import { WebClient } from '@slack/web-api';
/** Runtime-only Slack operations. Control commands never construct a second client. */
export declare function configureSlackClient(next: WebClient, configuredChannelId: string): void;
export declare function clearSlackClient(): void;
/** Reconciles only gateway-owned reactions; Slack removes only the caller's own reaction. */
export declare function reconcileInboxReactions(limit?: number): Promise<void>;
/** Coalesces post-transition reconciliation without blocking a control response. */
export declare function scheduleReactionReconciliation(): void;
type SlackPage = {
    items: unknown[];
    nextCursor: string | null;
};
/** Leaves framing/error-envelope headroom beneath the 1 MiB control limit. */
export declare const SLACK_RESPONSE_BUDGET_BYTES: number;
export type SlackUser = {
    id: string;
    label: string;
};
/** Validates a Slack user and derives the non-authoritative cosmetic display label. */
export declare function slackUser(userId: string): Promise<SlackUser>;
/** Fetches only live messages in the configured conversation. */
export declare function slackHistory(limit: number, nextCursor?: string): Promise<SlackPage>;
/** Looks up an exact timestamp without ever searching another conversation. */
export declare function slackMessage(messageTs: string): Promise<unknown>;
/** Fetches one configured-conversation thread with Slack's cursor unchanged. */
export declare function slackThread(threadTs: string, limit: number, nextCursor?: string): Promise<SlackPage>;
type UploadFile = {
    path: string;
    dev: number;
    ino: number;
    size: number;
    mtimeMs: number;
};
/** Validates local upload paths before any Slack operation is started. */
export declare function validateUploadFiles(paths: string[]): UploadFile[];
/** Sends text and, when supplied, one Slack V2 multi-file message. */
export declare function sendSlackMessage(text: string, threadTs?: string, paths?: string[]): Promise<{
    ts: string;
}>;
export declare function replyToInbox(threadTs: string, text: string, paths?: string[]): Promise<string>;
/** Produces one safe leaf name; the file ID is kept separately in the destination. */
export declare function sanitizeSlackFilename(value: unknown): string;
/**
 * Fetches a Slack file only after its live metadata proves it is shared in the
 * configured conversation. File content is written directly to private disk;
 * it never enters the control-socket response.
 */
export declare function downloadSlackFile(fileId: string): Promise<{
    fileId: string;
    localPath: string;
    name: string;
    size: number;
    mediaType: string;
}>;
export {};