melonjs-renderer-backends SKILL.md skillA
melonjs-renderer-backends from melonjs/melonjs is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add melonjs/melonjs/melonjs-renderer-backends@git:20261030.3d5fa8aPins git:20261030.3d5fa8a in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- melonjs/melonjs
- Path
packages/melonjs/skills/melonjs-renderer-backends/SKILL.md- Versions recorded
- 3
- Latest version
- git:20261030.3d5fa8a, committed Oct 30, 2026
- First version recorded
- Aug 31, 2026
- Size
- 9,678 bytes
- Repository stars
- 6,441
- License
- MIT
Use this skill when a feature works on one machine and not another, when choosing or pinning a renderer, or when writing code that must degrade gracefully. Covers the WebGPU to WebGL 2 to Canvas fallback ladder, what each backend supports, capability detection, and the subsystems that warn once and then stop working on Canvas. Triggers on: video.AUTO, video.WEBGPU, video.WEBGL, video.CANVAS, renderer.type, supportsDepthBuffer, shaderLanguage, WebGPU, WebGL2, Canvas fallback, context loss…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Renderer backends and graceful degradation
> `video.AUTO` picks a backend at **runtime**. The same code runs on a different
> renderer depending on the machine, and several subsystems degrade to nothing
> rather than erroring. This is the root cause of most "works on my machine"
> reports.
## The ladder
`video.AUTO` (the default) tries **WebGPU → WebGL 2 → Canvas** and uses the first
that initialises.
```js
const app = new Application(800, 600, {
parent: "screen",
renderer: video.AUTO, // or video.WEBGPU / video.WEBGL / video.CANVAS
});
await app.init();
```
WebGL 1 is not in the ladder — 20.x made WebGL 2 the baseline, and pinning
`video.WEBGL` **rejects** on a WebGL-1-only device rather than degrading.
## What each backend can do
| | WebGPU | WebGL 2 | Canvas |
|---|---|---|---|
| sprites, tilemaps, text | ✅ | ✅ | ✅ |
| blend modes | ✅ | ✅ | ✅ except `"none"` |
| shaders and post effects | ✅ | ✅ | ❌ inert |
| `Light2d` glow (`drawLight`) | ✅ | ✅ | ✅ cached radial gradient |
| normal-map lighting, `Light3d` | ✅ | ✅ | ❌ inert |
| `Mesh` | ✅ | ✅ | ⚠️ CPU-projected, no depth |
| `Camera3d` / depth sorting | ✅ | ✅ | ❌ warns, renders wrong |
…Read the whole file at its exact version.
How to install
mdr add melonjs/melonjs/melonjs-renderer-backends@sha256:67272811234aa2a7The line at the top of this page pins the label git:20261030.3d5fa8a, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_aol4tfmoligspuek)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Aug 31, 2026 and Oct 30, 2026, about one every 30 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261030.3d5fa8a latest | 2026-10-30 | 3d5fa8a | 9,678 B | A | view · diff |
| git:20260912.e58c42f | 2026-09-12 | e58c42f | 9,620 B | A | view · diff |
| git:20260831.8e2f9be | 2026-08-31 | 8e2f9be | 8,228 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (9678 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
melonjs/melonjs · 6,441 stars · license MIT · pushed 2026-11-06 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_aol4tfmoligspuek GET https://markdownregistry.com/api/v1/resolve?ref=melonjs/melonjs/melonjs-renderer-backends GET https://markdownregistry.com/api/v1/blob/67272811234aa2a7371ade19e3cc81604474ab6a634aeea1f6dfdde9ae150757
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.