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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 v2.1.247 26 Aug 2026

Cloud sessions refuse Artifact deletes before resolving the URL

You'll notice

Useful2 Signal2

Artifacts not in their notes

Deleting an artifact in a cloud session now refuses early and points you at your own machine.

/artifacts

What

A delete now checks whether it is running in a cloud session first, and if so denies with a message telling the model not to retry and pointing you at claude.ai or /artifacts on your own machine.

Details

The check is a runtime pair of helpers, not an environment variable or named flag, so what puts a session into that state is decided outside the CLI.

Evidence

This cloud session cannot delete Artifacts right now

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

See this entry in the whole of v2.1.247 →