/** Opaque timer handle returned by a runtime clock implementation. */
export type RuntimeTimer = unknown;
/** Runtime-owned clock seam for timeout-sensitive code and tests. */
export interface RuntimeClock {
    now(): number;
    setTimeout(callback: () => void, ms: number): RuntimeTimer;
    clearTimeout(timer: RuntimeTimer): void;
}
/** Runtime-owned HTTP client seam. */
export interface RuntimeHttpClient {
    fetch(url: string, init?: RequestInit): Promise<Response>;
}
/** Shared runtime services used by IO-heavy runtime components. */
export interface RuntimeServices {
    clock: RuntimeClock;
    http: RuntimeHttpClient;
}
/** Production clock backed by the JavaScript runtime. */
export declare const defaultRuntimeClock: RuntimeClock;
/** Production HTTP client backed by global `fetch`. */
export declare const defaultRuntimeHttpClient: RuntimeHttpClient;
/** Production runtime services. */
export declare const defaultRuntimeServices: RuntimeServices;
/** Resolve partial runtime service overrides against production defaults. */
export declare function resolveRuntimeServices(services?: Partial<RuntimeServices>): RuntimeServices;
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