/**
 * VercelSessionStore — persists Vercel conversation history for resume.
 *
 * The Vercel AI SDK is stateless: streamText/generateText don't persist
 * conversation history server-side (unlike Claude Agent SDK's session ID).
 * To support checkpoint/resume, we serialize the message array to disk and
 * reload it on the next run when a session ID is provided.
 *
 * Session IDs are role-scoped and stable: a new UUID is minted per role per
 * org (not per result), persisted in the filename, and reused across restarts
 * via the `resume` argument. This matches the AgentRunner contract where
 * session.ts carries `resumeSessionId` across maxTurns restarts and
 * checkpoint-ops.ts persists it to `runtime.json`.
 */
export interface VercelMessage {
    role: 'user' | 'assistant' | 'system' | 'tool';
    content: string;
}
export declare class VercelSessionStore {
    readonly sessionId: string;
    private readonly filePath;
    constructor(orgDir: string, roleId: string, sessionId?: string);
    load(): Promise<VercelMessage[]>;
    save(messages: VercelMessage[]): Promise<void>;
}
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