import type { LLMMessage } from '../llm/llm-provider.js';
export interface SessionMeta {
    sessionKey: string;
    createdAt: number;
    updatedAt: number;
    title?: string;
    messageCount: number;
}
export interface SessionStore {
    loadMessages(sessionKey: string): Promise<LLMMessage[]>;
    appendMessage(sessionKey: string, message: LLMMessage): Promise<void>;
    replaceMessages(sessionKey: string, messages: LLMMessage[]): Promise<void>;
    listSessions(): Promise<SessionMeta[]>;
    deleteSession(sessionKey: string): Promise<void>;
    exists(sessionKey: string): Promise<boolean>;
}
export declare class InMemorySessionStore implements SessionStore {
    private sessions;
    loadMessages(sessionKey: string): Promise<LLMMessage[]>;
    appendMessage(sessionKey: string, message: LLMMessage): Promise<void>;
    replaceMessages(sessionKey: string, messages: LLMMessage[]): Promise<void>;
    listSessions(): Promise<SessionMeta[]>;
    deleteSession(sessionKey: string): Promise<void>;
    exists(sessionKey: string): Promise<boolean>;
}
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