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Melonjs Math

Melonjs Math is an agent skill (a SKILL.md file) from melonjs/melonJS. It is used for vector and matrix maths in melonJS — Vector2d, Vector3d, their observable variants, Matrix2d, Matrix3d, and the math utility functions. It works with Claude Code and has 6,419 GitHub stars across a repository of 4 listed skills.

github.com/melonjs/melonJS/packages/melonjs/skills/melonjs-math (opens in a new tab)

Data as of from the GitHub API; description from the skill's SKILL.md. Report an error

View on GitHub (opens in a new tab)

Add this skill

Claude

This repository is a Claude Code plugin marketplace. In Claude Code:

/plugin marketplace add melonjs/melonJS
/plugin install melonjs@melonjs

In the Claude apps, zip the melonjs-math folder and upload it under Customize > Skills > + > Upload a skill (code execution must be on).

ChatGPT / Codex

Codex reads skills from .agents/skills/ in a repo or ~/.agents/skills/ for every project:

git clone --depth 1 https://github.com/melonjs/melonJS.git
cp -r melonJS/packages/melonjs/skills/melonjs-math .agents/skills/melonjs-math   # repo; ~/.agents/skills for all projects

Standalone skills also load in the ChatGPT desktop app.

Cursor

Cursor loads skills from .cursor/skills/ (or ~/.cursor/skills/) and also reads .claude/skills/:

git clone --depth 1 https://github.com/melonjs/melonJS.git
cp -r melonJS/packages/melonjs/skills/melonjs-math .cursor/skills/melonjs-math   # project; ~/.cursor/skills for all projects

Source (checked Oct 7, 2026): code.claude.com/docs/en/skills (opens in a new tab), code.claude.com/docs/en/plugin-marketplaces (opens in a new tab), support.claude.com/en/articles/12512180-using-skills-in-claude (opens in a new tab), learn.chatgpt.com/docs/build-skills (opens in a new tab), cursor.com/docs/context/skills (opens in a new tab)

What this skill does

Use this skill for vector and matrix maths in melonJS — Vector2d, Vector3d, their observable variants, Matrix2d, Matrix3d, and the math utility functions. Covers which methods mutate and which allocate, the vector pool and when clone() is the wrong tool, interpolation with lerp, slerp, damp and moveTowards, and the argument defaults that silently drop a component.

When it triggers

  • Use this skill for vector and matrix maths in melonJS — Vector2d, Vector3d, their observable variants, Matrix2d, Matrix3d, and the math utility functions.
  • Triggers on: Vector2d, Vector3d, ObservableVector2d, ObservableVector3d, Matrix2d, Matrix3d, vector, vector maths, dot, cross, normalize, length, distance, angle, lerp, slerp, damp, moveTowards, project, clamp, degToRad, radToDeg, clone, ve

More skills in melonjs/melonJS

4 skills are listed from this repository.

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FAQ

Melonjs Math FAQ

Still curious? Email info@appsgit.com.

How do I install the Melonjs Math skill?

In Claude Code, run /plugin marketplace add melonjs/melonJS and then /plugin install melonjs@melonjs. For Codex or Cursor, copy the melonjs-math folder into .agents/skills/ or .cursor/skills/.

Is the Melonjs Math skill free?

Yes. The repository is open source under the MIT license.

Is Melonjs Math maintained?

The repository's most recent commit was on Oct 26, 2026. Its latest release is 20.10.1. appsgit only lists skills from repositories with a commit in the last six months.