Build & Sell with Claude Code — The 10-Hour Course Distilled

Claude Code isn't just a coding assistant — it's an autonomous agent platform that rewrites how software gets built. This post distills 10+ hours of course content into the key mental models, hacks, and business frameworks you actually need.

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🧠 The Core Mental Model — What Claude Code Actually Is

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Claude Code runs in your terminal and can read files, write code, run commands, browse the web, spin up sub-agents, and self-correct — all without you babysitting every step.

Think of it less like GitHub Copilot and more like a junior developer you can delegate entire projects to.

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The Three Layers of Claude Code

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How a Session Actually Works

flowchart LR
    A([You]) --> B[Main Claude Code Session]
    B -->|delegates| C[Sub-agent 1\nResearch]
    B -->|delegates| D[Sub-agent 2\nTesting]
    B -->|delegates| E[Sub-agent 3\nCode Review]
    C --> F([Main session\nreceives report])
    D --> F
    E --> F
    style B fill:#4A90D9,color:#fff
    style C fill:#5BA85A,color:#fff
    style D fill:#E8A838,color:#fff
    style E fill:#9B6EBD,color:#fff
    style F fill:#4A90D9,color:#fff

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⚙️ Context Management — The #1 Thing Beginners Get Wrong

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Context rot is real. When your context window fills up, output quality degrades — and if you're running 10+ sessions in parallel, you often won't notice until it's too late.

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The Context Hygiene Playbook

1. Keep CLAUDE.md lean — 100–200 lines max. Every line is injected into every session. Route non-essential docs to external files and just reference them.
2. Use /compact at 60% — Compress history mid-session, keeping only critical decisions. You can tell it what to keep: /compact but keep all API integration decisions.
3. Use /clear between tasks — Wipe history when switching topics. Your CLAUDE.md and files persist; your conversation doesn't.
4. Run /context — See exactly what's eating your tokens. MCP servers can be surprisingly expensive — sometimes a direct API endpoint costs far fewer tokens.
5. Max 3–4 parallel sessions — More than that and you lose track of what's going on. Quality over quantity.

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Sub-agents for Heavy Lifting

If you have a 15-minute YouTube transcript to analyse, don't let your main session read it. Delegate to a sub-agent: "read this, give me the key highlights." Keep the main thread clean.

flowchart TD
    A[Main Session\n~Clean context] -->|"Read 200-page PDF\nSummarise findings"| B[Sub-agent\nHaiku model\nCheap + fast]
    B -->|"3-bullet summary"| A
    style A fill:#4A90D9,color:#fff
    style B fill:#5BA85A,color:#fff

Tip: Use Haiku for sub-agents doing heavy data processing (scraping, summarising, reading large files). Reserve Sonnet/Opus for the main thread where quality matters.

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🔧 Git, GitHub & Work Trees — Safe Parallel Development

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Git Concepts in 60 Seconds

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Git Work Trees — Run Multiple Sessions Safely

The problem: normally you can only work on one branch at a time. Switch branches and you risk losing in-progress work.

The solution: work trees give each Claude Code session its own isolated branch and folder — no risk of agents overwriting each other.

# Each terminal gets its own workspace + branch
claude --worktree feature-login
claude --worktree bugfix-api

Note: Claude Code has native work tree support built in. You can run 4–5 parallel sessions on the same project and merge them all back to main cleanly when done.

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🤖 Browser Automation — When There's No API

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Claude Code can launch a real browser, fill out forms, click buttons, scrape pages, and run QA loops — even on sites where you're already logged in.

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The QA Self-Checking Loop

flowchart LR
    A[Build feature] --> B[Take screenshot]
    B --> C{Looks right?}
    C -->|No| D[Identify bugs\nfrom screenshot]
    D --> E[Fix code]
    E --> A
    C -->|Yes| F[Open Chrome DevTools\nCheck for JS errors]
    F -->|Errors found| D
    F -->|Clean| G[✅ Ship]
    style A fill:#4A90D9,color:#fff
    style G fill:#5BA85A,color:#fff
    style D fill:#D9534F,color:#fff

Warning: Browser automation is iterative — expect 4–5 loops before a script runs cleanly. That's normal, not a failure. Each run, the script gets smarter.

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Persistent Login Sessions

Claude Code can use your existing Chrome profile, meaning it can interact with platforms where you're already logged in — Notion, CRMs, school communities, etc. First run requires manual login; subsequent runs use the saved session.

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🛠️ The 32 Claude Code Hacks — Ranked by Impact

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Beginner Hacks (1–10)

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Intermediate Hacks (11–22)

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Advanced Hacks (23–32)

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💼 Building a Business with Claude Code

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The Core Mindset Shift

Stop selling AI agents. Start selling outcomes tied to real business pain.

Businesses don't care if you used Claude Code, n8n, or duct tape. They care about time saved, money saved, and fewer errors.

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The Diagnose → Solve → Value → Price Framework

flowchart LR
    A[🔍 Diagnose\nFind the pain point] --> B[🔧 Solve\nBuild the system]
    B --> C[💰 Value\nTranslate to numbers]
    C --> D[🏷️ Price\nAnchor to ROI]
    style A fill:#4A90D9,color:#fff
    style B fill:#5BA85A,color:#fff
    style C fill:#E8A838,color:#fff
    style D fill:#9B6EBD,color:#fff

Example: Client onboarding automation

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How to Get Your First Clients (No Audience Needed)

Three methods, in order of effectiveness when starting out:

1. Warm Outreach (Start Here)

Build a "trust map" — list 20 people you already know who run businesses. Reach out not to pitch, but to learn:

"I'm mapping the top time drains in your industry. Can I ask you 10 minutes of questions? No pitch."

2. Referrals

After delivering value, ask the golden question: "Do you know any other business owners who might benefit from this?"

Tip: Only 11% of salespeople ask for referrals — yet 91% of happy clients would give one if asked. Ask every time.

3. The Trojan Horse Method (Highest Leverage)

Partner with agencies, consultants, and coaches who already have client relationships. Offer:

• Free AI discovery calls for their clients
• 20% rev share on any projects you close
• They look like heroes for bringing in an expert; you get warm introductions

Note: Partner-sourced deals close 46% faster than cold outreach. You borrow trust instead of building it from scratch.

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Value-Based Pricing — The Simple Math

Annual cost of manual process = (hours/week × 52) × hourly_rate
Your target price ≈ 10–15% of annual savings

Real example:

• 20 leads/week, 1 hr each to qualify → 20 hrs/week × $40/hr = **$38,400/year**
• Automated 80% → $30,720 saved/year
• Project price: 15% × $38,400 = **$5,760** → they see 5× ROI in year 1 alone

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The PRICE Framework

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🚀 Delivery & Handover — The Professional Way

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The Three Hosting Options

Danger: Never run multiple clients on a single shared instance without a commercial license. This violates most automation platform terms of service.

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The QA Loop Before Handover

flowchart TD
    A[Internal QA\nTest with real sample data] --> B{Pass?}
    B -->|No| C[Fix bugs\nUpdate prompts]
    C --> A
    B -->|Yes| D[Client QA\nSimple UI / form to test]
    D --> E{Client happy?}
    E -->|No| F[Prompt tuning\nMinor tweaks]
    F --> D
    E -->|Yes| G[Push to Production]
    style G fill:#5BA85A,color:#fff
    style C fill:#D9534F,color:#fff
    style F fill:#E8A838,color:#fff

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Scope Creep — Protect Yourself

Define the exact list of functionality in the contract. When clients ask for more during the build:

"Love that idea — I'll add it to the V2 backlog. For this version, we're locking scope so I can deliver on time."

This plants the seed for future work and protects your margins.

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💡 One-Sentence Intuition

Claude Code turns you into a manager, not a coder — your job is to give clear goals, steer agents when they drift, and stack proof until you're the AI partner businesses can't afford to lose.

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🔗 Related Resources

• Claude Code Docs
• Context7 MCP — live library documentation injection
• Pixel Agents VS Code Extension — visualise your agents as pixel art characters (Windows only for now)

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▶ Watch on YouTube

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Part of the AI Tools & Automation series. Next: running Claude Code on a VPS for always-on autonomous agents.