bundled 3 supporting files the agent reads when needed
Good fit
- When a web build is too large or stutters, or the user asks about compression, stripping, shader variants, or web profiling
Try this prompt
My WebGL build is 80 MB and loads slowly. Make it smaller and faster.About this skill
Optimizes Unity WebGL and WebGPU builds for smaller downloads and faster load. Use when a web build is too large or stutters, or the user asks about compression, stripping, shader variants, or web profiling.
From the optimize-web SKILL.md in Unity-Technologies/skills.
What's inside
- Performance Notes
- Running C# in the Editor
- Passing C# to eval
- Reading the settings this skill audits
- Applying the settings
- Verify from disk, not from the objects you just wrote
- Pre-Flight
- Assess Current State
- Understand Request
- Web Build Optimization Workflow
Good to know
Maintained and published by Unity. Many skills drive the open Unity Editor through the Unity CLI instead of editing scene files by hand.
Requirements
- A Unity project
- Unity CLI (recommended: many skills drive the open Editor through it)
FAQ
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