/**
 * The live-chat message channel (#714): the user's own turns into a running agent.
 *
 * An agent's await gates (#337) are the agent asking the user; this is the reverse —
 * the user speaking to the agent unprompted. Each message continues the *same*
 * agent session (`claude --resume <id>`), so the conversation keeps its full
 * context. The run loop drains this once the work settles; a daemon-spawned
 * session then ends itself when the queue is idle (#1390) — a follow-up message
 * reopens the conversation via `--resume`, like Claude Code web — while an agent
 * with its own terminal dashboard keeps the old stay-open wait, since that
 * surface has no daemon to resume through.
 *
 * Wired only when an interactive channel can deliver messages (a live dashboard /
 * daemon over `control.jsonl`). A headless agent gets no {@link AgentMessages}, so its
 * loop ends when the agent stops asking — byte-identical to before this existed.
 */
/**
 * One user chat message, plus the surface it arrived through (#917).
 */
export interface ChatMessage {
    text: string;
}
/** A source of user chat messages for a running agent. */
export interface AgentMessages {
    /**
     * The next user message. Returns an already-queued message immediately (drain
     * between turns); otherwise waits for one (stay-open). Resolves `undefined` when
     * the agent should stop waiting — the signal aborted (Stop / budget cap) or the
     * source was closed — so the loop ends cleanly rather than hanging.
     */
    next(signal?: AbortSignal): Promise<ChatMessage | undefined>;
    /**
     * The next user message only if one has already arrived — never waits (#1390). What the
     * end-of-run drain asks: a queued follow-up is processed, an idle queue ends the session.
     * `undefined` once closed, so an aborted agent never starts a new turn off a stale message.
     */
    takeQueued(): ChatMessage | undefined;
}
/**
 * A {@link AgentMessages} the control channel feeds ({@link push}) and the run loop
 * drains ({@link next}). A message that arrives with a waiter parked hands off
 * directly; otherwise it queues until the next `next()`. FIFO in both directions.
 */
export declare class AgentMessageQueue implements AgentMessages {
    private readonly pending;
    private readonly waiters;
    private closed;
    /** Enqueue a user message (or hand it to a parked waiter). No-op once closed. */
    push(text: string): void;
    /** Stop the chat: wake every parked waiter with `undefined` so their loops end. */
    close(): void;
    takeQueued(): ChatMessage | undefined;
    next(signal?: AbortSignal): Promise<ChatMessage | undefined>;
}
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