import { DatabaseSync } from 'node:sqlite';
import type { ScanOpts } from '../../model/scan-opts.type.js';
/** @purpose Raw row shape from the OpenCode session table. */
export type SessionRow = {
    /** @purpose Unique session identifier */
    id: string;
    /** @purpose URL-friendly unique slug for the session */
    slug: string;
    /** @purpose Human-readable session title */
    title: string | null;
    /** @purpose Working directory the session was started in */
    directory: string;
    /** @purpose Session creation timestamp in epoch ms */
    time_created: number;
    /** @purpose Session last update timestamp in epoch ms */
    time_updated: number;
    /** @purpose Agent name used for the session */
    agent: string | null;
    /** @purpose Model name used for the session */
    model: string | null;
    /** @purpose Input token count for the session */
    tokens_input: number | null;
    /** @purpose Output token count for the session */
    tokens_output: number | null;
    /** @purpose Parent session ID for forked sessions */
    parent_id: string | null;
};
/**
 * @purpose Query active (non-archived) sessions from the OpenCode database.
 * @param db Open SQLite database connection.
 * @param [opts] Optional scan filtering parameters.
 * @returns Rows matching the active session criteria, ordered by most recently updated.
 */
export declare function querySessions(db: DatabaseSync, opts?: ScanOpts): SessionRow[];
/**
 * @purpose Retrieve the last message data for a session.
 * @param db Open SQLite database connection.
 * @param sessionId The session identifier to look up.
 * @returns The raw message data string, or null if no messages found.
 */
export declare function queryLastMessage(db: DatabaseSync, sessionId: string): string | null;