interface Message {
    sender: 'ai' | 'user';
    content: string;
    at: string;
}
type ThreadStatus = 'active' | 'resolved' | 'waiting' | 'needs-reply' | 'review';
interface Thread {
    id: string;
    title: string;
    status: ThreadStatus;
    messages: Message[];
    createdAt: string;
    updatedAt: string;
}
type ThreadFilter = ThreadStatus | 'inbox';
interface ThreadFilters {
    status?: ThreadFilter;
}
interface ListOptions {
    status?: ThreadFilter;
    json?: boolean;
    dir?: string;
}
interface CommandOptions {
    json?: boolean;
    dir?: string;
    from?: 'ai' | 'user';
    status?: ThreadStatus;
    dryRun?: boolean;
}

declare function readThreads(dir: string): Promise<Thread[]>;
declare function writeThreads(dir: string, threads: Thread[]): Promise<void>;
declare function mutateThreads<T>(dir: string, updater: (threads: Thread[]) => Promise<T> | T): Promise<T>;

declare function createThread(dir: string, title: string): Promise<Thread>;
declare function listThreads(dir: string, filters?: ThreadFilters): Promise<Thread[]>;
declare function getThread(dir: string, id: string): Promise<Thread | null>;
declare function addMessage(dir: string, id: string, content: string, sender?: 'ai' | 'user', status?: ThreadStatus): Promise<Thread>;
declare function resolveThread(dir: string, id: string): Promise<Thread>;
declare function reopenThread(dir: string, id: string): Promise<Thread>;
declare function purgeThreads(dir: string, dryRun?: boolean): Promise<Thread[]>;

declare function formatAge(date: Date, now?: Date): string;
declare function formatThreadList(threads: Thread[], now?: Date): string;
declare function formatThread(thread: Thread): string;

export { type CommandOptions, type ListOptions, type Message, type Thread, type ThreadFilter, type ThreadFilters, type ThreadStatus, addMessage, createThread, formatAge, formatThread, formatThreadList, getThread, listThreads, mutateThreads, purgeThreads, readThreads, reopenThread, resolveThread, writeThreads };