import type { ReasonerMessage } from "./reasoner.js";
/**
 * Durable per-session reasoner conversation history. `save` persists the full
 * (already bounded) history snapshot — snapshot semantics, not append, because
 * barge-in truncation rewrites earlier messages to the heard prefix (G25).
 */
export interface ReasonerSessionStore {
    load(sessionId: string): Promise<readonly ReasonerMessage[]> | readonly ReasonerMessage[];
    save(sessionId: string, messages: readonly ReasonerMessage[]): Promise<void> | void;
    clear(sessionId: string): Promise<void> | void;
}
export declare class InMemoryReasonerSessionStore implements ReasonerSessionStore {
    private readonly sessions;
    load(sessionId: string): readonly ReasonerMessage[];
    save(sessionId: string, messages: readonly ReasonerMessage[]): void;
    clear(sessionId: string): void;
}
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