export interface SyncExtensionsFlowOptions {
    /** From --config <path>. When set, dirname(resolve(configPath)) is project root. */
    configPath?: string;
}
/**
 * Drives the `--sync-extensions` flag: load sidecar + resolved official config,
 * stub any `$id`s missing from `ext.extensions.<resource>`, warn about orphans,
 * and write the sidecar back if anything was added.
 */
export declare function runSyncExtensionsFlow(opts: SyncExtensionsFlowOptions): Promise<void>;