/**
 * Serialize sql.js read-modify-write cycles per database path within this
 * process.  Callers that load a .db file, mutate it in WASM, then export+
 * rename must wrap the entire cycle in this lock so concurrent MCP tool
 * calls don't each load a stale copy (last writer wins = data loss).
 *
 * Only protects within a single Node process — cross-process races need
 * file locking, which is a separate concern.
 */
export declare function withDbLock<T>(dbPath: string, fn: () => Promise<T>): Promise<T>;
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