livecodes/sdk-embedding

A software kit for embedding LiveCodes, a browser-based interactive code playground, inside a web page. It creates editors and previews from templates or supplied HTML, CSS, and JavaScript.

In plain words
What is it for?
Use it to add React, Vue, or custom-code playgrounds, choose when they load, configure their container, or connect them to a self-hosted LiveCodes instance.
Why use it?
It lets a web page include runnable code examples without building the playground interface from scratch.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/live-codes/livecodes/sdk-embedding
Any agent
npx skills add live-codes/livecodes --skill sdk-embedding
Clone the repo
git clone --depth 1 https://github.com/live-codes/livecodes

Made for: Claude Code, Codex.

Per session 63 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,400 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00063 $0.01400
Opus 5 $0.00032 $0.00700
Sonnet 5 $0.00013 $0.00280
Haiku 4.5 $0.00006 $0.00140

Measured 2d ago against content hash 7bcbfbd76ce7, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

livecodes/sdk-embedding 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 2d 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.

.agents/skills/livecodes/sdk-embedding/SKILL.md · 242 lines

How it starts

The opening of the file, as written. The whole thing — 242 lines — stays where its author put it; the contents beside it link to each section on GitHub.

LiveCodes — Create Embedded Playground

LiveCodes is a client-side code playground that runs in the browser. Use createPlayground to embed interactive code editors in any web page.

Setup

import { createPlayground } from 'livecodes';

// Minimal embed with template
createPlayground('#container', {
  template: 'react',
});

// Embed with custom code
createPlayground('#container', {
  config: {
    markup: { language: 'html', content: '<h1>Hello World</h1>' },
    style: { language: 'css', content: 'h1 { color: blue; }' },
    script: { language: 'javascript', content: 'console.log("Hello");' },
  },
});

// CDN usage (no bundler)
import { createPlayground } from 'https://cdn.jsdelivr.net/npm/livecodes';
createPlayground('#container', { template: 'vue' });

Core Patterns

Load playground lazily

Playgrounds load when they approach the viewport by default. Use loading: 'eager' for immediate load or loading: 'click' for click-to-load.

createPlayground('#container', {
  template: 'react',
  loading: 'click', // Shows "Click to load" screen
});

Configure via query params

For simple cases, use URL-style params instead of full config objects.

createPlayground('#container', {
  params: {
    html: '<h1>Hello</h1>',
    css: 'h1 { color: blue; }',
    js: 'console.log("Hello")',
    console: 'open',
  },
});

Use self-hosted instance

Point to your own LiveCodes deployment.

createPlayground('#container', {
  appUrl: 'https://playground.mywebsite.com',
  template: 'react',
});

Multiple sources priority

When providing multiple config sources, they override in order: template < import < config < params.

createPlayground('#container', {
  template: 'react', // Lowest priority
  import: 'https://gist.github.com/...', // Overrides template
  config: {
    /* ... */
  }, // Overrides import
  params: { js: '...' }, // Highest priority
});

Generate shareable URL

Read the full file on GitHub · 242 lines

Changes

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.

  1. 2d ago First seen · 242 lines · 63 tokens per session scan A 7bcbfbd76ce7

Subscribe to this mod's changes

livecodes/sdk-embedding is a skill published in the GitHub repository live-codes/livecodes (1,490 stars, last pushed 5d ago), licensed MIT. It adds 63 tokens to every session and 1,400 once invoked, about $0.0003 per session on Opus 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.

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