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presentation/2026-04-25-gdg-kolachi-cli-claude-code-gemini/index.html
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</div>
<!-- ============================================================ -->
<!-- SLIDE 6: Vibe Coding vs Agentic Engineering -->
<!-- SLIDE 8: Models &mdash; Brain, Knowledge Cut-off -->
<!-- ============================================================ -->
<div class="slide" data-slide="8">
<h1>&#x1F9E0; Models &mdash; e.g. Opus, GPT</h1>
<p>The <strong>model</strong> is the brain. It ships with everything it was trained on &mdash; and nothing else. Every model has a <strong>knowledge cut-off date</strong>.</p>
<div style="display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin: 32px 0;">
<div class="col-card" style="border-left: 4px solid #4caf50;">
<h4 style="color: #2e7d32; text-transform: none; letter-spacing: 0; margin-bottom: 10px;">&#x2705; Can answer</h4>
<p style="font-size: 1rem; color: #333; margin: 0 0 8px;"><em>&ldquo;What is the capital of Japan?&rdquo;</em></p>
<p style="font-size: 0.95rem; color: #555; margin: 0;">A fact that existed before the cut-off &mdash; already lives inside the brain.</p>
</div>
<div class="col-card" style="border-left: 4px solid #f44336;">
<h4 style="color: #c62828; text-transform: none; letter-spacing: 0; margin-bottom: 10px;">&#x274C; Can&rsquo;t answer</h4>
<p style="font-size: 1rem; color: #333; margin: 0 0 8px;"><em>&ldquo;Who won yesterday&rsquo;s match?&rdquo;</em></p>
<p style="font-size: 0.95rem; color: #555; margin: 0;">Anything after the cut-off date &mdash; the brain simply doesn&rsquo;t know it.</p>
</div>
</div>
<div class="trigger-box">
<h4>Example: Opus 4.7</h4>
<p>Anthropic&rsquo;s latest model has a knowledge cut-off of <strong>January 2026</strong>. It knows facts up to that date &mdash; anything after it is invisible to the raw model.</p>
</div>
</div>
<!-- ============================================================ -->
<!-- SLIDE 9: Model Limitations &mdash; Real-time access -->
<!-- ============================================================ -->
<div class="slide" data-slide="9">
<h1>&#x1F9E0; Limitations</h1>
<p>The raw model has <strong>no real-time access</strong> &mdash; no internet, no files, no clock. Ask it something happening right now, and it will tell you it can&rsquo;t help.</p>
<div style="text-align: center; margin: 24px 0;">
<img src="../assets/model/model-limitation.jpg" alt="Anthropic Workbench screenshot showing the model refusing a real-time weather query" style="max-width: 100%; max-height: 55vh; border-radius: 12px; box-shadow: 0 4px 24px rgba(0,0,0,0.12);" />
</div>
<p style="text-align: center; font-size: 0.95rem; color: #888; margin: 8px 0 0;"><em>Above: the model declining a weather query &mdash; &ldquo;I don&rsquo;t have real-time access.&rdquo;</em></p>
</div>
<!-- ============================================================ -->
<!-- SLIDE 6: Vibe Coding vs Agentic Engineering -->
<!-- ============================================================ -->
<div class="slide" data-slide="10">
<h1>Vibe Coding vs Agentic Engineering</h1>
<div class="two-col">
<div>
@@ -555,7 +591,7 @@ todoapp/
<!-- ============================================================ -->
<!-- SLIDE 7: What is Vibe Coding? -->
<!-- ============================================================ -->
<div class="slide" data-slide="9">
<div class="slide" data-slide="11">
<h1>What is Vibe Coding?</h1>
<div class="two-col" style="margin-top: 28px;">
<div class="col-card bad">
@@ -584,7 +620,7 @@ todoapp/
<!-- ============================================================ -->
<!-- SLIDE 8: Good vs Bad Prompts -->
<!-- ============================================================ -->
<div class="slide" data-slide="10">
<div class="slide" data-slide="12">
<h1>Good vs Bad Prompts</h1>
<p>Even before you set up any structure, <strong>how you prompt</strong> matters. Specific beats vague. Context beats assumption.</p>
<div class="two-col" style="margin-top: 28px;">
@@ -620,7 +656,7 @@ todoapp/
<!-- ============================================================ -->
<!-- SLIDE 9: Meet the Person — TOC -->
<!-- ============================================================ -->
<div class="slide" data-slide="11">
<div class="slide" data-slide="13">
<h1>Meet the Person</h1>
<p>We're going to learn five concepts using <strong>one running example</strong>: a weather reporter agent that fetches Dubai's temperature and renders a weather card. Same person &mdash; five different angles.</p>
<div class="toc-vertical">
@@ -667,14 +703,14 @@ todoapp/
<!-- ============================================================ -->
<!-- Slide 8: Agents Section Divider -->
<div class="slide section-slide" data-slide="12" data-level="agents">
<div class="slide section-slide" data-slide="14" data-level="agents">
<div class="section-number">Topic 1</div>
<h1>&#x1F464; Agents &mdash; The Weather Reporter</h1>
<p class="section-desc">An agent is Claude playing a specific role. Meet the <strong>weather reporter</strong> &mdash; a specialist hired to fetch and report weather data for Dubai. Same Claude, different hat.</p>
</div>
<!-- Slide 9: The Restaurant Kitchen -->
<div class="slide" data-slide="13">
<div class="slide" data-slide="15">
<h1>The Restaurant Kitchen</h1>
<div class="analogy-box">
<h4>Think of it like this</h4>
@@ -697,7 +733,7 @@ todoapp/
</div>
<!-- Slide 10: Prompting vs Agent table -->
<div class="slide" data-slide="14">
<div class="slide" data-slide="16">
<h1>Prompting vs. Agent &mdash; Side by Side</h1>
<p>The difference in one picture: <strong>prompting is asking a stranger on the street; using an agent is asking your dedicated specialist.</strong></p>
<table>
@@ -738,7 +774,7 @@ todoapp/
</div>
<!-- Slide 11: Agents Get Their Own Brain -->
<div class="slide" data-slide="15">
<div class="slide" data-slide="17">
<h1>Agents Get Their Own Brain</h1>
<div class="info-box">
<h4>Tip from Thariq (Anthropic) &mdash; Apr 16, 2026</h4>
@@ -771,7 +807,7 @@ todoapp/
</div>
<!-- Slide 12: How to Create an Agent -->
<div class="slide" data-slide="16">
<div class="slide" data-slide="18">
<h1>How to Create Your Own Agent</h1>
<p>You don't write an agent from scratch &mdash; Claude helps you build one. Type <code>/agents</code> inside Claude Code and a guided menu opens.</p>
<div class="how-to-trigger">
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</div>
<!-- Slide 13: Agent Config Fields -->
<div class="slide" data-slide="17">
<div class="slide" data-slide="19">
<h1>Agent Config Fields</h1>
<p>The config block at the top of an agent file controls its identity and capabilities. Here's what the real <code>weather-agent.md</code> uses:</p>
<div style="margin: 24px 0;">
@@ -862,14 +898,14 @@ todoapp/
<!-- ============================================================ -->
<!-- Slide 14: Skills Section Divider -->
<div class="slide section-slide" data-slide="18" data-level="skills">
<div class="slide section-slide" data-slide="20" data-level="skills">
<div class="section-number">Topic 2</div>
<h1>&#x1F393; Skills &mdash; What the Weather Reporter Knows</h1>
<p class="section-desc">Skills are the specific things the reporter has been trained to do. Our reporter has two: <strong>fetch the data</strong>, and <strong>render it as a card</strong>.</p>
</div>
<!-- Slide 15: The Training Manual -->
<div class="slide" data-slide="19">
<div class="slide" data-slide="21">
<h1>The Training Manual</h1>
<div class="analogy-box">
<h4>Think of it like this</h4>
@@ -896,7 +932,7 @@ todoapp/
</div>
<!-- Slide 16: When to Turn Something Into a Skill -->
<div class="slide" data-slide="20">
<div class="slide" data-slide="22">
<h1>When to Turn Something Into a Skill</h1>
<div class="info-box">
<h4>Tip from Boris Cherny (creator of Claude Code) &mdash; Feb 1, 2026</h4>
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</div>
<!-- Slide 17: Why Separate Agents and Skills? -->
<div class="slide" data-slide="21">
<div class="slide" data-slide="23">
<h1>Why Separate Agents and Skills?</h1>
<div class="two-col">
<div>
@@ -959,7 +995,7 @@ todoapp/
</div>
<!-- Slide 18: How to Create Your Own Skill -->
<div class="slide" data-slide="22">
<div class="slide" data-slide="24">
<h1>How to Create Your Own Skill</h1>
<p>Skills are plain markdown files. If you can write a recipe, you can write a skill.</p>
<div class="how-to-trigger">
@@ -1012,7 +1048,7 @@ Fetch the current temperature for Dubai, UAE.
</div>
<!-- Slide 19: Skill Config Fields -->
<div class="slide" data-slide="23">
<div class="slide" data-slide="25">
<h1>Skill Config Fields</h1>
<p>The small config block at the top of a SKILL.md (the "frontmatter") controls how the skill behaves:</p>
<div style="margin: 24px 0;">
@@ -1052,14 +1088,14 @@ Fetch the current temperature for Dubai, UAE.
<!-- ============================================================ -->
<!-- Slide 20: Context Section Divider -->
<div class="slide section-slide" data-slide="24" data-level="context">
<div class="slide section-slide" data-slide="26" data-level="context">
<div class="section-number">Topic 3</div>
<h1>&#x1F9E0; Context &mdash; The Reporter's Brain</h1>
<p class="section-desc">Now that you've met the reporter and know their skills, let's understand what they can actually hold in mind at once. Every agent &mdash; including the weather reporter &mdash; gets its own fresh brain.</p>
</div>
<!-- Slide 21: Claude's Brain -->
<div class="slide" data-slide="25">
<div class="slide" data-slide="27">
<h1>Claude's Brain</h1>
<div class="analogy-box">
<h4>Think of it like this</h4>
@@ -1097,7 +1133,7 @@ Fetch the current temperature for Dubai, UAE.
</div>
<!-- Slide 22: What Loads at Session Start -->
<div class="slide" data-slide="26">
<div class="slide" data-slide="28">
<h1>What Loads at Session Start</h1>
<p>The moment you open Claude Code, certain things land in Claude's brain <strong>before you've typed a word</strong>. The rest waits in the wings &mdash; only loaded when you actually need it. This is called <strong>progressive disclosure</strong>.</p>
<img src="../assets/concepts/context.jpg" alt="Diagram showing what loads into Claude's context window at session start" style="width: 100%; max-width: 800px; margin: 24px auto; display: block; border-radius: 8px;" />
@@ -1131,7 +1167,7 @@ Fetch the current temperature for Dubai, UAE.
</div>
<!-- Slide 23: Keep the Brain Clear -->
<div class="slide" data-slide="27">
<div class="slide" data-slide="29">
<h1>Keep the Brain Clear</h1>
<p>The more stuff crammed into Claude's brain, the harder it is to focus on what matters. This is called <strong>context rot</strong> &mdash; performance drops as the brain gets crowded.</p>
<div class="info-box">
@@ -1175,7 +1211,7 @@ Fetch the current temperature for Dubai, UAE.
</div>
<!-- Slide 24: How to Manage Your Context -->
<div class="slide" data-slide="28">
<div class="slide" data-slide="30">
<h1>How to Manage Your Context</h1>
<p>You can't <em>create</em> the context &mdash; it's just there, the moment you open a chat. But you can <strong>see</strong> how full it is, <strong>trim</strong> it down, or <strong>wipe</strong> it clean. Three commands give you full control.</p>
<div class="how-to-trigger">
@@ -1220,14 +1256,14 @@ Fetch the current temperature for Dubai, UAE.
<!-- ============================================================ -->
<!-- Slide 25: CLAUDE.md Section Divider -->
<div class="slide section-slide" data-slide="29" data-level="claude-md">
<div class="slide section-slide" data-slide="31" data-level="claude-md">
<div class="section-number">Topic 4</div>
<h1>&#x1F4CB; CLAUDE.md &mdash; The Reporter's Pocket Rulebook</h1>
<p class="section-desc">The weather reporter consults this at the start of every shift &mdash; even though their brain resets overnight. It's the standing instructions pinned in that brain before you've said a word.</p>
</div>
<!-- Slide 26: The Employee Handbook -->
<div class="slide" data-slide="30">
<div class="slide" data-slide="32">
<h1>The Employee Handbook</h1>
<div class="analogy-box">
<h4>Think of it like this</h4>
@@ -1255,7 +1291,7 @@ This is the Q2 marketing campaign brief &mdash; targeting small business owners.
</div>
<!-- Slide 27: How to Create CLAUDE.md -->
<div class="slide" data-slide="31">
<div class="slide" data-slide="33">
<h1>How to Create Your CLAUDE.md</h1>
<p>You don't need to write CLAUDE.md by hand. Claude can look at your project and draft one for you.</p>
<div class="how-to-trigger">
@@ -1300,7 +1336,7 @@ open, edit, save <span class="comment"># Tweak it like any doc</span><
</div>
<!-- Slide 28: Grow CLAUDE.md With Every Mistake -->
<div class="slide" data-slide="32">
<div class="slide" data-slide="34">
<h1>Grow CLAUDE.md With Every Mistake</h1>
<div class="info-box">
<h4>Tip from Boris Cherny (creator of Claude Code) &mdash; Feb 1, 2026</h4>
@@ -1337,7 +1373,7 @@ open, edit, save <span class="comment"># Tweak it like any doc</span><
</div>
<!-- Slide 29: What Goes in CLAUDE.md -->
<div class="slide" data-slide="33">
<div class="slide" data-slide="35">
<h1>What Goes in CLAUDE.md</h1>
<div class="code-block"><span class="comment"># CLAUDE.md</span>
@@ -1365,7 +1401,7 @@ This is a TodoApp with a FastAPI backend and React frontend.
</div>
<!-- Slide 30: How CLAUDE.md Loads -->
<div class="slide" data-slide="34">
<div class="slide" data-slide="36">
<h1>How CLAUDE.md Loads</h1>
<p>Claude Code uses two mechanisms to find CLAUDE.md files:</p>
<div class="two-col">
@@ -1398,14 +1434,14 @@ This is a TodoApp with a FastAPI backend and React frontend.
<!-- ============================================================ -->
<!-- Slide 31: Commands Section Divider -->
<div class="slide section-slide" data-slide="35" data-level="commands">
<div class="slide section-slide" data-slide="37" data-level="commands">
<div class="section-number">Topic 5</div>
<h1>&#x26A1; Commands &mdash; The Trigger</h1>
<p class="section-desc">One word kicks off the whole chain. <code>/weather-orchestrator</code> &rarr; agent &rarr; skill &rarr; SVG card. Commands are the entry point into any workflow.</p>
</div>
<!-- Slide 32: Commands — The Entry Point -->
<div class="slide" data-slide="36">
<div class="slide" data-slide="38">
<h1>Commands &mdash; The Entry Point</h1>
<div class="analogy-box">
<h4>Think of it like this</h4>
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</div>
<!-- Slide 33: How to Create Your Own Command -->
<div class="slide" data-slide="37">
<div class="slide" data-slide="39">
<h1>How to Create Your Own Command</h1>
<p>Commands are markdown files too. If you can write a recipe, you can write a command.</p>
<div class="how-to-trigger">
@@ -1504,14 +1540,14 @@ This is a TodoApp with a FastAPI backend and React frontend.
<!-- ============================================================ -->
<!-- Slide 34: Workflow Sub-Section (Putting It All Together) -->
<div class="slide section-slide" data-slide="38" data-level="workflow">
<div class="slide section-slide" data-slide="40" data-level="workflow">
<div class="section-number">Putting It All Together</div>
<h1>&#x1F3BC; Workflow &mdash; All Five Pieces Together</h1>
<p class="section-desc">Watch the weather reporter example run from one keystroke to SVG card output. Five concepts, one orchestrated flow.</p>
</div>
<!-- Slide 35: Command → Agent → Skill -->
<div class="slide" data-slide="39">
<div class="slide" data-slide="41">
<h1>Command &rarr; Agent &rarr; Skill</h1>
<p>This is the <strong>core architecture pattern</strong> of Claude Code workflows &mdash; demonstrated in this very repo by the weather example:</p>
<div class="code-block"><span class="comment">The Orchestration Flow</span>
@@ -1538,7 +1574,7 @@ This is a TodoApp with a FastAPI backend and React frontend.
</div>
<!-- Slide 36: Two Ways Skills Are Used -->
<div class="slide" data-slide="40">
<div class="slide" data-slide="42">
<h1>Two Ways Skills Are Used</h1>
<p>The weather workflow demonstrates both skill patterns in a single flow:</p>
<div class="two-col">
@@ -1561,7 +1597,7 @@ This is a TodoApp with a FastAPI backend and React frontend.
</div>
<!-- Slide 37: How to Wire Your Own Workflow -->
<div class="slide" data-slide="41">
<div class="slide" data-slide="43">
<h1>How to Wire Your Own Workflow</h1>
<p>A workflow isn't a separate file type. It <em>emerges</em> when one command calls agents and skills in sequence.</p>
<div class="how-to-trigger">
@@ -1612,7 +1648,7 @@ This is a TodoApp with a FastAPI backend and React frontend.
<!-- ============================================================ -->
<!-- SLIDE 40: Closing -->
<!-- ============================================================ -->
<div class="slide title-slide" data-slide="42">
<div class="slide title-slide" data-slide="44">
<h1>Journey So Far</h1>
<p class="subtitle">Five concepts, one running example</p>
<p style="margin-top: 20px; font-size: 1.1rem; color: #666; max-width: 640px;">From meeting the weather reporter to wiring the full <strong>Command &rarr; Agent &rarr; Skill</strong> chain. The same five pieces compose every workflow you'll ever build.</p>