Source Intelligence

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 v1.0.122

Expanded Ultrathink Triggers

What changed: Ultrathink mode now recognizes natural language variations

Trigger phrases:

  • "ultrathink" (original)
  • "think ultra hard" (new)
  • "think ultrahard" (new)

Details:

  • More discoverable and intuitive for users
  • Backward compatible with original trigger
  • Evidence: DU1() at line 361856 (replaces dw1() at line 366346 in v1.0.120)

See this entry in the whole of v1.0.122 →