/**
 * Near-duplicate detection with MinHash over word shingles.
 *
 * Two tool results are rarely byte-identical — a timestamp, a duration,
 * a line number moves — and still the same output. Three-word shingles
 * hashed 64 ways give a Jaccard estimate that is stable against those
 * edits and cheap enough to compare every message against every other
 * once per pass at the sizes a turn reaches. Hashing is FNV-1a with a
 * per-slot seed; nothing here needs to be cryptographic, only consistent
 * within a process.
 */
/** The signature of `tokens`; an empty signature for fewer than one shingle. */
export declare function minhash(tokens: readonly string[]): Uint32Array;
/** Estimated Jaccard similarity of two signatures, 0..1. */
export declare function similarity(a: Uint32Array, b: Uint32Array): number;
export declare function isEmptySignature(signature: Uint32Array): boolean;
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