import { type ChatStatus, type UIMessage } from "ai";
export interface MessageActivity {
    kind: "searching" | "thinking" | "tool";
    label?: string;
}
export declare const isChatInProgress: (status: ChatStatus) => boolean;
export declare const isActiveAssistantMessage: ({ index, messages, status, }: {
    index: number;
    messages: UIMessage[];
    status: ChatStatus;
}) => boolean;
export declare const shouldShowPendingActivity: ({ messages, status, }: {
    messages: UIMessage[];
    status: ChatStatus;
}) => boolean;
/** Activity labels keyed by tool name, from `ai.toolLabels`. */
export type ToolActivityLabels = Readonly<Record<string, string>>;
export declare const getMessageActivity: ({ inProgress, parts, toolLabels, }: {
    inProgress: boolean;
    parts: UIMessage["parts"];
    /** Labels that replace "Running <tool>..." for the named tools. */
    toolLabels?: ToolActivityLabels;
}) => MessageActivity | null;
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