debuff

Use when someone wants to start making a 2D web game: a platformer, a top-down adventure, a match-3 puzzle or an empty project. Lists the debuff starter games with the command that creates each one. The user runs it on their own machine.

list_starters

Return the API reference for a debuff class, function, interface or type, such as 'Game', 'Input' or 'GameOptions'. With a partial name, lists the matching symbols.

get_api

Use when someone wants to see or play a small game right away, without installing anything. Turn a single-file debuff game (TypeScript, importing @debuffjp/core, input, juice, audio or dev) into a link that opens it in the debuff playground, where it runs beside the code and is type-checked in the browser. Give the user the link. The code must draw into the page's <canvas id="game">, and must end by choosing a scene and starting the loop, or nothing draws. Shape: const game = new Game({ canvas: document.querySelector<HTMLCanvasElement>("#game")!, width: 320, height: 180 }); game.add({ id: "play", update(dt) { ... }, render(d) { ... } }); game.go("play"); game.start(); Imports: Game from "@debuffjp/core"; Input from "@debuffjp/input" (new Input(game, { bindings: { left: ["ArrowLeft", "KeyA"] } }), then input.down/pressed(action) and input.axis(neg, pos)). Draw only through render's d: d.rect(x, y, w, h, color), d.circle(x, y, r, color), d.line(x1, y1, x2, y2, width, color), d.text(str, x, y, { color }). Never use canvas.getContext. If unsure of an API, check get_api first. Nothing is stored: the code travels in the link itself, so it is long. Show it as a link or button that uses the url field exactly; never retype or shorten it, because one wrong character breaks the game.

playground_link

Return the full markdown of one debuff.jp page, by path from search_docs, e.g. '/docs/params' or '/blog/debuff-vs-pixijs-vs-phaser'.

get_doc

Use when someone wants to make a 2D browser or web game in JavaScript or TypeScript, or asks how to do something in debuff (movement, collision, tilemaps, input, sound, game feel, testing with coding agents). Searches the debuff guides, blog and package docs and returns the best-matching sections with their URL and an excerpt. Use get_doc to read a whole page.

search_docs