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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 v2.1.227

Output-style guidance rewritten without em dashes

You'll notice
Useful2 Signal1
Elsewhere

Claude's response-style guidance was reworded to drop em dashes.

What

The response-style prose replaces its em-dash asides with colons and commas. The code-comment rule now ends "it's noise the moment the change merges" instead of referring to a PR.

Evidence

it's noise the moment the change merges

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

See this entry in the whole of v2.1.227 →