CI / test (push) Successful in 9m12s
Claude Code and the Anthropic SDKs asking for extended thinking got the answer alone: a reasoning model's reasoning_content was dropped. Asked for, it comes back as a thinking block before the text — streamed as thinking_delta events and closed with a signature before the text begins — and the model is told to think through its chat template (enable_thinking); disabled tells it not to. Not asked for, it is left out as before. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>