Weekly Dispatch #1 Feb 27 – Mar 06, 2026

Big Week 4 Update Plus Fresh npm Release

1 new feature · 1 deprecation

1
New Features
1
Deprecations
2
Lessons Updated
32
Sources Checked
Heads Up

Sonnet 4.5 is gone.

We're updating Week 4 materials after Sonnet 4.5 was completely removed from Claude's web and mobile apps. This change ensures you're learning with the most current and stable AI models available.

→ Affects Week 4
New

Claude Code npm 2.1.70 (latest)

The latest Claude Code npm package (version 2.1.70) is now available, and we're incorporating it into Week 1 to get you started with the most up-to-date tools from day one. This means you'll be working with the freshest features and improvements right out of the gate.

→ Affects Week 1

Always Check Your Package Version

Before starting any new Claude Code project, run npm list to verify you're using the latest version. Staying current with package updates ensures you have access to the newest features and bug fixes.

npm list @anthropic-ai/claude-code npm update @anthropic-ai/claude-code