import type { Fact, NewFact, SearchOpts, MemorySearchResult, SessionRecord, NewSession, Procedure, SessionOutcome } from './types.js';
export declare const HOT_SOFT_WARN_RATIO = 0.8;
export declare function estimateTokens(text: string): number;
export interface HotUsage {
    chars: number;
    tokens: number;
    maxTokens: number;
    pct: number;
    truncated: boolean;
}
export declare class MemoryStore {
    private readonly dir;
    private readonly db;
    constructor(memoryDir?: string);
    private enableWalMode;
    loadHot(): string | null;
    saveHot(content: string): HotUsage;
    hotUsage(): HotUsage;
    private computeHotUsage;
    storeFact(fact: NewFact): number;
    supersedeFact(factId: number, newContent: string, category?: string, evidence?: string | null): number;
    removeFact(factId: number): boolean;
    getFact(factId: number): Fact | null;
    searchFacts(query: string, opts?: SearchOpts): Fact[];
    startSession(session: NewSession): void;
    endSession(sessionId: string, summary: string, outcome: SessionOutcome, tokenCount?: number, costUsd?: number): void;
    getSession(sessionId: string): SessionRecord | null;
    recentSessions(limit?: number): SessionRecord[];
    writeProcedure(name: string, content: string, sessionId?: string): void;
    loadProcedure(name: string): Procedure | null;
    searchProcedures(query: string): Procedure[];
    search(query: string, opts?: SearchOpts): MemorySearchResult[];
    replayWAL(): number;
    close(): void;
    private appendWAL;
}