import type { EntityHandle, World } from '@forgeax/engine-ecs';
/**
 * Scene-owned malformed-edge fixture. Production relationship writes reject
 * stale targets and cycles before touching either side of the relationship.
 * This test-only fixture deliberately corrupts the source column through the
 * existing package-internal graph seam so projection can exercise its
 * fail-closed diagnostics without weakening the public write contract.
 */
export declare function setMalformedParentEdge(world: World, child: EntityHandle, parent: EntityHandle): void;
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