interface TokenInfo {
    input: number;
    output: number;
    cache: {
        read: number;
        write: number;
    };
}
interface MessageInfo {
    id: string;
    role: string;
    sessionID: string;
    providerID?: string;
    modelID?: string;
    tokens?: TokenInfo;
    summary?: boolean;
    finish?: boolean;
}
export interface CompactionOptions {
    threshold?: number;
    getModelLimit?: (providerID: string, modelID: string) => number | undefined;
}
export interface CompactionContext {
    directory: string;
    client: {
        session: {
            summarize: (params: {
                path: {
                    id: string;
                };
                body: {
                    providerID: string;
                    modelID: string;
                };
                query: {
                    directory: string;
                };
            }) => Promise<unknown>;
            messages: (params: {
                path: {
                    id: string;
                };
                query: {
                    directory: string;
                };
            }) => Promise<{
                data?: Array<{
                    info: MessageInfo;
                }>;
            }>;
            promptAsync: (params: {
                path: {
                    id: string;
                };
                body: {
                    agent?: string;
                    parts: Array<{
                        type: string;
                        text: string;
                    }>;
                };
                query: {
                    directory: string;
                };
            }) => Promise<unknown>;
        };
        tui: {
            showToast: (params: {
                body: {
                    title: string;
                    message: string;
                    variant: string;
                    duration: number;
                };
            }) => Promise<unknown>;
        };
    };
}
export declare function createCompactionHook(ctx: CompactionContext, tags: {
    user: string;
    project: string;
}, options?: CompactionOptions): {
    event({ event }: {
        event: {
            type: string;
            properties?: unknown;
        };
    }): Promise<void>;
};
export {};
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