headless-mode SKILL.md skillA
headless-mode from live-codes/livecodes is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add live-codes/livecodes/headless-mode@git:20260914.daf8be4Pins git:20260914.daf8be4 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- live-codes/livecodes
- Path
.agents/skills/livecodes/headless-mode/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260914.daf8be4, committed Sep 14, 2026
- First version recorded
- Mar 29, 2026
- Size
- 4,443 bytes
- Repository stars
- 1,526
- License
- MIT
Run playground without visible UI using SDK methods directly. Load this skill when building Markdown compilers, code formatters, or tools that need compiled output without display.
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
This skill builds on sdk-embedding and sdk-methods. Read them first for foundational concepts.
# LiveCodes — Headless Mode
Headless mode runs LiveCodes without any visible UI. Use SDK methods to compile code, get output, and react to events.
## Setup
```javascript
import { createPlayground } from 'livecodes';
// Create headless playground - container is optional
const playground = await createPlayground({
headless: true,
config: {
markup: { language: 'markdown', content: '# Hello World' },
},
});
// Use SDK methods
const code = await playground.getCode();
console.log(code.markup.compiled); // "<h1>Hello World</h1>"
console.log(code.result); // Result page HTML
```
## Core Patterns
### Markdown compiler
```javascript
import { createPlayground } from 'livecodes';
let playground;
async function compileMarkdown(markdown) {
if (!playground) {
playground = await createPlayground({
headless: true,
config: { autoupdate: false },
});
}
await playground.setConfig({
markup: { language: 'markdown', content: markdown },
});
const code = await playground.getCode();
return code.markup.compiled;
}
// Usage
…Read the whole file at its exact version.
How to install
mdr add live-codes/livecodes/headless-mode@sha256:55b94b3bf527c44eThe line at the top of this page pins the label git:20260914.daf8be4, 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_uxzyma2gwehunq6f)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Mar 29, 2026 and Sep 14, 2026, about one every 169 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260914.daf8be4 latest | 2026-09-14 | daf8be4 | 4,443 B | A | view · diff |
| git:20260329.bca496c | 2026-03-29 | bca496c | 4,437 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 (4443 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
live-codes/livecodes · 1,526 stars · license MIT · pushed 2026-10-24 · branch develop
API
GET https://markdownregistry.com/api/v1/artifacts/art_uxzyma2gwehunq6f GET https://markdownregistry.com/api/v1/resolve?ref=live-codes/livecodes/headless-mode GET https://markdownregistry.com/api/v1/blob/55b94b3bf527c44efc6b8191a0c268c52bc483cf92b45950aa6833beec60fb56
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.