/**
 * OpenAIThinkingHandler — normalizes OpenAI's o1/o3 reasoning_summary
 * structured output into the framework's `ThinkingBlock[]` contract.
 *
 * OpenAI's reasoning_summary shape varies by model + API version:
 *
 *   1. Older o1 format — simple string:
 *        "I worked through the problem by first..."
 *
 *   2. Newer o3+ structured — array of summary items:
 *        [
 *          { type: 'summary_text', text: 'Identify the user request' },
 *          { type: 'summary_text', text: 'Choose appropriate tool' },
 *        ]
 *
 *   3. Missing entirely — most calls (gpt-4o, or o1/o3 without
 *      reasoning_summary param requested) → undefined raw input
 *
 * Handler dispatches on shape; output is `ThinkingBlock[]` with
 * `summary: true` per Phase 1 contract — distinguishes structured-
 * summary blocks from raw thinking content (Anthropic's shape).
 *
 * **No signature** — OpenAI doesn't sign reasoning. The output's
 * `signature` field stays undefined. No round-trip integrity invariant
 * (unlike Anthropic).
 *
 * **No `parseChunk`** — OpenAI doesn't stream reasoning content as of
 * early 2026. Reasoning arrives only on the terminal response. Per
 * Phase 1 design, `parseChunk` is optional; we omit entirely.
 *
 * **No `usage.thinking` computation** — reasoning_tokens lives on
 * `response.usage.completion_tokens_details.reasoning_tokens` and is
 * the OpenAIProvider's job to surface (deferred). Handler doesn't
 * compute token counts.
 */
import type { ThinkingHandler } from './types.js';
export declare const openAIThinkingHandler: ThinkingHandler;
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