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.

All of v1.0.124 Home All releases olderv1.0.123 v1.0.125newer
Claude Code v1.0.124

Server-Controlled Extended Thinking (Experimental)

What: Server-side feature flag system that enables automatic extended thinking token allocation for specific users without requiring manual triggers.

Details:

  • New API endpoint /api/oauth/claude_cli/client_data fetches user-specific configuration
  • When alwaysThinking is enabled server-side, maximum thinking tokens are automatically allocated
  • Thinking blocks are intelligently hidden when auto-enabled unless user explicitly requested thinking
  • Does not affect manual thinking triggers or MAX_THINKING_TOKENS environment variable
  • Evidence: Client data API in TWA() at line 361888, token allocation in pT() at line 362093, hiding logic at line 415872

See this entry in the whole of v1.0.124 →