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    Code with Antonio
    Build Your Own Claude Code

    Cohort-based Course

    Build Your Own Claude Code

    Learn how to code like Antonio by building an agentic coding harness you understand, can extend, and can adapt to your own workflow and future tools.

    Hosted by
    Antonio
    Antonio

    Antonio is a passionate coder and the creative mind behind codewithantonio.com.

    2-week learning cohort • Starting May 4th • $297

    40% off — Sale ends Apr 28! Only 6 days left.

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    Antonio does it again. This time with a Trello clone. Antonio's tutorials really are the gold standard for comprehensive, long form instruction 👏👏👏

    Martin Casado

    "Wait — isn't this going to be on YouTube anyway?"

    No. These are two different products:

    • The cohort — 6 days of workshop modules, daily prompts, Discord throughout, and office hours with Antonio. Not going to YouTube.
    • Building NightCode — a separate long-form tutorial. Goes free on YouTube May 18. Cohort members get it a month early.

    The cohort and NightCode are different products. One doesn't become the other.


    I have a confession.

    I don't build the way I teach.

    For years, you've watched me code projects step-by-step. Every line typed by hand. Clean. Sequential. Great for learning.

    But that's not how I work anymore.

    Today, I explain what I want to an AI agent — the same way I'd explain it to you in a video — and it builds everything. I architect, steer, and review. The agent handles the implementation.

    The explanation is the code.

    Not vibe coding. Not copy-pasting ChatGPT. A real engineering workflow where AI agents write, test, and ship production code while I make the decisions that matter.

    This cohort teaches you that workflow by building the tool that powers it.

    The tutorial gap

    Here's the problem with coding tutorials — including mine:

    01
    They show the finished path. Every step planned, every file in place. Real development doesn't work that way.
    02
    They hide the real workflow. The one where AI agents do the heavy lifting and you do the engineering.

    You can follow along with any tutorial and build a full-stack app. But can you build one from a blank terminal, steering an AI agent as your only teammate?

    That's the skill this cohort gives you.


    What you'll actually build

    Over 6 learning days, you'll build Claude Code — a fully functional AI-powered coding CLI — from scratch.

    Not a demo. Not a walkthrough you'll forget next week. A real tool:

      • AI agent integration that reads, writes, and modifies code
      • A harness architecture you design and own
      • Custom theming and personalization
      • The same agentic patterns used in production coding tools

    Every day ends with a working milestone. Day 1, you ship something that runs. By Day 6, you have a complete CLI.

    You're not watching me build it. You're building it.


    This isn't another "follow along" course

    Before: Free on YouTube (May 18+)

    Building NightCode — one long-form tutorial

    Watch me type every line

    No Discord, no Q&A

    When it drops, that's it

    Linear build-along

    After: The Cohort (paid)

    6 workshop modules — your build, your pace

    Prompts, not scripts — you steer, agents implement

    Discord throughout + office hours with Antonio

    One working build per day, across 2 weeks — yours for life

    Your tool, your decisions — not a clone of mine


    How the cohort works

    6 focused days. 2 weeks. 1-2 hours per day.

    Pre-recorded lessons drop on Monday, Wednesday, and Friday. Work at your pace. Each session is built around a specific milestone — you won't leave a day without something that works.

    The Discord stays active throughout. Ask questions, share progress, troubleshoot together.


    Your 2-week roadmap

    Day 1 — Your first working CLI

    Scaffold the project, wire up the foundation, and ship a CLI that runs. You leave Day 1 with something you can demo in the terminal.

    Day 2 — Connecting the AI brain

    Integrate AI agents into your CLI. Structure prompts, handle responses, and build the harness that makes agentic coding work.

    Day 3 — The coding harness

    The core architecture. Build the system that reads, writes, and modifies code files through your CLI — the engine behind everything.

    Day 4 — Agentic workflows in practice

    Stop typing code line by line. Learn the patterns that let AI agents handle implementation while you steer architecture and quality.

    Day 5 — Theming and customization

    Make it yours. Add themes, personalization, and the polish that turns a project into your tool.

    Day 6 — Ship it

    Final integration. Testing. Polish. Walk away with a complete AI coding CLI that you built from nothing, understand completely, and own.


    Why build your own coding CLI?

    You might be wondering: "Why build a CLI when Claude Code and Cursor already exist?"

    Three reasons:

    1. You'll understand how these tools actually work. Not surface-level. The harness, the agent loop, the context management — all of it. When you build the machine, you understand the machine.

    2. You can customize it. Your workflow. Your themes. Your rules. Production tools are generic by design. Yours doesn't have to be.

    3. It's the best way to learn agentic development. Building an AI coding tool with AI coding tools is the tightest feedback loop you'll ever experience. You learn the workflow by using it to build the workflow.


    This is how I actually build

    When I record a tutorial, I type every line on camera. Clean. Deliberate. Easy to follow.

    When I'm building my real projects? I describe what I want. The AI agent writes it. I review, refine, iterate.

    The architecture is mine. The decisions are mine. The implementation is the agent's.

    I explain to the AI the same way I'd explain it to you. The skill that makes me a good teacher is the same skill that makes me productive with AI. This cohort teaches you both.


    What's included

    For just $495 $297 — save 40% during launch! you get:

    The cohort — yours, for life:

    • 6 workshop modules — one working build per day.
    • The complete source code — clone it, extend it, ship it.
    • Discord community throughout the run. Ask questions, share progress, get help.
    • Live office hours with Antonio. Submit questions ahead if you can't make it.
    • Every recording and transcript, yours to keep.

    Bonus for cohort members — also free on YouTube May 18:

    • Early access to Building NightCode — the long-form code-along. You get it a month before the public.

    Frequently Asked Questions

    Is the cohort going to YouTube later?

    No. The 6 cohort workshops, the Discord, and the office hours are cohort-only. What goes to YouTube on May 18 is a separate tutorial called Building NightCode — a long-form code-along, not the 6 cohort workshops. Cohort members get NightCode a month early and keep the cohort material for life.

    I already have a lifetime subscription from the old site — do I need the cohort?

    Your lifetime gets you early access to Building NightCode — same as cohort members. It doesn't include the 6 cohort workshops, the Discord, or the office hours. NightCode is the code-along; the cohort is you actually building it, with prompts and live time with Antonio. If you want to watch, your lifetime already covers that. If you want to build it with structure and a room of other developers doing the same, the cohort is the add.

    What skill level do I need?

    Comfortable with TypeScript and the command line. If you've followed my tutorials before, you're ready.

    Do I need specific AI tools or subscriptions?

    You'll need a terminal coding agent and an active subscription or API access to run it. Any of the three major options works — Claude Code, Codex, or OpenCode — since the workshop focuses on how you think, specify, and prompt rather than features unique to any one tool.

    Recommended pairings:

    • Claude Code with an Anthropic Max subscription — cheapest and most optimized way to run Claude models.
    • Codex with a ChatGPT Plus subscription (~$20/month) — currently the best bang-for-buck if you want access to GPT-5.4.
    • OpenCode with any provider you already use (OpenAI, Zen, Fireworks, etc.) — provider-agnostic, lets you switch models mid-session. Note: sharing an Anthropic subscription directly with OpenCode risks a ban, so use an API key or Zen credits instead.

    Budget option: OpenCode Go gives you access to open-source models like GLM, Kimi, and Minimax for $5 the first month and $10/month after.

    Full setup instructions (including Bun, npx skills, and provider connection) are provided after enrollment.

    How much time per day?

    1-2 hours on learning days (Monday, Wednesday, Friday). Content is pre-recorded — work at your own pace.

    Do I keep access forever?

    Yes. Lessons, code, recordings, transcripts — all yours to keep.

    What if I fall behind?

    Content is self-paced. Discord stays active. Catch up whenever you want.

    What's the refund policy?

    30-day refund policy. Contact team@codewithantonio.com.

    More questions?

    Email team@codewithantonio.com.


    Your learning schedule

      Day 1Before You Start
      Available from April 20, 2026

      1. Introduction
      2. Environment & Tooling
      3. Expected Outcome
      Day 2Scaffolding
      Available from May 4, 2026

      1. Monorepo & Package Structure
      2. CLI Foundation
      3. Connecting CLI to Server
      Day 3Streaming
      Available from May 6, 2026

      1. AI Streaming
      2. Chat Loop
      3. Database Persistence
      Day 4Agents & Tools
      Available from May 8, 2026

      1. Tool Registration & Execution
      2. The System Prompt
      3. Modes & Permissions
      Day 5Interface
      Available from May 11, 2026

      1. Keyboard & Focus Management
      2. Theming & Visual Identity
      3. Session Management & Navigation
      4. Rich Rendering
      Day 6Auth & Billing
      Available from May 13, 2026

      1. Authentication Flow
      2. Billing & Credits
      3. Error States & Edge Cases
      Day 7Distribution
      Available from May 14, 2026

      1. Decoupling & Bundling
      2. Build Scripts & Binary
      3. Documentation & Install Flow
      Day 8Building NightCode
      Available from April 19, 2026

      1. Intro
      2. Project Setup
      3. UI Infrastructure
      4. Routing & Screen Layout
      5. Server & Shared Database
      6. AI Chat Streaming
      7. Session Management
      8. Tool Calling
      9. Completing the User Experience