Feb 27 – Mar 06, 2026
1 new feature · 1 deprecation
Sonnet 4.5 has been completely removed from Claude's platform, which means we're updating Week 4's content to focus on newer model versions. While some users preferred 4.5 for creative tasks, this change ensures you're learning with the models that will be available long-term.
Claude Code npm package just dropped version 2.1.70, and we're integrating it into Week 1 to get you started with the latest features right from day one. This update means you'll be working with the most current tools and capabilities from the very beginning of your journey.
When working with rapidly updating packages like Claude Code, specify exact versions in your package.json to avoid surprise breaking changes. This keeps your development environment stable while you're learning.
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