import type { BlobRef } from "./types.js";
/**
 * Type guard verifying that an unknown value is a BlobRef.
 *
 * Checks structural shape rather than relying on `__kind` alone, so
 * user data that happens to contain `{ __kind: "blob" }` does not
 * incorrectly route through the blob resolver.
 */
export declare function isBlobRef(value: unknown): value is BlobRef;
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