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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 v2.1.242

Uploaded git bundles are checked against your own object store

You'll notice
Useful2 Signal2
Cloud Sessions not in their notes

Uploaded git bundles are verified against your own checkout before being sent.

--batch
What

After building a bundle, Claude Code now confirms every commit it references really exists in this checkout, so a bundle assembled against some other object store is rejected rather than uploaded.

Details
  • Bundle heads are piped through cat-file --batch-check; a mismatch fails with reason git_dir_tampered.
  • Companion checks cover refs that were missing, ambiguous, or changed while the bundle was being built, each with its own remediation text.
  • Only on the hardened upload path; skipped when the legacy path is in use.
Evidence

at commits this checkout's own object store does not hold: another object store stood in while the bundle was made.

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 v2.1.242 →