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Reasoning surfacing was split across three branches in runner.py plus two separate streaming buffers (loop hook and runner progress stream), with three independent display-side gates in the CLI. This collapsed the policy into one source of truth and fixed two real bugs: - Structured `reasoning_content` was suppressed whenever the answer was streamed, because the runner gated emission on `streamed_content`. Providers don't stream `reasoning_content`; it only arrives on the final response, so the answer stream and the reasoning channel are independent. Added `streamed_reasoning` to `AgentHookContext` to track the right bit. - `channels.showReasoning` was subordinated to `sendProgress`. They are orthogonal — turning off progress streaming shouldn't silence reasoning. Reworked the CLI gates accordingly. Single-helper consolidation: - `extract_reasoning(reasoning_content, thinking_blocks, content)` returns `(reasoning_text, cleaned_content)` with a defined fallback order: dedicated field → Anthropic thinking_blocks → inline `<think>`/`<thought>` tags. Models that expose none of these short-circuit to `(None, content)` — zero overhead. - `IncrementalThinkExtractor` replaces the ad-hoc `emit_incremental_think` function and its hand-rolled "emitted cursor" state in both the loop hook and the runner progress stream. Also documented the new `showReasoning` channel option in docs/configuration.md and noted its independence from sendProgress. Co-authored-by: Cursor <cursoragent@cursor.com>