Function endToolPerfettoSpan

src/utils/telemetry/perfettoTracing.ts:727–763

(
  spanId: string,
  metadata?: {
    success?: boolean
    error?: string
    resultTokens?: number
  },
)

 * End a tool execution span
 */
export function endToolPerfettoSpan(
  spanId: string,
  metadata?: {
    success?: boolean
    error?: string
    resultTokens?: number
  },
): void {
  if (!isEnabled || !spanId) return

  const pending = pendingSpans.get(spanId)
  if (!pending) return

  const endTime = getTimestamp()
  const duration = endTime - pending.startTime

  const args = {
    ...pending.args,
    success: metadata?.success ?? true,
    error: metadata?.error,
    result_tokens: metadata?.resultTokens,
    duration_ms: duration / 1000,
  }

  // Emit end event
  events.push({
    name: pending.name,
    cat: pending.category,
    ph: 'E',
    ts: endTime,
    pid: pending.agentInfo.processId,
    tid: pending.agentInfo.threadId,
    args,
  })

  pendingSpans.delete(spanId)
}

/**
 * Start a user input waiting span