import type { ConversationEvent, MessagingEventHandler, OfficeAddress } from "../types.js";
import type { Office } from "../office/types.js";
import type { ChatResponseErrorContext, ChatResponseErrorReporter, IncomingAttachment, RetryOptions, ResolveStopTargetInput, SavedAttachments, QueueAdmission } from "./types.js";
export declare function createChatResponseErrorReporter(resolve: () => Omit<ChatResponseErrorContext, "operation" | "extra">): ChatResponseErrorReporter;
export declare class MessagingIntakeTracker {
    private readonly name;
    private accepting;
    private active;
    constructor(name: string);
    run(work: () => Promise<void> | void): Promise<void>;
    close(): Promise<void>;
}
export declare const MAX_PENDING_EVENTS = 5;
export declare class MessagingEventQueue {
    private readonly name;
    private queue;
    private processing;
    private accepting;
    private drainWaiters;
    constructor(name?: string);
    enqueue(work: () => Promise<void>): boolean;
    admit(work: () => Promise<void>): QueueAdmission;
    size(): number;
    offerEvent(event: ConversationEvent, work: () => Promise<void>): boolean;
    close(): Promise<void>;
    private processNext;
}
export declare function withRetry<T>(fn: () => Promise<T>, opts: RetryOptions): Promise<T>;
export declare function splitText(text: string, limit: number, formatContinuation: (partNum: number) => string): string[];
export declare function saveIncomingAttachments(office: Office, items: readonly IncomingAttachment[]): Promise<SavedAttachments>;
export declare function resolveStopTarget(input: ResolveStopTargetInput): string | null;
export declare function resolveOnlyScopedStopTarget(handler: MessagingEventHandler, address: OfficeAddress): string | null;
export declare const MAX_ATTACHMENT_BYTES: number;
export declare class AttachmentRejectedError extends Error {
}
export declare function writeResponseToFile(response: Response, destPath: string, maxBytes?: number): Promise<void>;
export declare function downloadUrlToFile(url: string, destPath: string): Promise<void>;
export declare function shortNameToUnicodeEmoji(emoji: string): string;
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