import type { ImprovementEvent, ImprovementStore, StudioOutcomeAuthority } from './types.js';
export type ImprovementStoreProcessStatus = 'alive' | 'absent' | 'ambiguous';
export interface FileImprovementStoreOptions {
    readonly processStatus?: (pid: number) => ImprovementStoreProcessStatus;
    readonly now?: () => string;
}
/** Append-only local audit adapter. Pass the installation's trusted durable state root. */
export declare class FileImprovementStore implements ImprovementStore {
    #private;
    constructor(durableRoot: string, inputAuthority: StudioOutcomeAuthority, options?: FileImprovementStoreOptions);
    append(event: ImprovementEvent): 'stored' | 'replay';
    appendBatch(events: readonly ImprovementEvent[]): readonly ('stored' | 'replay')[];
    events(): readonly ImprovementEvent[];
}