export type DiscoveryAnchorCategory = 'path' | 'opaque-id' | 'versioned-subject';
export interface DiscoveryAnchor {
    readonly category: DiscoveryAnchorCategory;
    /** Normalized value used for matching. */
    readonly value: string;
}
export interface CandidateItem {
    readonly id: string;
    readonly content: string;
}
export interface SupersessionCandidate {
    /** Sorted ids of the active discoveries sharing these anchors. */
    readonly itemIds: readonly string[];
    /** Sorted anchors this group shares. */
    readonly anchors: readonly DiscoveryAnchor[];
}
export declare function collectDiscoveryAnchors(content: string, categories: readonly DiscoveryAnchorCategory[]): readonly DiscoveryAnchor[];
export declare function findSupersessionCandidates(items: readonly CandidateItem[], categories: readonly DiscoveryAnchorCategory[]): readonly SupersessionCandidate[];
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