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<title>Claude Prompt Engineering — Complete Course</title>
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      <h1 class="hero__title animate-in" id="hero-title">
        Master <em>Prompt Engineering</em><br>for Claude AI
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        11 in-depth lessons — from basic structure to advanced multi-prompt architectures.
        Unlock Claude's full potential with techniques used by top AI engineers.
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          <text x="34" y="87" fill="var(--color-text)" font-size="10" font-family="monospace">You are an expert ML engineer. Explain backpropagation</text>
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          <text x="34" y="158" fill="var(--color-text)" font-size="10" font-family="monospace">&lt;math&gt;∂L/∂w = ∂L/∂a · ∂a/∂z · ∂z/∂w&lt;/math&gt;</text>
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  <!-- WHAT YOU'LL LEARN -->
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      <div class="section__header">
        <span class="section__label">What you'll learn</span>
        <h2 class="section__title">Everything from zero to advanced</h2>
        <p class="section__desc">Build real-world prompting skills with hands-on examples, before/after comparisons, and industry use cases.</p>
      </div>
      <div class="feature-grid">
        <div class="feature-item">
          <div class="feature-icon">🏗️</div>
          <div class="feature-text">
            <div class="feature-text__title">Prompt Structure Fundamentals</div>
            <div class="feature-text__desc">Understand how Claude processes instructions and build prompts that always get the response you need.</div>
          </div>
        </div>
        <div class="feature-item">
          <div class="feature-icon">🎭</div>
          <div class="feature-text">
            <div class="feature-text__title">Role & Persona Prompting</div>
            <div class="feature-text__desc">Assign expert identities to Claude to unlock domain-specific knowledge and communication styles.</div>
          </div>
        </div>
        <div class="feature-item">
          <div class="feature-icon">🧠</div>
          <div class="feature-text">
            <div class="feature-text__title">Chain-of-Thought Reasoning</div>
            <div class="feature-text__desc">Make Claude think step-by-step to solve complex problems, math, and multi-step logic accurately.</div>
          </div>
        </div>
        <div class="feature-item">
          <div class="feature-icon">📐</div>
          <div class="feature-text">
            <div class="feature-text__title">XML Structuring & Formatting</div>
            <div class="feature-text__desc">Use XML tags to separate data from instructions and control output format with precision.</div>
          </div>
        </div>
        <div class="feature-item">
          <div class="feature-icon">🛡️</div>
          <div class="feature-text">
            <div class="feature-text__title">Hallucination Prevention</div>
            <div class="feature-text__desc">Techniques to ensure Claude stays grounded in facts and admits uncertainty appropriately.</div>
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        <div class="feature-item">
          <div class="feature-icon">⛓️</div>
          <div class="feature-text">
            <div class="feature-text__title">Prompt Chaining & Tool Use</div>
            <div class="feature-text__desc">Build multi-step AI workflows by chaining prompts and integrating external tools and APIs.</div>
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        <span class="section__label">Curriculum</span>
        <h2 class="section__title">11 lessons across 3 levels</h2>
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            Beginner
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          <div class="track-card__title">Core Foundations</div>
          <div class="track-card__desc">Learn how Claude reads prompts, why clarity matters, and how to assign expert roles that shape every response.</div>
          <ul class="track-card__lessons" role="list">
            <li class="track-card__lesson"><span class="lesson-dot"></span><a href="lessons/ch01-basic-structure.html">Ch 1 · Basic Prompt Structure</a></li>
            <li class="track-card__lesson"><span class="lesson-dot"></span><a href="lessons/ch02-clear-direct.html">Ch 2 · Being Clear and Direct</a></li>
            <li class="track-card__lesson"><span class="lesson-dot"></span><a href="lessons/ch03-assigning-roles.html">Ch 3 · Assigning Roles</a></li>
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            Intermediate
          </div>
          <div class="track-card__title">Structuring & Reasoning</div>
          <div class="track-card__desc">Separate data from instructions with XML, format outputs precisely, make Claude think step-by-step, and use few-shot examples.</div>
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            <li class="track-card__lesson"><span class="lesson-dot"></span><a href="lessons/ch04-separating-data.html">Ch 4 · Separating Data from Instructions</a></li>
            <li class="track-card__lesson"><span class="lesson-dot"></span><a href="lessons/ch05-formatting-output.html">Ch 5 · Formatting Output & Speaking for Claude</a></li>
            <li class="track-card__lesson"><span class="lesson-dot"></span><a href="lessons/ch06-precognition.html">Ch 6 · Precognition (Thinking Step by Step)</a></li>
            <li class="track-card__lesson"><span class="lesson-dot"></span><a href="lessons/ch07-using-examples.html">Ch 7 · Using Examples (Few-Shot)</a></li>
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          <div class="track-card__title">Production Prompting</div>
          <div class="track-card__desc">Eliminate hallucinations, build complex industry-grade prompts, and go beyond single-turn interactions.</div>
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            <li class="track-card__lesson"><span class="lesson-dot"></span><a href="lessons/ch08-avoiding-hallucinations.html">Ch 8 · Avoiding Hallucinations</a></li>
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          <div class="track-card__title">Beyond Standard Prompting</div>
          <div class="track-card__desc">Advanced architectures for real-world AI systems: chaining prompts and integrating external tools.</div>
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        <a href="lessons/ch01-basic-structure.html" class="lesson-card">
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            <span class="lesson-card__num">CH·01</span>
            <span class="lesson-card__badge badge--beginner">Beginner</span>
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          <div class="lesson-card__title">Basic Prompt Structure</div>
          <div class="lesson-card__desc">Understand how Claude parses your messages. Learn the anatomy of a great prompt: role, context, task, and format.</div>
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            <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="12" r="10"/><polyline points="12 6 12 12 16 14"/></svg> 12 min
            <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"/></svg> 8 examples
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            <span class="lesson-card__num">CH·02</span>
            <span class="lesson-card__badge badge--beginner">Beginner</span>
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          <div class="lesson-card__title">Being Clear and Direct</div>
          <div class="lesson-card__desc">Why vague prompts fail. Techniques for writing precise, unambiguous instructions that eliminate guesswork.</div>
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            <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="12" r="10"/><polyline points="12 6 12 12 16 14"/></svg> 10 min
            <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"/></svg> 6 examples
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            <span class="lesson-card__num">CH·03</span>
            <span class="lesson-card__badge badge--beginner">Beginner</span>
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          <div class="lesson-card__title">Assigning Roles</div>
          <div class="lesson-card__desc">Give Claude a persona — domain expert, writing coach, Socratic tutor — to unlock specialized knowledge modes.</div>
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            <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="12" r="10"/><polyline points="12 6 12 12 16 14"/></svg> 11 min
            <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"/></svg> 7 examples
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            <span class="lesson-card__num">CH·04</span>
            <span class="lesson-card__badge badge--intermediate">Intermediate</span>
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          <div class="lesson-card__title">Separating Data from Instructions</div>
          <div class="lesson-card__desc">Use XML tags and delimiters to cleanly separate your instructions from the data Claude should process.</div>
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            <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="12" r="10"/><polyline points="12 6 12 12 16 14"/></svg> 14 min
            <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"/></svg> 9 examples
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            <span class="lesson-card__num">CH·05</span>
            <span class="lesson-card__badge badge--intermediate">Intermediate</span>
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          <div class="lesson-card__title">Formatting Output & Speaking for Claude</div>
          <div class="lesson-card__desc">Control response structure with JSON, Markdown, lists, and prefill techniques. Make Claude start responses your way.</div>
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            <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="12" r="10"/><polyline points="12 6 12 12 16 14"/></svg> 15 min
            <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"/></svg> 10 examples
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            <span class="lesson-card__num">CH·06</span>
            <span class="lesson-card__badge badge--intermediate">Intermediate</span>
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          <div class="lesson-card__title">Precognition: Thinking Step by Step</div>
          <div class="lesson-card__desc">Unlock Chain-of-Thought reasoning. Make Claude reason before answering to dramatically improve accuracy.</div>
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            <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="12" r="10"/><polyline points="12 6 12 12 16 14"/></svg> 16 min
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            <span class="lesson-card__num">CH·07</span>
            <span class="lesson-card__badge badge--intermediate">Intermediate</span>
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          <div class="lesson-card__title">Using Examples (Few-Shot Prompting)</div>
          <div class="lesson-card__desc">Show, don't just tell. Learn zero-shot, one-shot, and few-shot techniques to guide format and style.</div>
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            <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="12" r="10"/><polyline points="12 6 12 12 16 14"/></svg> 13 min
            <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"/></svg> 7 examples
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            <span class="lesson-card__num">CH·08</span>
            <span class="lesson-card__badge badge--advanced">Advanced</span>
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          <div class="lesson-card__title">Avoiding Hallucinations</div>
          <div class="lesson-card__desc">Critical production technique. Teach Claude to say "I don't know" and stay grounded in provided context only.</div>
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            <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="12" r="10"/><polyline points="12 6 12 12 16 14"/></svg> 17 min
            <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"/></svg> 11 examples
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            <span class="lesson-card__num">CH·09</span>
            <span class="lesson-card__badge badge--advanced">Advanced</span>
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          <div class="lesson-card__title">Building Complex Prompts</div>
          <div class="lesson-card__desc">Combine all techniques for production systems. Industry use cases: chatbots, legal, financial services, and code.</div>
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            <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="12" r="10"/><polyline points="12 6 12 12 16 14"/></svg> 22 min
            <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"/></svg> 14 examples
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        <!-- Appendix -->
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            <span class="lesson-card__num">APP·A</span>
            <span class="lesson-card__badge badge--appendix">Appendix</span>
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          <div class="lesson-card__title">Chaining Prompts</div>
          <div class="lesson-card__desc">Build multi-step AI pipelines. Pass outputs as inputs, create reasoning chains, and design agentic workflows.</div>
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            <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="12" r="10"/><polyline points="12 6 12 12 16 14"/></svg> 18 min
            <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"/></svg> 9 examples
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          <div class="lesson-card__title">Tool Use & Search/Retrieval</div>
          <div class="lesson-card__desc">Extend Claude beyond its training data. Connect to APIs, databases, and real-time search with function calling.</div>
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            <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="12" r="10"/><polyline points="12 6 12 12 16 14"/></svg> 20 min
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