import type { NormalizationCoverage, NormalizedEntry } from "./normalize.js";
/** Compact tuple: index, entry id, operation address, role, tool name, timestamp. */
export type DigestEntryAddress = [
    number,
    string | null,
    string | null,
    string | null,
    string | null,
    number | null
];
interface DigestIndexCoverage {
    complete: boolean;
    vocabularyBytes: number;
    reasons: string[];
}
export interface SessionDigest {
    sessionId: string;
    file: string;
    cwd: string;
    firstTs: number | null;
    lastTs: number | null;
    entryCount: number;
    filesTouched: string[];
    toolHistogram: Record<string, number>;
    errorCount: number;
    /** Sorted exact unique canonical terms. Terms never contain posting lists. */
    vocabulary: string[];
    /** Structural entry identities retained independently from lexical vocabulary. */
    addresses: DigestEntryAddress[];
    indexCoverage: DigestIndexCoverage;
}
export interface DigestInput {
    sessionId: string;
    file: string;
    cwd: string;
    entries: NormalizedEntry[];
    maxVocabularyBytes?: number;
    filesTouchedLimit?: number;
    normalizationCoverage?: NormalizationCoverage;
}
/** Purely fold normalized session entries into bounded lexical and structural metadata. */
export declare const foldSessionDigest: (input: DigestInput) => SessionDigest;
export {};
//# sourceMappingURL=digest.d.ts.map