live-codes/livecodes is a browser-based code playground for writing and running code in more than 90 languages, frameworks, and processors. It is used to experiment with code, import modules, embed interactive editors in websites, and host playgrounds on a static file server without a backend. The catalogue add-ons support working with LiveCodes.
Borrowing it
Nothing to install: this file belongs to live-codes/livecodes. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/live-codes/livecodes/develop/.agents/skills/livecodes/language-support/SKILL.mdgit clone --depth 1 https://github.com/live-codes/livecodesWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/live-codes/livecodes/language-support)<a href="https://agentmods.dev/skills/live-codes/livecodes/language-support"><img src="https://agentmods.dev/badge/skills/live-codes/livecodes/language-support/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/live-codes/livecodes/language-support"><img src="https://agentmods.dev/badge/skills/live-codes/livecodes/language-support.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00059 | $0.01606 |
| Opus 5.5 | $0.00024 | $0.00642 |
| Sonnet 5.5 | $0.00012 | $0.00321 |
| Haiku 4.5 | $0.00006 | $0.00161 |
Grade A, and why
language-support scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 211 lines — stays where its author put it; the contents beside it link to each section on GitHub.
LiveCodes — Work with Languages
LiveCodes supports 90+ languages across three editors: markup (HTML/templating), style (CSS/preprocessors), and script (JS/compiled languages).
Setup
import { createPlayground } from 'livecodes';
// Basic language setup
createPlayground('#container', {
config: {
markup: { language: 'markdown', content: '# Hello' },
style: { language: 'scss', content: '$color: blue; body { color: $color; }' },
script: { language: 'typescript', content: 'const x: number = 1;' },
},
});
// WASM language (Python)
createPlayground('#container', {
config: {
script: { language: 'python-wasm', content: 'print("Hello from Python")' },
},
});
// Framework template
createPlayground('#container', { template: 'react' });
Core Patterns
Set language for each editor
// Markup languages
markup: { language: 'html', content: '...' } // HTML
markup: { language: 'markdown', content: '...' } // Markdown
markup: { language: 'mdx', content: '...' } // MDX
markup: { language: 'pug', content: '...' } // Pug
markup: { language: 'handlebars', content: '...' } // Handlebars
// Style languages
style: { language: 'css', content: '...' } // CSS
style: { language: 'scss', content: '...' } // SCSS/Sass
style: { language: 'less', content: '...' } // Less
style: { language: 'stylus', content: '...' } // Stylus
// Script languages
script: { language: 'javascript', content: '...' } // JavaScript
script: { language: 'typescript', content: '...' } // TypeScript
script: { language: 'jsx', content: '...' } // JSX
script: { language: 'tsx', content: '...' } // TSX
Use CSS processors
const config = {
style: { language: 'css', content: '...' },
processors: [
'tailwindcss', // Tailwind CSS
'autoprefixer', // Add vendor prefixes
'postcssPresetEnv', // Use future CSS
'cssmodules', // CSS Modules
'cssnano', // Minify
],
};
// Processors run in order listed
// Tailwind should come before PostCSS tools
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago Changed · +1 lines · -3 tokens per session 49cad86f0b8a
- 2mo ago First seen · 210 lines · 62 tokens per session scan A ae2ae4a06941
language-support is a skill published in the GitHub repository live-codes/livecodes (1,525 stars, last pushed 13d ago), licensed MIT. It adds 59 tokens to every session and 1,606 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
language-support compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| language-supportlive-codes/livecodes | Skill | 1.5k | 13d ago | MIT | A | 59 | Claude Code, Codex |
| psl-ast-layersprisma/orm | Skill | 48k | yesterday | Apache-2.0 | A | 78 | Claude Code, Codex |
| ast-visitor-patternprisma/orm | Skill | 48k | yesterday | Apache-2.0 | A | 65 | Claude Code, Codex |
| no-bare-castsprisma/orm | Skill | 48k | yesterday | Apache-2.0 | A | 52 | Claude Code, Codex |
| bumping-biomeprisma/orm | Skill | 48k | yesterday | Apache-2.0 | A | 96 | Claude Code, Codex |
| migrate-oxfmtoxc-project/oxc | Skill | 23k | today | MIT | A | 48 | Claude Code, Codex |
| ax-cpp-aiax-llm/ax | Skill | 3.0k | 3d ago | Apache-2.0 | A | 47 | Claude Code, Codex |