import type { NoteMetadata } from '../storage/NoteRepository.js';
export declare const DUPLICATE_SIMHASH_THRESHOLD = 3;
export declare const DUPLICATE_EVIDENCE_LIMIT = 10;
export interface DuplicateSnapshotNote {
    readonly note: NoteMetadata;
    readonly hash: string;
    readonly hashSource: 'stored' | 'ephemeral';
}
export interface SimHashGroup {
    readonly seedId: string;
    readonly notes: readonly NoteMetadata[];
    readonly evidence: readonly {
        noteId: string;
        distanceFromSeed: number;
    }[];
}
export interface DuplicateIncompletenessEvidence {
    readonly omissionReasons: Readonly<Record<string, number>>;
    /** Inventory conditions that make completeness unknowable without identifying an omitted candidate. */
    readonly uncertaintyReasons?: Readonly<Record<string, number>>;
    /** Indexed rows may no longer represent their canonical Markdown. */
    readonly indexedSnapshotUnsafe?: boolean;
}
export interface DuplicateEvaluation {
    readonly coverage: {
        readonly eligible: number;
        readonly hashedAtStart: number;
        readonly computedEphemerally: number;
        readonly evaluated: number;
        readonly omitted: number;
        readonly omissionReasons: Readonly<Record<string, number>>;
        readonly uncertaintyReasons: Readonly<Record<string, number>>;
        readonly complete: boolean;
    };
    readonly titleGroups: readonly {
        normalizedTitle: string;
        notes: readonly NoteMetadata[];
    }[];
    /** Complete count of qualifying pairs; simhashGroups retains bounded advisory evidence. */
    readonly simhashGroupTotal: number;
    readonly simhashGroups: readonly SimHashGroup[];
    readonly threshold: number;
}
/**
 * Canonical comparison key for duplicate-title grouping, shared with the
 * repository's title-collision detection. Applies kind-prefix and `.md`
 * stripping and lowercasing to the full title, and collapses runs of
 * non-alphanumeric characters to a single space instead of
 * deleting them, so distinct word sequences (`note book` vs `notebook`) stay
 * distinct keys. Returns `''` for a title with no alphanumeric content;
 * callers skip empty keys rather than grouping unrelated notes together.
 */
export declare function normalizeComparableTitle(title: string): string;
export declare function evaluateDuplicates(input: readonly (NoteMetadata & {
    content_hash?: string | null;
})[], threshold?: number, incompleteness?: DuplicateIncompletenessEvidence): DuplicateEvaluation;
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