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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 v2.1.97

Duplicate Key Detection in Virtual Message List

A new diagnostic warning detects duplicate sibling keys in the virtual message list renderer, which could previously cause DOM node leaks via mapRemainingChildren overwrite.

Evidence

Warning message "VirtualMessageList: duplicate sibling keys" (search for "VirtualMessageList: duplicate sibling keys")

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

See this entry in the whole of v2.1.97 →