/**
 * Vectors as bytes, for the caches that keep them outside the process. Kept apart from the caches so
 * a database adapter carries only this.
 */
/**
 * A vector as packed little-endian float32: four bytes a dimension, against about twenty as JSON.
 * Providers return float32 precision, so nothing they sent is lost.
 */
export declare function packVector(vector: readonly number[]): Uint8Array;
/** A vector from the bytes `packVector()` wrote. */
export declare function unpackVector(bytes: Uint8Array): number[];