import { type Owner, type OwnerState, type StateStore } from './types.js';
/** The directory must be outside tool access; permissions alone are not a sandbox. */
export declare class FileStateStore implements StateStore {
    #private;
    readonly owner: Owner;
    constructor(options: {
        owner: Owner;
        directory: string;
        policyVersion: string;
    });
    /** A crash releases this kernel lock; it never expires while a writer is alive. */
    withGovernanceLock<T>(action: () => Promise<T>, signal?: AbortSignal): Promise<T>;
    read(signal?: AbortSignal): Promise<OwnerState>;
    transact<T>(mutation: (state: OwnerState) => T, signal?: AbortSignal): Promise<T>;
}