import type { OAuthAuthDetails } from "./types";
/**
 * Returns a cached auth snapshot when available, favoring unexpired tokens.
 */
export declare function resolveCachedAuth(auth: OAuthAuthDetails): OAuthAuthDetails;
/**
 * Stores the latest auth snapshot keyed by refresh token.
 */
export declare function storeCachedAuth(auth: OAuthAuthDetails): void;
/**
 * Clears cached auth globally or for a specific refresh token.
 */
export declare function clearCachedAuth(refresh?: string): void;
/**
 * Caches a thinking signature for a given session and text.
 * Used for Claude models that require signed thinking blocks in multi-turn conversations.
 */
export declare function cacheSignature(sessionId: string, text: string, signature: string): void;
/**
 * Retrieves a cached signature for a given session and text.
 * Returns undefined if not found or expired.
 */
export declare function getCachedSignature(sessionId: string, text: string): string | undefined;
/**
 * Clears signature cache for a specific session or all sessions.
 */
export declare function clearSignatureCache(sessionId?: string): void;
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