LittleJS-AI

LittleJS-AI is a free, MIT-licensed toolkit from Frank Force, the developer of the open-source LittleJS HTML5 game engine, for making browser games with AI coding agents. The repo bundles the engine, starter templates, helper modules for menus, sound effects and sprites, an API reference and agent instructions (CLAUDE.md and AGENTS.md).

It also works as a Claude Code plugin. You add the repo as a plugin marketplace, install littlejs, then ask for a game in an empty folder; the README says Claude scaffolds a complete project with the engine included that opens from a file, with no server or npm install. The plugin has five skills, which we confirmed in the repo on November 4, 2026: engine conventions, a new-game scaffolder, an API lookup, shape sprite art from the built-in atlas, and a custom level editor. The README says the toolkit also works with GitHub Copilot, Codex and Cursor.

The README argues that because LittleJS already provides the core systems (drawing, controls, physics and sound), a coding agent can put its work into the game itself instead of rewriting engine code. The README says more than 50 games made with these tools are playable in the LittleJS Arcade, and Force also offers a LittleJS custom GPT on ChatGPT for people who don't want to write code. AIGamer hasn't tested it. The repo had about 80 GitHub stars as of November 4, 2026; the main LittleJS engine repo had about 4,400.