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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.

All of v2.0.20 Home All releases olderv2.0.19 v2.0.21newer
Claude Code v2.0.20

Terminal Output Performance

What: Optimized terminal rendering with synchronized updates

Details:

  • Reduced function complexity in d50() at line 71278 (previously U50())
  • Removed separate stderr handling for improved performance
  • Simplified output buffering logic
  • All output now uses synchronized update sequences

See this entry in the whole of v2.0.20 →