/** Durable, private, crash-safe storage for resumable run metadata. */
import { type RunRecordV1 } from "../core/contracts.ts";
export declare class RunStoreError extends Error {
    readonly code: string;
    constructor(code: string, message: string);
}
export declare function defaultRunStoreRoot(env?: NodeJS.ProcessEnv): string;
export declare class RunStore {
    readonly root: string;
    constructor(root?: string);
    private runDirectory;
    private recordPath;
    initialize(): Promise<void>;
    create(record: RunRecordV1): Promise<void>;
    read(runId: string): Promise<RunRecordV1>;
    update(runId: string, update: (current: RunRecordV1) => RunRecordV1 | Promise<RunRecordV1>): Promise<RunRecordV1>;
    writeArtifact(runId: string, name: string, value: unknown): Promise<string>;
    readArtifact<T>(runId: string, name: string): Promise<T>;
    readArtifactOptional<T>(runId: string, name: string): Promise<T | undefined>;
    /** Serialize a state-changing run action across processes. */
    exclusive<T>(runId: string, action: () => Promise<T>): Promise<T>;
    private withLock;
}
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