import type { JsonObject, ModelConfig, ProviderRequest, ProviderRequestOptions } from "@arnilo/prism";
/**
 * Resolve OpenRouter body `reasoning` from model defaults + per-turn override.
 * Request `options.compat.reasoning` wins key-by-key (Task 4 `openai_reasoning` family).
 * @see https://openrouter.ai/docs/guides/best-practices/reasoning-tokens
 */
export declare function resolveOpenRouterReasoning(model: ModelConfig, options: ProviderRequestOptions | undefined): JsonObject | undefined;
/**
 * Whether assistant thinking blocks should be replayed as OpenRouter `reasoning`
 * (or `reasoning_content` alias) instead of being folded into text content.
 * Official docs require preserving reasoning across tool-call turns.
 */
export declare function openRouterPreserveThinking(request: ProviderRequest): boolean;
/**
 * Strip OpenRouter-owned compat keys before opaque body spread so resolved
 * `reasoning` / routing / cache flags cannot be overwritten by raw passthrough.
 */
export declare function stripOpenRouterOwnedCompat(compat: JsonObject | undefined): JsonObject | undefined;