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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 v2.1.248 27 Aug 2026

Live-edit artifacts gain a sync operation

Not switched on

Useful3 Signal4

Artifacts Notable

Live-edit artifacts gain a sync operation plus state tracking for live replicas.

The sync operation sits behind the existing live-edit gate.

What

Behind the existing live-edit gate, the artifact tool now offers a sync operation next to live-edit, its description gains a clause explaining sync, and session state tracks live replicas including which are unavailable or opening, plus transport, engine, render level and whether the head moved.

Details

Only present when the runtime live-edit gate is open; otherwise the operation list and description are unchanged.

Evidence

ACTION_DESCRIBE_SYNC_CLAUSE

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

See this entry in the whole of v2.1.248 →