import { Sigma } from './sigma.js';
import { Corpus } from './corpus.js';
export interface Sentinel {
    label: string;
    totalMass: number;
    uniqueMass: number;
    uniquenessRatio: number;
}
/**
 * Measure a project's PROTECTED function units live and return the `topN` by
 * surprisal mass — the natural signatures worth watching.
 * Matches rcf_core.sentinel.rank_sentinels in Python.
 */
export declare function rankSentinels(root: string, corpus: Corpus, sigma?: Sigma, options?: {
    topN?: number;
}): Sentinel[];
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