/**
 * Working Memory Store
 *
 * A key-value store for facts, decisions, and context that persists
 * across conversation boundaries. Enables Claude to "remember" things
 * explicitly and retrieve them later.
 */
import type { Database } from "better-sqlite3";
import type { WorkingMemoryItem, RememberOptions, RecallOptions, SemanticRecallOptions, SemanticRecallResult } from "./types.js";
export declare class WorkingMemoryStore {
    private db;
    constructor(db: Database);
    /**
     * Store a fact/decision/context in working memory
     */
    remember(options: RememberOptions): WorkingMemoryItem;
    /**
     * Recall a specific item by key
     */
    recall(key: string, projectPath: string): WorkingMemoryItem | null;
    /**
     * Recall items matching options
     */
    recallMany(options: RecallOptions): WorkingMemoryItem[];
    /**
     * Semantic search across working memory using FTS
     */
    recallRelevant(options: SemanticRecallOptions): SemanticRecallResult[];
    /**
     * Forget (delete) a memory item by key
     */
    forget(key: string, projectPath: string): boolean;
    /**
     * Forget all items for a project
     */
    forgetAll(projectPath: string): number;
    /**
     * List all memory items for a project
     */
    list(projectPath: string, options?: {
        tags?: string[];
        limit?: number;
        offset?: number;
    }): WorkingMemoryItem[];
    /**
     * Get count of items for a project
     */
    count(projectPath: string): number;
    /**
     * Get a single item by ID
     */
    private getById;
    /**
     * Convert database row to WorkingMemoryItem
     */
    private rowToItem;
    /**
     * Clean up expired items
     */
    private cleanupExpired;
    /**
     * Insert into FTS index
     */
    private insertFts;
    /**
     * Update FTS index
     */
    private updateFts;
    /**
     * Delete from FTS index
     */
    private deleteFts;
    /**
     * Escape FTS query for safe matching
     */
    private escapeFtsQuery;
    /**
     * Normalize BM25 rank to a similarity score (0-1)
     * BM25 returns negative scores, lower is better
     */
    private normalizeRank;
}
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