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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.21 28 Jan 2026

Personalized Welcome Message

What

The startup welcome message now shows which IDE or terminal you're using.

Details

Format changed from "Welcome to Claude Code" to "Welcome to Claude Code for <IDE name>"
Shows editor name like "VS Code", "Cursor", "Zed", or terminal name
Detected from IDE integration context or $TERM environment variable
Makes multi-IDE workflows clearer

Evidence

Line 306414 (welcome message rendering, "Welcome to Claude Code for ", $ where $ is IDE name from J0())

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.21 →