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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 v2.0.51

Trailing Thinking Block Filtering

Assistant messages ending with thinking blocks now have those blocks automatically filtered out before display.

  • Prevents display of incomplete or dangling thinking blocks
  • Logs telemetry about filtered blocks for debugging
  • Replaces content with "[No message content]" if all blocks were thinking
  • Evidence: Function GT3() at line 504394, helper oX9() at line 504391

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 v2.0.51 →