import type { IToolLoopContextStrategy, Message, SerializableStrategyState, ToolLoopContextBase, ToolRound } from '@mcp-abap-adt/llm-agent';
export interface WindowContextStrategyOptions {
    keepLastRounds?: number;
}
/** RAG-less bounded window: last K rounds raw + one marker for the rest. */
export declare class WindowContextStrategy implements IToolLoopContextStrategy {
    private rounds;
    private readonly keep;
    constructor(opts?: WindowContextStrategyOptions);
    record(round: ToolRound): Promise<void>;
    form(base: ToolLoopContextBase): Promise<Message[]>;
    snapshot(): SerializableStrategyState;
    restore(state: SerializableStrategyState): void;
}
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