/**
 * Migration tool: reads all data from one or more SQLite databases and writes
 * to PostgreSQL, including raw embedding vectors (no re-embedding required).
 *
 * Supports merging multiple SQLite DBs into a single Postgres instance
 * for multi-desktop consolidation.
 */
import type { PostgresBackendConfig } from "../config";
export interface MigrationOptions {
    /** One or more SQLite DB paths to migrate from. */
    sqlitePaths: string[];
    /** Postgres config (reads from code-session-memory config if not provided). */
    pgConfig?: PostgresBackendConfig;
    /** Label for this source machine (default: os.hostname()). */
    originHost?: string;
    /** Preview without writing. */
    dryRun?: boolean;
    /** Rows per INSERT batch (default 100). */
    batchSize?: number;
    /** Progress callback. */
    onProgress?: (event: MigrationProgress) => void;
}
export interface MigrationProgress {
    phase: "sessions" | "chunks" | "messages" | "tool_calls";
    sqlitePath: string;
    processed: number;
    total: number;
}
export interface MigrationReport {
    sqlitePaths: string[];
    sessions: number;
    chunks: number;
    messages: number;
    toolCalls: number;
    dryRun: boolean;
}
export declare function discoverSqliteDbPaths(): string[];
export declare function migrateSqliteToPg(options: MigrationOptions): Promise<MigrationReport>;
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