import type { PlatformAdapter, RichBlock, ActionElement } from '../../platform/index.js';
export type SystemNoticeLevel = 'info' | 'warning' | 'error';
export interface SystemNoticeInput {
    /** The notice body (same text that goes to the admin channel). */
    text: string;
    /** Severity — defaults to 'info'. warning/error render as resident toasts in the Web UI. */
    level?: SystemNoticeLevel;
    /** Optional short title (e.g. "Disk", "Rate limit"); the Web UI falls back to a level label. */
    title?: string;
    /** Optional platform-native content; Web notices continue to use the secret-free text fields. */
    richBlocks?: RichBlock[];
    /** Optional action buttons attached to the platform post (Slack/Feishu interactive).
     *  When present the notice is delivered via postInteractive; absent keeps postMessage. */
    actions?: ActionElement[];
}
/** Publish a `system.notice` event on the shared EventBus (the Web notification-toast source).
 *  No-op when no bus is wired (matches publishSessionMessage). */
export declare function publishSystemNotice(p: SystemNoticeInput): void;
/** Send a system notice through BOTH channels: publish it to the Web live stream AND post it to
 *  the platform-configured admin channel. The bus event is published first so the Web toast fires
 *  even when no admin channel is configured or the platform post fails. Returns whether the
 *  platform post succeeded. Never throws. */
export declare function emitSystemNotice(adapter: PlatformAdapter, p: SystemNoticeInput): Promise<boolean>;