Projects
Choose something to build. Follow the lessons, edit your code, and see it run. Download your own files when you are ready.
6 free projects · JavaScript, language models and agents · The two AI projects open without a login
Work with an API
Weather Reporter
Look up a ZIP code, display weather and handle failed requests.
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Practice version control
Git Basics
Practice staging, commits, branches and safe recovery.
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Build a small language model
Make your own LLM
Train real neural weights in your browser, measure held-out loss and keep your model.
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Prepare an assistant-ready repository
Agentic guardrails
Repair a real task reader, test its boundaries and export a repository prepared for Claude Code.
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