import type { AssistantMessage } from "../types";
import type { TransportFailureFacts } from "./fallback-transport";
export declare function classifyContextOverflow(message: AssistantMessage, transportFailure?: TransportFailureFacts, contextWindow?: number): boolean;
/**
 * Check if an assistant message represents a context overflow error.
 *
 * Callers with normalized transport facts should use {@link classifyContextOverflow}
 * so typed provider codes take precedence over error prose.
 */
export declare function isContextOverflow(message: AssistantMessage, contextWindow?: number): boolean;
/**
 * Get the overflow patterns for testing purposes.
 */
export declare function getOverflowPatterns(): RegExp[];