matterjs

MengTo/Skills · Agent Skill

Use when building physics-driven interactions and layout behaviors with Matter.js.

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Overview

PublisherMengToCommunity
RepositoryMengTo/Skills ↗
Skill foldermatterjs
Stars7,038
Forks819
Bundled files4
LicenseMIT
Last updatedOctober 25, 2026
LinksSkill source ↗ · Repository ↗

Mozgi check

What we found in the skill files. Details come with a subscription.

Security
low risk · no obvious risks found — the full report shows the details
Compatibility
instructions only — works with most agents
Similar skills
58 similar skills found
Also with subscription

Installation

A skill is a folder with a SKILL.md file. Pick your agent and run the commands in a terminal (macOS, Linux or Git Bash on Windows) from your project root.

Copy the prompt into Claude, Codex or another assistant: it will review the skill and install it for you.

Install the “matterjs” skill from mozgi.io (https://mozgi.io/skills/mengto-matterjs/) for me.

1. Download the archive: https://mozgi.io/skills/mengto-matterjs/download
   If it fails, take the skill folder from the source: https://github.com/MengTo/Skills/tree/main/agent-skills/web-design/matterjs
2. Read SKILL.md and the other files. Check the skill is safe: no hidden commands, no sending data elsewhere, no scripts doing something other than described. If anything looks suspicious, stop and tell me.
3. Put the “matterjs” folder into your agent's skills folder: .claude/skills/ for Claude Code, .agents/skills/ for Codex, .cursor/skills/ for Cursor, .gemini/skills/ for Gemini CLI. Inside the project if we are in one, otherwise in the home folder (~/.claude/skills/ etc.).
4. Make sure <skills folder>/matterjs/SKILL.md exists.
5. Briefly tell me what this skill does and offer to try it on my task.

If you cannot do a step yourself, tell me what to click or type.

Review the source files

4 files Download Zip

Read SKILL.md and any companion files before deciding whether to install. Click a file to preview it.

SKILL.md contents

Original author text · read-only

Matter.js Skill

Workflow

1. Confirm environment (plain HTML, React, or canvas-only) and rendering approach (Matter.Render for debug vs custom renderer).

2. Provide a minimal Engine/World/Render/Runner setup and add bodies.

3. Add interactions (mouse constraint) or constraints only if requested.

4. Share cleanup steps for SPA or teardown scenarios.

Minimal setup

<script>
  const { Engine, Render, Runner, Bodies, Composite } = Matter;

  const engine = Engine.create();

  const render = Render.create({
    element: document.body,
    engine: engine,
    options: {
      width: 800,
      height: 600,
      wireframes: false
    }
  });

  const runner = Runner.create();
  Runner.run(runner, engine);
  Render.run(render);

  const ground = Bodies.rectangle(400, 610, 810, 60, { isStatic: true });
  const box = Bodies.rectangle(400, 200, 80, 80);

  Composite.add(engine.world, [ground, box]);
</script>

Common patterns

  • Use Composite.add(engine.world, [...]) to add bodies to the world.
  • Use Render.create({ element, engine }) to create a canvas automatically, or pass a canvas you create yourself.
  • Set render.options.wireframes = false for solid rendering.
  • Use Runner.run(runner, engine) for a simple loop, or call Engine.update in your own loop if you need custom timing.

Mouse interaction (optional)

const { Mouse, MouseConstraint } = Matter;
const mouse = Mouse.create(render.canvas);
const mouseConstraint = MouseConstraint.create(engine, { mouse });
Composite.add(engine.world, mouseConstraint);
render.mouse = mouse;

Cleanup checklist (SPA)

  • Stop the runner with Runner.stop(runner).
  • Remove the render canvas from the DOM.
  • Clear engine and world if needed.

Questions to ask when specs are missing

  • What viewport size and scaling should the canvas use?
  • Are we using Matter.Render or a custom renderer?
  • Do you want mouse/touch drag interaction?
  • Should the simulation loop be paused when offscreen?

Frequently asked questions

What does the matterjs skill do?

Use when building physics-driven interactions and layout behaviors with Matter.js.

How do I install matterjs?

Open the “Installation” block on this page and pick your agent — Claude Code, Codex, Cursor or Gemini CLI — for ready-made commands that copy the skill folder to the right place. Or copy the prompt from the “Via assistant” tab and let the assistant review and install the skill.

Which AI models work with matterjs?

Skills are plain Markdown instructions (the Agent Skills format), so matterjs works with any agent that reads SKILL.md: Claude Code, Codex, Cursor, Gemini CLI, GitHub Copilot, OpenCode and more. The model loads the instructions only when a task matches the skill's description.

Is matterjs free?

The skill is published openly by MengTo under the MIT license. The skill itself costs nothing — you only pay your AI provider for the tokens you use.

Is it safe to install skills?

A skill is a set of instructions your agent will follow, so read SKILL.md and its companion files before installing. Scripts in the skill folder only run if your agent runs them — keep an eye on what it does and do not grant unnecessary permissions.

How is a skill different from an MCP server or a plugin?

An MCP server or plugin gives the model new tools — code that runs and returns a result. A skill gives it knowledge and process: how to approach a task, which steps to follow and what good output looks like. It needs no server or API key.

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