import type { Embedder, PairwiseSimilarityResult, SimilarityItem } from './types.js';
export interface PairwiseSimilarityArgs {
    /** The texts to compare — e.g. `{ id: toolName, text: description }`. */
    readonly items: readonly SimilarityItem[];
    /**
     * Injected embedder. Wrap in an `EmbeddingCache` so catalog
     * descriptions embed once across lint runs (RFC-002 §3).
     */
    readonly embedder: Embedder;
    /** Abort signal threaded to the embedder (network backends). */
    readonly signal?: AbortSignal;
}
/**
 * Embed every item once (deduplicated batch) and compute the full
 * cosine matrix plus ranked upper-triangle pairs (descending; ties
 * keep input pair order).
 *
 * Invariants (pinned by property tests):
 *  - `matrix[i][j] === matrix[j][i]` — computed once, mirrored.
 *  - `matrix[i][i] === 1` EXACTLY — set by definition, so
 *    self-similarity is an invariant rather than a float artifact
 *    (and duplicate texts at different ids still compare via cosine).
 *  - N items → N·(N−1)/2 pairs.
 */
export declare function pairwiseSimilarity(args: PairwiseSimilarityArgs): Promise<PairwiseSimilarityResult>;