/**
 * Thread view reconstruction for Braintrust.
 *
 * Reconstructs LLM output in OpenAI Chat Completion format by examining
 * child MODEL_STEP and TOOL_CALL spans. This enables Braintrust's Thread
 * view to properly display the full conversation flow including tool calls.
 *
 * See THREAD_VIEW_RECONSTRUCTION.md for details.
 */
import type { OpenAIMessage } from './formatter.js';
/**
 * Tool call data accumulated from MODEL_STEP and TOOL_CALL spans
 */
export interface ThreadToolCall {
    toolCallId: string;
    toolName: string;
    args: unknown;
    result?: unknown;
    startTime?: Date;
}
/**
 * Step data accumulated from MODEL_STEP spans for Thread view reconstruction
 */
export interface ThreadStepData {
    stepSpanId: string;
    stepIndex: number;
    text?: string;
    toolCalls?: ThreadToolCall[];
}
/**
 * Accumulated data for reconstructing Braintrust Thread view.
 * Populated for MODEL_GENERATION spans as child MODEL_STEP and TOOL_CALL spans complete.
 */
export type ThreadData = ThreadStepData[];
/**
 * Tool result data stored when TOOL_CALL spans end (before MODEL_STEP ends)
 */
export interface PendingToolResult {
    result: unknown;
    startTime: Date;
}
/**
 * Reconstruct the Thread view output from accumulated threadData.
 * Converts to OpenAI Chat Completion message format.
 */
export declare function reconstructThreadOutput(threadData: ThreadData, originalOutput: unknown): OpenAIMessage[];
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