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<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Posecode: Inspectable Human Movement as Text</title>
<link rel="icon" type="image/png" sizes="192x192" href="/favicon-192.png" />
<link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png" />
<meta
name="description"
content="Posecode is an open-source, inspectable movement format for animation tools, LLMs, and web products. Write, validate, edit, and render human movement as text."
/>
<meta
name="keywords"
content="movement format, kinematic motion protocol, 3D human movement, animation tools, editable animation, movement DSL, Three.js animation, open source motion language"
/>
<link rel="canonical" href="https://www.posecode.org/" />
<meta name="theme-color" content="#0a0d12" />
<meta property="og:title" content="Posecode: human movement, written as text" />
<meta
property="og:description"
content="A Mermaid-style format for human movement. Write or generate readable motion, validate it, edit it, and render it in the browser."
/>
<meta property="og:type" content="website" />
<meta property="og:url" content="https://www.posecode.org/" />
<meta property="og:site_name" content="Posecode" />
<meta property="og:image" content="https://www.posecode.org/og.png" />
<meta property="og:image:width" content="1200" />
<meta property="og:image:height" content="630" />
<meta name="twitter:card" content="summary_large_image" />
<meta name="twitter:title" content="Posecode: human movement, written as text" />
<meta
name="twitter:description"
content="A Mermaid-style format for human movement. Write or generate readable motion, validate it, edit it, and render it in the browser."
/>
<meta name="twitter:image" content="https://www.posecode.org/og.png" />
<link rel="preconnect" href="https://fonts.googleapis.com" />
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
<!-- Load fonts without blocking render: fetch as a low-priority stylesheet
(media="print") then flip to "all" once loaded. display=swap paints
text in the fallback immediately, so first paint isn't font-gated. -->
<link
rel="preload"
as="style"
href="https://fonts.googleapis.com/css2?family=Hanken+Grotesk:wght@400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;700&display=swap"
/>
<link
href="https://fonts.googleapis.com/css2?family=Hanken+Grotesk:wght@400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;700&display=swap"
rel="stylesheet"
media="print"
onload="this.media='all'"
/>
<noscript>
<link
href="https://fonts.googleapis.com/css2?family=Hanken+Grotesk:wght@400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;700&display=swap"
rel="stylesheet"
/>
</noscript>
<link rel="stylesheet" href="./src/landing.css" />
<script type="application/ld+json">
{
"@context": "https://schema.org",
"@graph": [
{
"@type": "WebSite",
"@id": "https://www.posecode.org/#website",
"url": "https://www.posecode.org/",
"name": "Posecode",
"description": "An open-source, inspectable movement format for animation tools, LLMs, and web products. Describe human movement as text, validate it, and render it in the browser."
},
{
"@type": "SoftwareApplication",
"@id": "https://www.posecode.org/#app",
"name": "Posecode",
"url": "https://www.posecode.org/",
"applicationCategory": "DeveloperApplication",
"operatingSystem": "Any (web browser)",
"description": "Posecode is a small, readable format for single-person movement. Humans or LLMs can author it; the browser validates a closed vocabulary, constrains joint targets to configured ranges, and renders an inspectable animated 3D figure.",
"offers": { "@type": "Offer", "price": "0", "priceCurrency": "USD" },
"license": "https://github.com/posecode-dev/posecode/blob/main/docs/legal/LICENSING.md",
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"keywords": "movement format, kinematic motion, editable animation, 3D animation, animation tools, LLMs, web products, open source"
},
{
"@type": "FAQPage",
"@id": "https://www.posecode.org/#faq",
"mainEntity": [
{
"@type": "Question",
"name": "What is Posecode?",
"acceptedAnswer": {
"@type": "Answer",
"text": "Posecode is an open-source, inspectable movement format. A document describes phases, joint targets, timing, and contacts; tools can validate, edit, diff, and render the same movement."
}
},
{
"@type": "Question",
"name": "Does Posecode require an AI model?",
"acceptedAnswer": {
"@type": "Answer",
"text": "No. Posecode documents can be written by hand, produced by an animation tool, or drafted by an LLM. Parsing, validation, editing, and rendering are deterministic and do not require an AI model."
}
},
{
"@type": "Question",
"name": "Does Posecode guarantee a movement is safe?",
"acceptedAnswer": {
"@type": "Answer",
"text": "No. Posecode constrains authored and IK-generated joint targets to configured reference ranges and reports unresolved reach targets. A simplified rig cannot certify that a whole movement is safe, accurate, or appropriate for a person. It is not medical advice."
}
},
{
"@type": "Question",
"name": "Is Posecode free to use?",
"acceptedAnswer": {
"@type": "Answer",
"text": "Yes. Posecode is open source. The specification and core tooling use Apache-2.0; the product-facing renderer, embed, MCP server, eval harness, and playground use AGPL-3.0. A separate commercial agreement is available for closed-source use of AGPL components."
}
}
]
}
]
}
</script>
</head>
<body>
<div class="bg-fx" aria-hidden="true"></div>
<header class="nav">
<a class="brand" href="/" aria-label="Posecode home">
<svg class="logo" aria-hidden="true" viewBox="0 0 100 100" width="19" height="19" fill="none"><g stroke="currentColor" stroke-width="8" stroke-linecap="round" stroke-linejoin="round"><path d="M50 34V55"/><path d="M50 35L34 26L23 15"/><path d="M50 35L66 26L77 15"/><path d="M50 54L36 72L28 88"/><path d="M50 54L64 72L72 88"/></g><circle cx="50" cy="20" r="10" fill="currentColor"/></svg>
<span class="wordmark">Posecode</span>
</a>
<nav class="nav-links" aria-label="Primary">
<a href="#how">How it works</a>
<a href="#examples">Movements</a>
<a href="#developers">Developers</a>
<a href="/for-products">For products</a>
<a href="https://github.com/posecode-dev/posecode" target="_blank" rel="noopener">GitHub</a>
</nav>
<a class="btn primary nav-cta" href="/play/superhero-landing">Try it live →</a>
</header>
<main>
<section class="hero">
<div class="hero-intro">
<div class="hero-copy reveal">
<p class="eyebrow">A readable format for human movement</p>
<h1 class="headline">Movement you can <span class="hl">inspect.</span></h1>
</div>
<div class="hero-support reveal">
<p class="subhead">
Posecode turns human movement into structured, editable text for animation tools, LLMs, and web
products. Change the source, validate it, and render the same motion in the browser.
</p>
<div class="hero-cta">
<a class="btn primary lg" href="/play/superhero-landing">Open source + motion →</a>
<a class="btn ghost lg" href="./spec.html">Read the format</a>
</div>
<div class="hero-meta" aria-label="Project highlights">
<span>Open source</span>
<span>Deterministic</span>
<span>Human or LLM authored</span>
</div>
</div>
</div>
<div class="hero-stage reveal" aria-label="Posecode source beside its validated live 3D motion">
<div class="studio">
<div class="studio-bar">
<span class="studio-kicker" aria-hidden="true"></span>
<span class="studio-title"><b>Source beside motion.</b> The same document opens in the playground.</span>
<a href="/play/superhero-landing">Open it →</a>
</div>
<div class="studio-workspace">
<div class="source-pane">
<div class="pane-label">
<span>superhero-landing.posecode</span>
<span class="studio-live"><i></i>live</span>
</div>
<pre class="hero-source" aria-label="Posecode source excerpt"><code><span class="source-line"><i>01</i><b class="t-kw">posecode</b> posture <em class="t-str">"Superhero landing"</em></span>
<span class="source-line"><i>02</i> <b class="t-kw">rig</b> humanoid</span>
<span class="source-line"><i>03</i> <b class="t-kw">pose start</b> = standing</span>
<span class="source-line source-gap"><i>04</i></span>
<span class="source-line phase-source-line active active-first"><i>05</i> <b class="t-kw">step</b> <em class="t-str">"Drop into the landing"</em> <strong class="t-num">0.55s</strong> flow:</span>
<span class="source-line phase-source-line active"><i>06</i> pelvis: hinge <strong class="t-num">45</strong></span>
<span class="source-line phase-source-line active"><i>07</i> spine: flex <strong class="t-num">50</strong></span>
<span class="source-line phase-source-line active"><i>08</i> hip_right: flex <strong class="t-num">84</strong></span>
<span class="source-line phase-source-line active"><i>09</i> knee_right: flex <strong class="t-num">123</strong></span>
<span class="source-line phase-source-line active"><i>10</i> <b class="t-kw">ground-lock:</b> foot_right</span>
<span class="source-line phase-source-line active"><i>11</i> <b class="t-kw">reach:</b> knee_left floor</span>
<span class="source-line phase-source-line active active-last"><i>12</i> <b class="t-kw">reach:</b> fist_left floor</span></code></pre>
<div class="source-status" aria-hidden="true">
<i>✓</i> source valid; live constraint checks active
</div>
</div>
<div class="viewer-pane">
<div class="viewer-stage">
<canvas id="hero-canvas"></canvas>
<div class="studio-hud">
<span id="hero-phase">Drop into the landing</span>
<small id="hero-cue">Drop over the planted right foot as the left knee and fist descend</small>
</div>
</div>
<div class="studio-ribbon" aria-hidden="true">
<span class="active">Drop into the landing</span>
<span>Make three-point contact</span>
<span>Hold the landing</span>
<span>Recover to standing</span>
</div>
<div class="studio-transport" aria-hidden="true">
<span class="studio-play">Ⅱ</span>
<span class="studio-scrub"><i></i></span>
<span class="studio-clock">0.4s</span>
<span class="studio-loop"><i></i>loop</span>
<span class="studio-speed">1×</span>
<span class="studio-export">BVH</span>
<span class="studio-export">glTF</span>
</div>
</div>
</div>
</div>
</div>
</section>
<section class="proof" aria-label="Why Posecode">
<article class="proof-item reveal">
<span class="proof-n">01</span>
<div><strong>Deterministic</strong><p>Same document, same validated motion.</p></div>
</article>
<article class="proof-item reveal">
<span class="proof-n">02</span>
<div><strong>Inspectable</strong><p>Joints, timing, contacts, and warnings stay visible.</p></div>
</article>
<article class="proof-item reveal">
<span class="proof-n">03</span>
<div><strong>Built to integrate</strong><p>Parser, renderer, embed, and LLM tools.</p></div>
</article>
</section>
<section id="how" class="how">
<header class="section-head reveal">
<p class="eyebrow">How it works</p>
<h2>From source text to usable motion.</h2>
</header>
<ol class="how-steps">
<li class="reveal">
<span class="how-n">01</span>
<h3>Describe</h3>
<p>Write phases, joint actions, timing, travel, and contacts as readable text.</p>
</li>
<li class="reveal">
<span class="how-n">02</span>
<h3>Validate</h3>
<p>The parser produces typed movement data, clamps configured ranges, and reports diagnostics.</p>
</li>
<li class="reveal">
<span class="how-n">03</span>
<h3>Use</h3>
<p>Render it in Three.js, embed a player, or pass the same document through your own tools.</p>
</li>
</ol>
</section>
<section class="authoring">
<div class="authoring-copy reveal">
<p class="eyebrow">LLM authoring is optional</p>
<h2>Write Posecode directly or start with an LLM draft.</h2>
<p>
A human can author the source, an animation tool can emit it, or an LLM can draft it. The result is
still a small document you can read, edit, diff, validate, and render without model inference.
</p>
</div>
<div class="authoring-paths reveal" aria-label="Posecode authoring paths">
<article>
<span>01 / direct</span>
<h3>Write the movement</h3>
<p>Use the playground, language tooling, or your own editor.</p>
</article>
<article>
<span>02 / assisted</span>
<h3>Draft with an LLM</h3>
<p>Give an LLM the authoring guide, then inspect and revise its output.</p>
<button class="text-action" data-copy-prompt><span class="lbl">Copy LLM authoring guide →</span></button>
</article>
</div>
</section>
<section id="examples" class="examples">
<header class="section-head reveal">
<p class="eyebrow">Movement library</p>
<h2>Start from readable source.</h2>
<p class="section-sub">Open examples across fitness, rehab, dance, and more. Every movement remains editable text.</p>
</header>
<div id="examples-grid" class="examples-grid"></div>
</section>
<section id="developers" class="developers">
<header class="section-head reveal">
<p class="eyebrow">For developers</p>
<h2>Build on the layer you need.</h2>
<p class="section-sub">Adopt the format, compose the runtime packages, or integrate the player into a product.</p>
</header>
<div class="dev-grid">
<a class="dev-card reveal" href="./spec.html">
<span class="dev-kind">Define</span>
<h3>Language spec <span>→</span></h3>
<p>The portable movement contract.</p>
</a>
<a class="dev-card reveal" href="https://github.com/posecode-dev/posecode/tree/main/packages/posecode-parser" target="_blank" rel="noopener">
<span class="dev-kind">Validate</span>
<h3>Parser + typed IR <span>→</span></h3>
<p>Turn text into constrained movement data.</p>
</a>
<a class="dev-card reveal" href="https://github.com/posecode-dev/posecode/tree/main/packages/posecode-render" target="_blank" rel="noopener">
<span class="dev-kind">Render</span>
<h3>Three.js runtime <span>→</span></h3>
<p>Preview procedural or compatible GLB figures.</p>
</a>
<a class="dev-card reveal" href="/for-products#integrate">
<span class="dev-kind">Integrate</span>
<h3>Embed + LLM tools <span>→</span></h3>
<p>Add inspectable movement to a web product or workflow.</p>
</a>
</div>
</section>
<section class="final-cta reveal">
<p class="eyebrow">Make movement inspectable</p>
<h2>Keep the movement as readable source.</h2>
<p>Open the source beside the movement, change one instruction, and see exactly what changed.</p>
<div class="hero-cta">
<a class="btn primary lg" href="/play/superhero-landing">Start with the playground →</a>
<a class="btn ghost lg" href="/for-products">Explore integrations →</a>
</div>
</section>
</main>
<footer class="footer">
<div class="footer-top">
<div class="footer-brand">
<svg class="logo" aria-hidden="true" viewBox="0 0 100 100" width="19" height="19" fill="none"><g stroke="currentColor" stroke-width="8" stroke-linecap="round" stroke-linejoin="round"><path d="M50 34V55"/><path d="M50 35L34 26L23 15"/><path d="M50 35L66 26L77 15"/><path d="M50 54L36 72L28 88"/><path d="M50 54L64 72L72 88"/></g><circle cx="50" cy="20" r="10" fill="currentColor"/></svg>
<span>Posecode</span>
<small>human movement, written as text</small>
</div>
<nav class="footer-links" aria-label="Footer">
<a href="./moves/">Movements</a>
<a href="./spec.html">Spec</a>
<a href="./llm-guide.html">LLM authoring</a>
<a href="/for-products">For products</a>
<a href="mailto:hello@posecode.org?subject=Posecode%20Feedback">Feedback</a>
<a href="https://github.com/posecode-dev/posecode" target="_blank" rel="noopener">Source</a>
<a href="https://github.com/posecode-dev/posecode/blob/main/docs/legal/LICENSING.md" target="_blank" rel="noopener">Licensing</a>
</nav>
</div>
<p class="footer-note">
Open source under Apache-2.0 and AGPL-3.0 · Range-of-motion values are general literature data, not medical advice.
</p>
</footer>
<script type="module" src="./src/landing.ts"></script>
</body>
</html>