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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 v2.0.8

Session Persistence Deduplication Simplified

What: Removed client-side duplicate checking before persisting session entries, relying entirely on server-side validation.

Technical details: In v2.0.5, the persist function (K8B() at line 397234) checked a local Map (Dv1) to skip API calls for session entries that had already been sent. In v2.0.8, this optimization was removed from the persist function (KPB() at line 436398), and all entries are now sent to the server.

Implications:

  • Slightly more API calls in scenarios involving duplicate persist attempts
  • Server remains authoritative for deduplication via Last-Uuid header validation
  • Simpler client logic with fewer edge cases

Evidence: Duplicate checking logic at lines 397235-397240 in v2.0.5 is absent from the v2.0.8 persist function

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 v2.0.8 →