export interface KnownImUser {
    platform: string;
    userId: string;
    firstSeenAt: string;
    lastSeenAt: string;
    lastChannelId?: string;
    lastThreadId?: string;
}
/** Returns true iff at least one IM admin is configured. */
export declare function isAllowlistConfigured(): boolean;
/** Returns true iff the caller is in IM admin list. */
export declare function isAdmin(platform: string, userId: string | undefined): boolean;
/** List configured IM admins. */
export declare function listAdmins(): Array<{
    platform: string;
    userId: string;
}>;
/** List known IM users discovered from real inbound messages. */
export declare function listKnownImUsers(): KnownImUser[];
/** Record that an IM user has interacted with agim. */
export declare function recordSeenImUser(platform: string, userId: string | undefined, meta?: {
    channelId?: string;
    threadId?: string;
}): boolean;
/** Promote an IM identity to admin (idempotent). */
export declare function promoteAdmin(platform: string, userId: string, opts?: {
    actor?: string;
    traceId?: string;
}): Promise<boolean>;
/** Revoke admin permission from an IM identity (idempotent false on missing). */
export declare function revokeAdmin(platform: string, userId: string, opts?: {
    actor?: string;
    traceId?: string;
}): Promise<boolean>;
export declare function denialMessage(platform: string, userId: string | undefined): string;
/** Startup diagnostics. */
export declare function logStartupResolution(): void;
/** Test-only reset. */
export declare function _resetCache(): void;
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