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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 v2.1.232 13 Aug 2026

Code blocks in HTML artifacts get syntax highlighting

You'll notice

Useful4 Signal2

Artifacts

Code blocks in generated HTML artifacts now get syntax highlighting, within a size budget.

What

Generated HTML artifacts now carry a small inline script that highlights <pre><code> blocks in the browser, subject to a total character budget and a per-block size cap so large artifacts stay responsive.

Details

Each block it handles is tagged with a marker attribute, so a block is never highlighted twice.

Evidence

data-claude-hljs-claimed

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

See this entry in the whole of v2.1.232 →