import type { TToolStatus } from "../../../types/index.js";
import { OpenAIStreamEventLike } from "../types/openAiTypes.js";
export type StreamEventTextDelta = {
    kind: 'text_delta';
    delta: string;
};
export type StreamEventToolAdd = {
    kind: 'tool_add';
    id: string;
    toolName: string;
    serverLabel?: string;
    /** Initial status; use 'waitingConfirmation' for mcp_approval_request, 'waitingSubmission' if API defines such. Default 'loading'. */
    status?: TToolStatus;
    /** Optional payload to show in tool card (e.g. approval request arguments). */
    headerContent?: string;
    /** MCP request arguments, pretty-printed JSON. Surfaced for AIStudioChat's tool renderer. */
    mcpRequest?: string;
};
export type StreamEventToolUpdate = {
    kind: 'tool_update';
    item_id: string;
    status: TToolStatus;
    toolName?: string;
    output?: string;
    error?: string;
    /** MCP request arguments, pretty-printed JSON. */
    mcpRequest?: string;
    /** MCP response or error, pretty-printed JSON. */
    mcpResponse?: string;
};
export type StreamEventThinkingAdd = {
    kind: 'thinking_add';
    item_id: string;
};
export type StreamEventThinkingDelta = {
    kind: 'thinking_delta';
    item_id: string;
    delta: string;
};
export type StreamEventThinkingDone = {
    kind: 'thinking_done';
    item_id: string;
    text: string;
};
export type StreamEventContentUpdate = StreamEventTextDelta | StreamEventToolAdd | StreamEventToolUpdate | StreamEventThinkingAdd | StreamEventThinkingDelta | StreamEventThinkingDone;
/** Stream event → content update (text delta, tool add/update, thinking add/delta/done) or null. */
export declare function getStreamEventContentUpdate(event: OpenAIStreamEventLike | null | undefined): StreamEventContentUpdate | null;