export interface InboxEntry {
    id: string;
    ts: number;
    from: string;
    channel?: string;
    dm: boolean;
    text: string;
}
/** Bounded inbox (cap 100, omp IrcBus precedent) with optional durable sink. */
export declare class Inbox {
    private readonly cap;
    private readonly persist?;
    private entries;
    constructor(cap?: number, persist?: ((entry: InboxEntry) => void) | undefined);
    add(entry: InboxEntry): InboxEntry;
    /** Latest-first, optionally filtered to one channel. */
    list(limit?: number, channel?: string): InboxEntry[];
    get size(): number;
}