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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>TAF Agent — Transformer Diagnostic in your Browser</title>
  <meta name="description" content="Predict transformer LLM behaviour from config alone. Free, unlimited, runs entirely in your browser." />
  <link rel="stylesheet" href="style.css" />
  <script src="https://cdn.jsdelivr.net/pyodide/v0.26.4/full/pyodide.js"></script>
</head>
<body>
  <header>
    <h1>🔬 TAF Agent</h1>
    <p class="tagline">
      Transformer diagnostic in your browser. <strong>Free. Unlimited. Auditable.</strong>
    </p>
    <p class="subtle">
      All computation happens locally — your data never leaves this page.
    </p>
    <p style="margin-top: 0.75rem;">
      <button id="help-btn" type="button">📘 Help & examples</button>
    </p>
  </header>

  <!-- Help modal -->
  <div id="help-modal">
    <div class="help-content">
      <button class="help-close" id="help-close">×</button>
      <h2>📘 TAF Agent — User Manual</h2>

      <h3>What does it do?</h3>
      <p>Predicts <strong>practical viability</strong> of any transformer LLM <em>before you spend GPU/$</em>.
      Answers questions like "will this model work at L=32K?" or "should I train custom or use API?" using
      deterministic Python formulas (TAF — Thermodynamic Attention Framework).</p>

      <h3>How to use — 2 modes</h3>
      <p><strong>💬 Ask in plain English</strong> (default): type your question, the in-browser LLM picks
      the right recipe and runs it. Best for casual exploration.</p>
      <p><strong>📋 Pick recipe + form</strong>: select a recipe manually, fill the parameters, run.
      Best when you want full control or know exactly what you need.</p>

      <h3>The 5 recipes available</h3>

      <p><strong>X-1 Custom training vs API</strong> — compares cost of training your own model vs paying for API access.</p>
      <div class="help-example">
        Try: <em>"Should I train an 8B custom model or use GPT-4o for 50M tokens/month?"</em><br>
        Answer types: YES (custom) / NO (API) with break-even months.
      </div>

      <p><strong>X-2 Long Context Viability</strong> — predicts if a model serves a target context length reliably.</p>
      <div class="help-example">
        Try: <em>"Will Meta-Llama-3-8B handle 32000 tokens for retrieval?"</em><br>
        Chains: γ_Padé → decomposition → d_horizon → NIAH ceiling → hallucination → KV memory.<br>
        Verdict: YES / DEGRADED / NO with mitigation if needed.
      </div>

      <p><strong>X-3 Budget pre-flight</strong> — given $ budget, what model is feasible to train?</p>
      <div class="help-example">
        Try: <em>"I have $5000, what model can I train?"</em><br>
        Answer: GO / TINY-MODEL / MEMORY-LIMITED with concrete N (params) and D (tokens).
      </div>

      <p><strong>X-5 Hardware selection</strong> — which GPU should I use to serve at target throughput?</p>
      <div class="help-example">
        Try: <em>"Cheapest hardware to serve Llama-3-8B at 10M tokens/day"</em><br>
        Answer: best GPU + $/Mtok + capacity vs target.
      </div>

      <p><strong>X-19 KV Compression decision</strong> — should I use soft decay, hard cutoff, or literature methods?</p>
      <div class="help-example">
        Try: <em>"How to compress KV cache for Qwen2.5-7B at 32K?"</em><br>
        Answer: USE SOFT DECAY / USE D_f CUTOFF / USE LITERATURE METHODS / USE HARD T_train.
      </div>

      <h3>Adding new models</h3>
      <ul>
        <li><strong>Preset list</strong>: 11 popular models curated. Just select from dropdown.</li>
        <li><strong>HF Hub fetch</strong>: paste any model id (e.g. <code>Qwen/Qwen2.5-32B-Instruct</code>),
          click 📥 Fetch. Browser downloads <code>config.json</code> directly from HuggingFace,
          fills the form. Works for any public model.</li>
        <li><strong>Manual</strong>: fill the form fields directly with values from the model card.</li>
      </ul>

      <h3>The audit chain</h3>
      <p>Every result shows the full <strong>Computation Chain</strong> — each formula step with its inputs,
      output, and interpretation. Click any step to expand. Cite section numbers (§26.1, §19.1, etc.) refer
      to the underlying paper for derivation.</p>

      <h3>The plain-English answer</h3>
      <p>After the deterministic chain runs, an in-browser LLM (Qwen2.5-0.5B, ~350MB cached after first load)
      synthesizes a plain-English summary. The numbers above are <em>always correct</em> (deterministic Python);
      the synthesis is LLM-generated — verify against the chain if in doubt.</p>

      <h3>Common parameters explained</h3>
      <ul>
        <li><strong>θ (rope_theta)</strong>: RoPE base frequency. Higher = more long-range capacity.
          Typical: 10000 (early), 500000 (Llama-3), 1000000 (Qwen2.5).</li>
        <li><strong>T_train</strong>: max context the model was trained on. From <code>max_position_embeddings</code>.</li>
        <li><strong>T_eval</strong>: <em>your target</em> inference context length. The key knob.</li>
        <li><strong>n_kv_heads &lt; n_attention_heads</strong>: model uses GQA (Grouped Query Attention).
          Reduces KV memory but pushes γ toward Hagedorn.</li>
        <li><strong>has_SWA</strong>: model uses Sliding Window Attention (Mistral, gemma-2).</li>
        <li><strong>n_params</strong>: total parameter count. Threshold ~400M for induction-head emergence.</li>
      </ul>

      <h3>What to look for in verdicts</h3>
      <ul>
        <li><strong style="color:#3fb950;">YES / GO</strong> — proceed with confidence; numbers support the choice.</li>
        <li><strong style="color:#d29922;">DEGRADED / TINY-MODEL</strong> — works but with caveats; read the action.</li>
        <li><strong style="color:#f85149;">NO / MEMORY-LIMITED</strong> — don't proceed as-is; mitigation provided.</li>
      </ul>

      <h3>Privacy</h3>
      <p>Everything runs in your browser. No telemetry, no analytics, no data sent anywhere. Even the LLM model
      runs locally via WebGPU/WebAssembly. Your model_ids and questions never leave this page.</p>

      <h3>Source & paper</h3>
      <p>Source code: <a href="https://github.com/karlesmarin/tafagent" target="_blank">github.com/karlesmarin/tafagent</a><br>
      Paper: <em>Marin 2026 — Transformer Thermodynamics</em> (arXiv forthcoming)</p>
    </div>
  </div>

  <main>
    <!-- Status -->
    <section id="status-bar"><div id="status">⏳ Loading Python runtime...</div></section>

    <!-- Mode toggle -->
    <section id="mode-section">
      <h2>🎯 Mode <span class="info"><span class="tooltip"><strong>Two ways to use the tool</strong>.<br>
        <strong>Ask</strong>: free-form question, browser LLM picks the right recipe.<br>
        <strong>Recipe</strong>: manual selection with full form control.<br>
        Same result either way — pick whichever fits your style.
        </span></span></h2>
      <div class="mode-tabs">
        <button class="mode-btn active" data-mode="ask">💬 Ask in plain English</button>
        <button class="mode-btn" data-mode="recipe">📋 Pick recipe + fill form</button>
      </div>
      <p id="mode-desc" class="recipe-desc">
        Type a free-form question (e.g. "Will Llama-3-8B work at 32K context?"). The
        in-browser LLM picks the right recipe and runs it.
      </p>
    </section>

    <!-- Free-form question (mode=ask) -->
    <section id="ask-section">
      <h2>❓ Your question</h2>
      <textarea id="question" rows="3" placeholder="e.g. Will Mistral-7B handle 16K NIAH retrieval? Or: I have $5,000, what model can I train? Or: Cheapest GPU to serve Llama-70B at 100M tokens/day?"></textarea>
      <div style="display:flex; gap:0.5rem; margin-top:0.5rem; flex-wrap:wrap;">
        <button id="ask-btn" disabled>🚀 Analyze</button>
        <button id="example-btn" type="button" class="secondary">💡 Try an example</button>
      </div>
    </section>

    <!-- Recipe selector (mode=recipe) -->
    <section id="recipe-section" style="display:none;">
      <h2>📋 Recipe</h2>
      <select id="recipe-select" disabled>
        <option value="">— select a recipe —</option>
      </select>
      <p id="recipe-desc-display" class="recipe-desc"></p>
    </section>

    <!-- Form (mode=recipe) -->
    <section id="form-section" style="display:none;">
      <h2>🎯 Inputs</h2>

      <div class="form-row">
        <label for="preset">Preset model:</label>
        <select id="preset" disabled>
          <option value="">— select to autofill —</option>
        </select>
      </div>

      <div class="form-row">
        <label for="hf-id">Or any HF model:</label>
        <input type="text" id="hf-id" placeholder="e.g. Qwen/Qwen2.5-32B-Instruct" style="flex:1;" />
        <button id="hf-fetch-btn" type="button" class="secondary">📥 Fetch</button>
      </div>
      <div id="hf-status" class="subtle" style="margin: -0.5rem 0 1rem; min-height:1.2em;"></div>

      <!-- Dynamic form fields based on recipe -->
      <div id="dynamic-form" class="form-grid"></div>

      <button id="run-btn" disabled>🚀 Analyze</button>
    </section>

    <!-- Output -->
    <section id="output-section" style="display:none;">
      <h2>📊 Verdict</h2>
      <div id="verdict-box"></div>

      <h2>🔍 Computation Chain</h2>
      <p class="subtle">Every number below is deterministic Python. Click a step to expand.</p>
      <div id="chain-box"></div>

      <h2 id="answer-header" style="display:none;">💬 Plain-English Answer</h2>
      <div id="answer-box" style="display:none;"></div>
    </section>
  </main>

  <footer>
    <p>
      © 2026 Carles Marin · Apache-2.0 ·
      <a href="https://github.com/karlesmarin/tafagent" target="_blank">Source on GitHub</a>
    </p>
    <p class="subtle">
      Computation: Pyodide (Python in browser) · Synthesis: WebLLM (Llama-3.2-1B local) · Hosting: GitHub Pages
    </p>
  </footer>

  <script type="module" src="js/main.js"></script>
</body>
</html>