example-canvas SKILL.md skillB
example-canvas from bintzgavin/helios is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add bintzgavin/helios/example-canvas@git:20261009.c6b0c13Pins git:20261009.c6b0c13 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- B, 16 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- bintzgavin/helios
- Path
skills/examples/canvas/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261009.c6b0c13, committed Oct 9, 2026
- Size
- 1,701 bytes
- Repository stars
- 122
- License
- Apache-2.0
Patterns for using Helios with Vanilla Canvas API. Use when building high-performance 2D/3D animations without frameworks.
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
# Vanilla Canvas Patterns
Use Helios directly with the HTML5 Canvas API. This provides the lowest overhead and highest performance.
## Quick Start
### 1. HTML Setup
```html
<!-- composition.html -->
<canvas id="canvas"></canvas>
<script type="module" src="./main.js"></script>
```
### 2. Logic Setup
```javascript
// main.js
import { Helios } from '@helios-project/core';
// Setup
const canvas = document.getElementById('canvas');
const ctx = canvas.getContext('2d');
const width = 1920;
const height = 1080;
canvas.width = width;
canvas.height = height;
// Initialize Helios
const helios = new Helios({
duration: 5,
fps: 60
});
helios.bindToDocumentTimeline();
window.helios = helios;
// Draw Function
function draw(frame) {
// Clear
ctx.clearRect(0, 0, width, height);
// Calculate state
const time = frame / helios.fps;
const t = time / helios.duration; // 0..1
// Draw
const x = t * (width - 100);
ctx.fillStyle = 'tomato';
ctx.fillRect(x, height / 2 - 50, 100, 100);
}
// Subscribe
helios.subscribe((state) => {
draw(state.currentFrame);
});
// Initial Render
draw(0);
```
## Performance Tips
…Read the whole file at its exact version.
How to install
mdr add bintzgavin/helios/example-canvas@sha256:809f8557ecc73ef3The line at the top of this page pins the label git:20261009.c6b0c13, 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_q2xxhey2nlg4hhsp)
0 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Oct 9, 2026.
Audit of the latest version
- fail: No script tag (matched: <script)
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (1701 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
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
bintzgavin/helios · 122 stars · license Apache-2.0 · pushed 2026-10-23 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_q2xxhey2nlg4hhsp GET https://markdownregistry.com/api/v1/resolve?ref=bintzgavin/helios/example-canvas GET https://markdownregistry.com/api/v1/blob/809f8557ecc73ef396e204b57c12a458e5ceff3eebb1d9c9cba317d5219b695a
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.