Follow Discord

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.

← All of v2.1.251 Home All releases ←olderv2.1.250

Claude Code v2.1.251 28 Aug 2026

Claude only replies to comment threads you explicitly send to it

You'll notice

Useful4 Signal4

Artifacts not in their notes

Claude only answers artifact comment threads you hand over with Send to Claude or @claude.

@claude

What

Claude no longer treats a thread as fair game once anyone opens it in the artifact view. A writer has to hand the thread over, either by replying on it with "Send to Claude" or by mentioning @claude in it. Resolving a thread now also tells you which threads were not sent to Claude and how to send one.

Details

Applies wherever the artifact tool's comment support is available.

Evidence

Replies land only on threads a writer has activated for Claude (by replying on the thread with Send to Claude or mentioning @claude in it)

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

See this entry in the whole of v2.1.251 →