import { type ChatMessageMetadata, type ChatStreamEvent, type ChatUiMessageChunk } from "../../chat/protocol.js";
import { type ConversationRunEvent, ConversationRunEventEncoder } from "./run-events.js";
import type { StreamLifecycleFrame } from "../streaming/lifecycle/index.js";
/** Event emitted for to conversation run stream. */
export declare function toConversationRunStreamEvent(chunk: ChatUiMessageChunk<ChatMessageMetadata>): ChatStreamEvent;
/** Prepare conversation run stream events. */
export declare function prepareConversationRunStreamEvents(events: ChatStreamEvent[], encoder?: ConversationRunEventEncoder): ConversationRunEvent[];
/** Prepare conversation run chunk events. */
export declare function prepareConversationRunChunkEvents(chunks: ChatUiMessageChunk<ChatMessageMetadata>[], encoder?: ConversationRunEventEncoder): ConversationRunEvent[];
/** Prepare conversation run external events. */
export declare function prepareConversationRunExternalEvents(events: ConversationRunEvent[]): ConversationRunEvent[];
/**
 * Pure version 2 preparation entry point for fixtures and the future Stream
 * Delivery module. No production mirror calls this in Gate 4: wiring it into a
 * hosted mirror before a source-tagged delivery contract exists would
 * double-write lifecycle-owned UI chunks and lose local tool events that occur
 * after handoff.
 */
export declare function prepareConversationRunLifecycleEvents(input: {
    runId: string;
    attemptId: string;
    attemptIndex: number;
    messageId: string;
    frames: readonly StreamLifecycleFrame[];
}): ConversationRunEvent[];
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