/**
 * Curation Service Interface.
 *
 * Defines the contract for curating memory facts — marking them as
 * authoritative, draft, deprecated, or needing review. Also provides
 * quality scoring to rank facts by reliability.
 *
 * Part of Phase 5C: Curation & Compaction.
 */
import type { IMemoryItem } from './types';
/**
 * Curation mark for a memory fact.
 */
export type CurationMark = 'authoritative' | 'draft' | 'deprecated' | 'needs-review';
/**
 * All valid curation marks.
 */
export declare const CURATION_MARK_VALUES: readonly CurationMark[];
/**
 * Check if a string is a valid CurationMark.
 *
 * @param value - The string to check
 * @returns true if valid curation mark
 */
export declare function isValidCurationMark(value: string): value is CurationMark;
/**
 * Resolve a curation mark to its corresponding tag string.
 *
 * @param mark - The curation mark
 * @returns Tag string, e.g. 'curated:authoritative'
 */
export declare function resolveCurationTag(mark: CurationMark): string;
/**
 * Parse the curation mark from a tag array.
 * Looks for tags matching 'curated:<mark>'.
 *
 * @param tags - Array of tags to search
 * @returns The curation mark found, or null if none present
 */
export declare function parseCurationTag(tags: readonly string[]): CurationMark | null;
/**
 * Curation service interface.
 *
 * Provides operations for curating facts (marking quality)
 * and computing quality scores for ranking.
 *
 * Note: Group IDs are no longer used - the git repo provides scoping via git-mem.
 */
export interface ICurationService {
    /**
     * Mark a fact with a curation status.
     *
     * Side effects by mark:
     * - `deprecated`: Also expires the fact
     * - `authoritative`: Promotes confidence to `verified`
     *
     * @param uuid - UUID of the fact to mark
     * @param mark - The curation mark to apply
     */
    markFact(uuid: string, mark: CurationMark): Promise<void>;
    /**
     * Compute a quality score for a memory item.
     *
     * Formula: confidenceScore × sourceWeight × recencyBonus
     * - confidenceScore: from CONFIDENCE_SCORES (0.1–1.0)
     * - sourceWeight: varies by source type (0.3–1.0)
     * - recencyBonus: 1.0 for <7 days, decays linearly to 0.5 at 90 days
     *
     * @param item - The memory item to score
     * @returns Quality score between 0.0 and 1.0
     */
    computeQualityScore(item: IMemoryItem): number;
    /**
     * Sort memory items by quality score descending.
     * Returns a new sorted array (immutable).
     *
     * @param items - Items to rank
     * @returns New array sorted by quality score descending
     */
    rankByQuality(items: readonly IMemoryItem[]): readonly IMemoryItem[];
}
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