/**
 * Resolve per-provider HTTP defaults from {@link Config}.
 *
 * Lookup order for `request.timeoutMs` and `request.headers`:
 *   1. cfg.providers.<id>.request.{timeoutMs|headers}     (typed schema field — not yet present in Step 1)
 *   2. cfg.providers.<id>.{timeoutMs|headers}             (loose / future)
 *   3. fallbacks supplied by caller
 *
 * In Step 1 the Zod schema does not yet declare these fields. We still parse
 * defensively from `unknown` so this module is forward-compatible: when Step 4
 * adds the schema fields, no consumer changes are needed.
 */
import type { Config } from '../../config/schema.js';
export interface ResolvedProviderHttpDefaults {
    /** Default per-call timeout in ms (provider-level), or undefined. */
    timeoutMs?: number;
    /** Default headers merged into every request. Lower-case keys recommended. */
    headers: Record<string, string>;
}
export interface ResolveProviderHttpRequestConfigOptions {
    /** Provider id, e.g. "openai", "dashscope", "minimax". */
    providerId: string;
    /** Active xopc config (optional). */
    cfg?: Config;
    /** Built-in defaults (e.g. 60_000ms). Used only if config provides nothing. */
    fallbackTimeoutMs?: number;
    /** Built-in headers (e.g. User-Agent). Caller request headers still win. */
    fallbackHeaders?: Record<string, string>;
}
export declare function resolveProviderHttpRequestConfig(options: ResolveProviderHttpRequestConfigOptions): ResolvedProviderHttpDefaults;