import type { DatabaseSync } from 'node:sqlite';
export declare const FTS_CHURN_KEY = "fts_churn_since_maintain";
export declare function optimizeStore(db: DatabaseSync): void;
export declare function recordFtsChurn(ftsAvailable: boolean, getMetadata: (key: string) => string | undefined, setMetadata: (key: string, value: string) => void, rows: number): void;
export declare function optimizeFtsIfNeeded(stmt: (sql: string) => ReturnType<DatabaseSync['prepare']>, ftsAvailable: boolean, getMetadata: (key: string) => string | undefined, setMetadata: (key: string, value: string) => void, runWithRetry: <T>(fn: () => T) => T, options?: {
    minChurnRatio?: number;
    minChurnRows?: number;
}): boolean;
export declare function checkpointWal(db: DatabaseSync): boolean;
export declare function compactIfNeeded(db: DatabaseSync, stmt: (sql: string) => ReturnType<DatabaseSync['prepare']>, runWithRetry: <T>(fn: () => T) => T, options?: {
    minBytes?: number;
    minFreeRatio?: number;
}): boolean;
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