import type { RuntimeEvent, RuntimeSessionId, RuntimeStatus, TranscriptChunk } from "./types.js";
export declare function defaultStorageDir(): string;
export declare function sessionDir(storageDir: string, sessionId: RuntimeSessionId): string;
export declare function statePath(storageDir: string, sessionId: RuntimeSessionId): string;
export declare function eventsPath(storageDir: string, sessionId: RuntimeSessionId): string;
export declare function transcriptPath(storageDir: string, sessionId: RuntimeSessionId): string;
export declare function ensureSessionLayout(storageDir: string, sessionId: RuntimeSessionId): Promise<void>;
export declare function writeState(storageDir: string, status: RuntimeStatus): Promise<void>;
export declare function readState(storageDir: string, sessionId: RuntimeSessionId): Promise<RuntimeStatus | undefined>;
export declare function appendJsonLine(path: string, value: unknown): Promise<void>;
export declare function appendEvent(storageDir: string, event: RuntimeEvent): Promise<void>;
export declare function readJsonLines<T>(path: string): Promise<T[]>;
export declare function readEvents(storageDir: string, sessionId: RuntimeSessionId, cursor?: number): Promise<TranscriptChunk>;
export declare function readTranscript(storageDir: string, sessionId: RuntimeSessionId, cursor?: number): Promise<TranscriptChunk>;
export declare function tailTranscript(storageDir: string, sessionId: RuntimeSessionId, limit?: number): Promise<RuntimeEvent[]>;
export declare function listStates(storageDir: string): Promise<RuntimeStatus[]>;