/**
 * Fill missing built-in preset models onto an already-configured vendor
 * group (e.g. DeepSeek pro/flash from an older install → add vision).
 * Reuses the existing sibling API key — operators do not re-paste it.
 */
export declare class SyncPresetError extends Error {
    readonly code: 'validation' | 'not_found' | 'config';
    constructor(code: 'validation' | 'not_found' | 'config', message: string);
}
export interface SyncPresetResult {
    preset: string;
    added: Array<{
        name: string;
        model: string;
    }>;
}
export declare function syncMissingPresetModels(presetKey: string): Promise<SyncPresetResult>;
/** Best-effort: for every installed built-in vendor that is missing catalog
 *  models and already has a key, add the gaps. Used by GET /api/llm so
 *  opening Settings fills DeepSeek vision after an upgrade. */
export declare function syncInstalledPresetGaps(): Promise<SyncPresetResult[]>;
//# sourceMappingURL=sync-preset.d.ts.map