Function createEventRecording

testing/panel/src/lib/recording.ts:47–529

(
  filePath: string,
  traceId?: string,
)

 * // Call recording.stop() when done to unsubscribe
 */
export function createEventRecording(
  filePath: string,
  traceId?: string,
): {
  stop: () => void
  getStreamId: () => string | undefined
} {
  // Track active streams and their data
  const activeStreams = new Map<
    string,
    {
      streamId: string
      requestId: string
      model: string
      provider: string
      chunks: Array<{
        chunk: StreamChunk
        timestamp: number
        index: number
      }>
      accumulatedContent: string
      toolCalls: Map<string, RecordedToolCall>
      finishReason: string | null
      traceId?: string
    }
  >()

  // Track which streamId belongs to this recording (if traceId is provided)
  let recordingStreamId: string | undefined

  let chunkIndex = 0

  // Helper to reconstruct StreamChunk from events
  const createContentChunk = (
    content: string,
    delta: string | undefined,
    model: string,
    timestamp: number,
    id: string,
  ): StreamChunk => ({
    type: 'content',
    content,
    delta: delta ?? '',
    model,
    timestamp,
    id,
  })

  const createToolCallChunk = (
    toolCallId: string,
    toolName: string,
    index: number,
    arguments_: string,
    model: string,
    timestamp: number,
    id: string,
  ): StreamChunk => ({
    type: 'tool_call',