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CodeGym/Courses/Building with Claude Code

Building with Claude Code

This course teaches you how to use Claude Code, a tool that works with any tech stack and any task. Claude Code with custom CodeGym models is included. You will learn through a comic-style story, and every task mirrors a real workflow. You will learn to write technical specs, review the agent's changes, diagnose problems using evidence, and organise your work so you can always roll back changes. Supporting materials explain the fundamentals of software development and help you understand how everything works. Start with a simple prompt, build up to a disciplined “plan — edit — verify — submit” workflow, and become an AI-native developer.
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Detailed training program
  • Claude Code: an agent, not a chat
  • Claude Code in the IDE
  • Slash commands and session rollback
  • Skills: ready-made agent capabilities
  • Plugins: bundles of capabilities
  • Subagents: a second agent on the job
  • MCP: a bridge to live data
  • Hooks: event-driven automation
  • Autonomous agent: Playwright and /goal
  • CLAUDE.md: project context and memory
  • The cost of running an agent: /model, tokens, and /context
  • Plan mode and permissions
  • Change control: git and /diff
  • Prove you fixed it: logs, tests, and /model
  • Reviewing changes: /diff and scope
  • Context: /compact and plan mode
97+
Lessons
200+
Tasks
16
Tests
And also:
  • Access to Claude Code
  • AI code validator
  • IDE plugin
  • Claude Code customisation
  • Gamification

Course highlights

Claude Code included

No separate subscription, environment setup, or config wrangling required. Claude Code with custom CodeGym models is included and ready to use: we have already configured its response style and project memory, and added scenarios built around a comic-style story. Open level one and start using Claude Code straight away, not a simulation.

No experience required

The course starts from scratch. In level one, you will install the tool and give the agent its first instruction. Each level adds one new step, and supporting materials explain unfamiliar terms. If you already have experience, you will simply reach the advanced workflows sooner.

Discipline, not magic

We do not teach you to “write prettier prompts”, and we do not promise that AI will do everything for you. You will practise a clear workflow: plan — edit — verify — submit. You will learn to frame a task so the agent understands it correctly, review exactly what it changed, verify the outcome with evidence, and organise your work so you can roll back changes at any time. This skill will outlast any framework: it works with any tech stack and any task.

A skill you need today

This is not about learning to code “someday”. In 2026, AI-native developers are not the future — they are already here, and employers are looking for people who know how to work with agents. You can learn the basic Claude Code commands in a week. But this course teaches something more valuable: how to approach tasks differently by breaking them down, setting boundaries, and verifying the outcome. That is what separates someone who simply clicks buttons from someone a team wants to hire.

Not just about code

Claude Code is not just for websites and apps. It can automate any work built around repeatable steps. A designer can set up an image pipeline that turns a prompt into dozens of images in one click. A marketer can automate ad campaign creation. A tester can create checks that run on their own. An analyst can process batches of documents and generate a summary for a project. This course is not just for programmers: if your work involves repetitive tasks, you will learn how to automate them.