/**
 * Local-to-Supabase Migration
 *
 * Migrates existing free-tier local .gitmem/ data to Supabase when
 * a user upgrades to Pro. Called during `activate` after schema is
 * verified and credentials are saved.
 *
 * Collections migrated:
 *   - learnings (scars, wins, patterns, anti-patterns)
 *   - sessions
 *   - decisions
 *   - scar_usage
 *
 * Threads are NOT migrated — they remain local (thread lifecycle is
 * tied to .gitmem/threads.json and managed by session_start).
 *
 * Migration is idempotent: uses Supabase upsert (merge-duplicates)
 * so re-running is safe. Existing Supabase records with same ID are
 * updated, not duplicated.
 */
export interface MigrationResult {
    migrated: Record<string, number>;
    skipped: Record<string, number>;
    errors: Record<string, string[]>;
    total: number;
    hasLocalData: boolean;
}
/**
 * Check if there is local data worth migrating
 */
export declare function hasLocalData(gitmemDir?: string): boolean;
/**
 * Migrate local .gitmem data to Supabase
 *
 * @param supabaseUrl - User's Supabase project URL
 * @param supabaseKey - User's service role key
 * @param tablePrefix - Table prefix (default: "gitmem_")
 * @param gitmemDir   - Override .gitmem directory path
 * @param onProgress  - Callback for progress reporting
 */
export declare function migrateLocalToSupabase(opts: {
    supabaseUrl: string;
    supabaseKey: string;
    tablePrefix?: string;
    gitmemDir?: string;
    onProgress?: (msg: string) => void;
}): Promise<MigrationResult>;
/**
 * Check if there are .pre-migration backup files that can be re-imported.
 * This handles the case where a previous migration partially failed —
 * the user runs `activate` again and we pick up from the backups.
 */
export declare function hasPreMigrationData(gitmemDir?: string): boolean;
/**
 * Re-import from .pre-migration backup files.
 * Same as migrateLocalToSupabase but reads from *.json.pre-migration files.
 * Idempotent: uses upsert (merge-duplicates) so re-running is safe.
 */
export declare function reimportFromBackups(opts: {
    supabaseUrl: string;
    supabaseKey: string;
    tablePrefix?: string;
    gitmemDir?: string;
    onProgress?: (msg: string) => void;
}): Promise<MigrationResult>;
/**
 * Rename local collection files after successful migration
 * Adds .pre-migration suffix so data isn't lost but won't be re-read by free tier
 */
export declare function archiveLocalData(gitmemDir?: string): string[];
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