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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

Synced files are hash-checked before being accepted

You'll notice
Useful3 Signal3
Directory Sync

Synced files are now hash- and size-checked before being accepted.

What

Directory sync now verifies that fetched content matches the declared sha256 and length, and checks the declared hash shape and size bounds first. Content described in a transport format this side cannot read is refused and logged rather than attempted.

Evidence

dir-sync: refused a container object named by a carrier this side cannot read

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

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.248 →