/**
 * Optional local-edit guard for the "always-local" write engines
 * (`BulkQueryEngine`, `CsvConnector`).
 *
 * These two classes are constructed directly by viewer components
 * (`BulkPropertyEditor.tsx`, `DataConnector.tsx`) and write straight to a
 * `MutablePropertyView`, bypassing the Zustand store's `setProperty` /
 * `setEntityType` actions — and, with them, `canCollabEdit()`. Unlike
 * `MutablePropertyView` and `StoreEditor` themselves (see the module doc on
 * `MutablePropertyView`), neither engine is ever reached by inbound CRDT
 * replay, `useZoneWriteBack`, or any `mirror*` helper: both are always
 * constructed fresh, per dialog-open, from a local user action, and never
 * shared with — or passed into — the collab plumbing. That makes them safe
 * to gate at construction: there is no legitimate caller this guard could
 * wrongly block.
 *
 * A caller passes a `canEdit` predicate at construction; the engine consults
 * it once before mutating and throws `MutationGuardError` (rather than
 * silently dropping the write) if it returns false. Passing no predicate
 * preserves today's behaviour exactly — this is opt-in, not a new default,
 * so it does not change any other consumer of these classes (CLI, SDK,
 * sandbox bridge, existing tests).
 */
/** Thrown by a guarded engine when `canEdit()` returns false. */
export declare class MutationGuardError extends Error {
    constructor(message?: string);
}
/** Predicate consulted before a guarded engine applies a write. */
export type MutationGuard = () => boolean;
/** Throws `MutationGuardError` if `guard` is present and returns false. */
export declare function checkMutationGuard(guard: MutationGuard | undefined | null): void;
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