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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 v2.1.70

Session Metadata Files

What

Session transcripts now have companion .meta.json files that store additional metadata about each session.

Details
  • Metadata files are stored alongside session .jsonl transcripts
  • Written and read via dedicated helpers
  • Errors on inaccessible files are handled gracefully (ENOENT, EACCES, EPERM)
Evidence

Metadata file handler (search for ".meta.json")

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 v2.1.70 →