/**
 * The only compatibility retained for a removed framework: reject its persisted
 * identifier with a stable migration diagnostic. It is deliberately not a
 * supported-framework registry or translation layer.
 */
export declare const LEGACY_GSTACK_ID = "gstack";
export declare const LEGACY_GSTACK_MIGRATION_DIAGNOSTIC = "unsupported legacy configuration \"gstack\"; migrate to a supported framework before continuing";
export declare function isLegacyGstackId(value: unknown): value is typeof LEGACY_GSTACK_ID;