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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=1600">
<title>Master Claude Code — The Complete Guide (February 2026)</title>
<style>
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/* ── SECTIONS ── */
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/* ── COMPARISON TABLE (Section 1) ── */
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/* ── CAPABILITY CARDS (Section 2) ── */
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/* ── WORKFLOW (Section 3) ── */
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/* ── GETTING STARTED (Section 4) ── */
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/* ── COMMANDS SUMMARY (Section 6) ── */
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/* ── SKILLS & CLAUDE.MD (Section 7) ── */
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/* ── PROMPTING (Section 8) ── */
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/* ── PRICING (Section 9) ── */
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/* ── DARK SECTION ── */
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</style>
</head>
<body>
<!-- ══════ HERO ══════ -->
<section class="hero">
<div class="hero-top">
<div>
<h1>Master <span>Claude Code</span></h1>
<p class="hero-sub">The Complete Guide for Everyone — Updated February 2026</p>
</div>
<div class="hero-right-group">
<div class="hero-badge">Updated February 2026</div>
<div class="hero-models">Opus 4.6 • Sonnet 4.5 • Haiku</div>
<div style="margin-top: 8px;"><a href="https://twitter.com/ersinyilmaz?ref_src=twsrc%5Etfw" class="twitter-follow-button" data-show-count="false">Follow @ersinyilmaz</a><script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script></div>
</div>
</div>
</section>
<!-- ══════ 1. WHY CLAUDE CODE ══════ -->
<section class="section">
<div class="section-header">
<div class="section-num">1</div>
<div class="section-title">Why Claude Code Changes Everything</div>
</div>
<div class="compare-grid">
<div class="compare-col chat">
<h3>💬 Chat Window</h3>
<div class="compare-item"><span class="icon">❌</span> Upload limits</div>
<div class="compare-item"><span class="icon">❌</span> Sessions expire</div>
<div class="compare-item"><span class="icon">❌</span> You do everything</div>
<div class="compare-item"><span class="icon">❌</span> Copy-paste results</div>
</div>
<div class="compare-col vs">vs</div>
<div class="compare-col code">
<h3>⚡ Claude Code</h3>
<div class="compare-item"><span class="icon">✅</span> Full system access, any file</div>
<div class="compare-item"><span class="icon">✅</span> Hours-long persistent tasks</div>
<div class="compare-item"><span class="icon">✅</span> AI teammates & subagents</div>
<div class="compare-item"><span class="icon">✅</span> Direct file & system changes</div>
</div>
</div>
<p class="tagline">"From Assistant to Operating System — a capable teammate who can actually execute."</p>
</section>
<div class="divider"></div>
<!-- ══════ 2. CAPABILITIES ══════ -->
<section class="section">
<div class="section-header">
<div class="section-num">2</div>
<div class="section-title">What Claude Code Can Do</div>
</div>
<div class="cap-grid">
<div class="cap-card">
<div class="cap-icon">📁</div>
<div class="cap-title">Full File System Access</div>
<div class="cap-desc">Read, write, create, organize any file on your computer. No upload limits, no restrictions.</div>
<div class="cap-impact">"Process 10,000 files in minutes"</div>
</div>
<div class="cap-card">
<div class="cap-icon">⌨</div>
<div class="cap-title">Tool & Command Execution</div>
<div class="cap-desc">Run shell commands, execute scripts, manage Git, install packages — all through natural language.</div>
<div class="cap-impact">"Non-coders running bash without syntax"</div>
</div>
<div class="cap-card">
<div class="cap-icon">🔌</div>
<div class="cap-title">MCP Connections (200+)</div>
<div class="cap-desc">Connect to GitHub, Notion, Slack, Jira, databases, APIs. One interface for your entire tool ecosystem.</div>
<div class="cap-impact">"USB-C for AI: one protocol, all tools"</div>
</div>
<div class="cap-card">
<div class="cap-icon">🤖</div>
<div class="cap-title">Multi-Agent Work</div>
<div class="cap-desc">Subagents work in parallel, checkpoints let you rewind, background tasks run while you work.</div>
<div class="cap-impact">"Like having 5 junior developers"</div>
</div>
</div>
</section>
<div class="divider"></div>
<!-- ══════ 3. WORKFLOW ══════ -->
<section class="section">
<div class="section-header">
<div class="section-num">3</div>
<div class="section-title">The Claude Code Workflow</div>
</div>
<div class="workflow">
<div class="wf-step">
<div class="wf-step-title">Analyze & Research</div>
<ul>
<li>Synthesize feedback</li>
<li>Research competitors</li>
<li>Read & summarize files</li>
<li>Extract insights</li>
</ul>
</div>
<div class="wf-arrow">➔</div>
<div class="wf-step">
<div class="wf-step-title">Plan & Decide</div>
<ul>
<li>Draft PRDs from notes</li>
<li>Create roadmap priorities</li>
<li>Generate strategy options</li>
<li>Build decision frameworks</li>
</ul>
</div>
<div class="wf-arrow">➔</div>
<div class="wf-step">
<div class="wf-step-title">Create & Execute</div>
<ul>
<li>Write code & prototypes</li>
<li>Generate presentations</li>
<li>Create reports & docs</li>
<li>Build dashboards</li>
</ul>
</div>
<div class="wf-arrow">➔</div>
<div class="wf-step">
<div class="wf-step-title">Scale & Repeat</div>
<ul>
<li>Set up recurring workflows</li>
<li>Connect tools via MCP</li>
<li>Create reusable skills</li>
<li>Schedule batch tasks</li>
</ul>
</div>
</div>
<div class="wf-examples">
<div class="wf-ex"><strong>For Product Managers</strong>Meeting transcript → PRD auto-drafted</div>
<div class="wf-ex"><strong>For Developers</strong>Code review → Jira tickets created</div>
<div class="wf-ex"><strong>For Data Teams</strong>Dashboard data → Slack summary posted</div>
</div>
</section>
<div class="divider"></div>
<!-- ══════ 4. GETTING STARTED ══════ -->
<section class="section">
<div class="section-header">
<div class="section-num">4</div>
<div class="section-title">Getting Started</div>
</div>
<div class="gs-grid">
<div class="gs-box">
<h4>💻 Setup (Mac/Linux)</h4>
<div class="code-block"><span class="code-comment"># Install Claude Code</span>
curl -fsSL https://claude.ai/install.sh | bash
<span class="code-comment"># Navigate to your project</span>
cd ~/your-project-folder
claude</div>
<h4 style="margin-top: 18px;">🏸 Windows (PowerShell)</h4>
<div class="code-block">irm https://claude.ai/install.ps1 | iex
<span class="code-comment"># Then navigate to your folder</span>
cd ~\your-project-folder
claude</div>
</div>
<div class="gs-box">
<h4>☑ Requirements</h4>
<ul class="req-list">
<li>macOS 13+, Ubuntu 20+, or Windows 10+</li>
<li>Git Bash or WSL for Windows</li>
<li>Node.js 18+ (bundled with installer)</li>
<li>Claude Pro ($20/mo) or Max ($100-200/mo)</li>
<li>Or API credits (pay-per-use)</li>
</ul>
<h4 style="margin-top: 18px;">💡 Best Experience</h4>
<ul class="req-list">
<li>Cursor IDE or VS Code + integrated terminal</li>
<li>iTerm2 / Warp for terminal (macOS)</li>
<li>Multiple terminal tabs for parallel sessions</li>
<li>System notifications enabled (idle alerts)</li>
</ul>
</div>
</div>
</section>
<div class="divider"></div>
<!-- ══════ 5. MCP ══════ -->
<section class="section">
<div class="section-header">
<div class="section-num">5</div>
<div class="section-title">Connect Everything (MCP)</div>
</div>
<p style="font-size: 15px; color: var(--gray-700); margin-bottom: 18px;"><strong>Model Context Protocol</strong> — an open standard that connects Claude to your tools. Think of it as USB-C for AI: one protocol, hundreds of connections.</p>
<div class="mcp-grid">
<div class="mcp-cat">
<div class="mcp-cat-title">Developer Tools</div>
<div class="mcp-tools">
<span class="mcp-tool">GitHub</span>
<span class="mcp-tool">Sentry</span>
<span class="mcp-tool">Linear</span>
<span class="mcp-tool">GitLab</span>
<span class="mcp-tool">Jira</span>
</div>
</div>
<div class="mcp-cat">
<div class="mcp-cat-title">Productivity</div>
<div class="mcp-tools">
<span class="mcp-tool">Notion</span>
<span class="mcp-tool">Slack</span>
<span class="mcp-tool">Google Drive</span>
<span class="mcp-tool">Todoist</span>
</div>
</div>
<div class="mcp-cat">
<div class="mcp-cat-title">Data & Research</div>
<div class="mcp-tools">
<span class="mcp-tool">Perplexity</span>
<span class="mcp-tool">PostgreSQL</span>
<span class="mcp-tool">Brave</span>
<span class="mcp-tool">Filesystem</span>
</div>
</div>
<div class="mcp-cat">
<div class="mcp-cat-title">Communication</div>
<div class="mcp-tools">
<span class="mcp-tool">Gmail</span>
<span class="mcp-tool">Typefully</span>
<span class="mcp-tool">Buffer</span>
<span class="mcp-tool">Discord</span>
</div>
</div>
</div>
<div class="code-block" style="font-size: 13px;">claude mcp add --transport http https://mcp.notion.com/mcp <span class="code-comment"># Quick add any MCP server</span></div>
</section>
<div class="divider"></div>
<!-- ══════ 6. ESSENTIAL COMMANDS ══════ -->
<section class="section">
<div class="section-header">
<div class="section-num">6</div>
<div class="section-title">Essential Commands</div>
</div>
<div class="cmd-grid">
<div class="cmd-card">
<div class="cmd-card-title">Slash Commands</div>
<div class="cmd-mini">
<strong>/clear</strong> — Reset context<br>
<strong>/compact</strong> — Compress to save tokens<br>
<strong>/context</strong> — Visualize context usage<br>
<strong>/model</strong> — Switch model + effort<br>
<strong>/cost</strong> — Token & cost usage<br>
<strong>/tasks</strong> — Background tasks<br>
<strong>/plan</strong> — Enter plan mode<br>
<strong>/rewind</strong> — Rewind conversation
</div>
</div>
<div class="cmd-card">
<div class="cmd-card-title">Keyboard Shortcuts</div>
<div class="cmd-mini">
<strong>Esc</strong> — Cancel/Stop<br>
<strong>Esc+Esc</strong> — Rewind checkpoint<br>
<strong>Shift+Tab</strong> — Cycle permission modes<br>
<strong>Ctrl+V</strong> — Paste image<br>
<strong>Alt+T</strong> — Extended Thinking<br>
<strong>Ctrl+B</strong> — Background task<br>
<strong>@</strong> — File mention<br>
<strong>!</strong> — Run shell directly
</div>
</div>
<div class="cmd-card">
<div class="cmd-card-title">CLI Flags</div>
<div class="cmd-mini">
<strong>-p "query"</strong> — Print mode<br>
<strong>-c / --continue</strong> — Continue session<br>
<strong>-r / --resume</strong> — Resume session<br>
<strong>--add-dir</strong> — Add directory<br>
<strong>--chrome</strong> — Browser mode<br>
<strong>--remote</strong> — Web session<br>
<strong>--max-budget-usd</strong> — Cost limit<br>
<strong>--json-schema</strong> — Structured output
</div>
</div>
</div>
</section>
<div class="divider"></div>
<!-- ══════ 7. SKILLS & CLAUDE.MD ══════ -->
<section class="section">
<div class="section-header">
<div class="section-num">7</div>
<div class="section-title">Skills & CLAUDE.md</div>
</div>
<div class="sc-grid">
<div class="sc-box">
<h4>⚡ Claude Skills (Reusable Automations)</h4>
<p style="font-size: 14px; color: var(--gray-700); margin-bottom: 14px;">Task-specific instruction packages that Claude auto-loads when relevant.</p>
<div class="code-block" style="font-size: 12.5px;"><span class="code-comment"># Folder Structure</span>
~/.claude/skills/
├── data-cleaner/
│ └── SKILL.md
├── prd-generator/
│ └── SKILL.md
└── linkedin-writer/
└── SKILL.md</div>
<p style="font-size: 13px; color: var(--gray-500); margin-top: 12px;"><strong>Built-in:</strong> docx, xlsx, pptx, pdf processing</p>
</div>
<div class="sc-box">
<h4>📚 CLAUDE.md (Project Memory)</h4>
<p style="font-size: 14px; color: var(--gray-700); margin-bottom: 14px;">A markdown file that gives Claude permanent context about your project.</p>
<div class="code-block" style="font-size: 12.5px;"><span class="code-comment"># Project: Marketing Dashboard</span>
## Key Commands
- npm run build
- npm test
## Style Guide
- Use TypeScript
- Follow existing patterns
## Important Context
- Data source: /data/analytics.csv
- Deploy target: Vercel</div>
<p style="font-size: 13px; color: var(--gray-500); margin-top: 12px;">
<strong>Global:</strong> ~/.claude/CLAUDE.md •
<strong>Project:</strong> .claude/CLAUDE.md •
<strong>Local:</strong> .claude/CLAUDE.local.md
</p>
</div>
</div>
</section>
<div class="divider"></div>
<!-- ══════ 8. PROMPTING TECHNIQUES ══════ -->
<section class="section">
<div class="section-header">
<div class="section-num">8</div>
<div class="section-title">Prompting Techniques</div>
</div>
<table class="prompt-table">
<thead>
<tr><th>Technique</th><th>When to Use</th><th>Example</th></tr>
</thead>
<tbody>
<tr><td><strong>Be Specific</strong></td><td>Always</td><td>"Remove rows where column B is empty" not "Clean this CSV"</td></tr>
<tr><td><strong>Give Examples</strong></td><td>Output formatting</td><td>Show 1-2 examples of what you want</td></tr>
<tr><td><strong>Chain Steps</strong></td><td>Complex tasks</td><td>"First analyze, then summarize, then create action items"</td></tr>
<tr><td><strong>Set Constraints</strong></td><td>Quality control</td><td>"Max 500 words" or "Only use data from 2024"</td></tr>
<tr><td><strong>Assign Roles</strong></td><td>Expertise needed</td><td>"Act as a senior data analyst reviewing this dataset"</td></tr>
<tr><td><strong>Use /clear Often</strong></td><td>Between tasks</td><td>Reset context between unrelated work to avoid confusion</td></tr>
</tbody>
</table>
<div class="pro-box">
<h4>🏆 Pro Pattern: Checkpoint + Iterate</h4>
<ol class="pro-steps">
<li>Ask Claude to make a plan first (use Plan mode via Shift+Tab)</li>
<li>Review the plan until you like it</li>
<li>Let it create checkpoints as it executes</li>
<li>Rewind (Esc twice) if something goes wrong</li>
<li>Iterate with specific feedback until perfect</li>
</ol>
</div>
</section>
<div class="divider"></div>
<!-- ══════ 9. MODELS & PRICING ══════ -->
<section class="section">
<div class="section-header">
<div class="section-num">9</div>
<div class="section-title">Models & Pricing</div>
</div>
<div class="price-grid">
<div>
<table class="price-table">
<thead><tr><th>Model</th><th>Best For</th><th>Notes</th></tr></thead>
<tbody>
<tr><td class="model-name">Opus 4.6</td><td>Deep reasoning, architecture</td><td>Default for Max plan</td></tr>
<tr><td class="model-name">Sonnet 4.5</td><td>Daily coding, fast execution</td><td>Default for Pro plan</td></tr>
<tr><td class="model-name">Haiku</td><td>Quick tasks, simple queries</td><td>Cheapest, fastest</td></tr>
</tbody>
</table>
<p style="font-size: 13px; color: var(--gray-500); margin-top: 12px;">
<strong>Effort Levels</strong> (Opus 4.6): Low → Medium → High •
<strong>Fast Mode</strong> available •
<strong>Extended:</strong> sonnet[1m] for 1M token context
</p>
</div>
<div>
<table class="price-table">
<thead><tr><th>Plan</th><th>Monthly</th><th>Best For</th></tr></thead>
<tbody>
<tr><td><strong>Pro</strong></td><td>$20</td><td>Light usage, short tasks</td></tr>
<tr><td><strong>Max 5x</strong></td><td>$100</td><td>Daily use, larger projects</td></tr>
<tr><td><strong>Max 20x</strong></td><td>$200</td><td>Power users, heavy automation</td></tr>
<tr><td><strong>API</strong></td><td>Pay-per-use</td><td>CI/CD, enterprise pipelines</td></tr>
</tbody>
</table>
</div>
</div>
</section>
<!-- ══════ FOOTER ══════ -->
<div class="footer">
<span><span class="footer-badge">Built with Claude Code</span> Master Claude Code • <strong>February 2026</strong></span>
<span>Opus 4.6 • Sonnet 4.5 • Haiku • 200+ MCP Connections</span>
</div>
</body>
</html>