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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 event sending defaults to the v2 API

You'll notice

Useful3 Signal4

Cloud Sessions Notable

Cloud session events now go to the v2 API by default; session reads and writes still do not.

What

The built-in default for sending cloud session events flipped from off to on, so without a server value the CLI uses the v2 sessions API. The companion switch for v2 session create/read/update still defaults off, so only the event path moved. The live value still comes from remote config.

Evidence

isCcrV2SendEventsEnabled

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 →