Method recordCompletionEvent

pkg/middleware/telemetry.go:280–305

recordCompletionEvent 记录完成事件

(span telemetry.Span, resp *ModelResponse)

// recordCompletionEvent 记录完成事件
func (m *TelemetryMiddleware) recordCompletionEvent(span telemetry.Span, resp *ModelResponse) {
	attrs := []telemetry.Attribute{}

	// 记录响应内容长度（不记录具体内容）
	if resp.Message.Content != "" {
		attrs = append(attrs, telemetry.Int("content_length", len(resp.Message.Content)))
	}

	// 记录工具调用数量
	if len(resp.Message.ContentBlocks) > 0 {
		toolCallCount := 0
		for _, block := range resp.Message.ContentBlocks {
			// 使用类型断言检查是否为 ToolUseBlock
			if _, ok := block.(*types.ToolUseBlock); ok {
				toolCallCount++
			}
		}
		if toolCallCount > 0 {
			attrs = append(attrs, telemetry.Int("tool_call_count", toolCallCount))
		}
	}

	if len(attrs) > 0 {
		span.AddEvent(genai.EventCompletion, attrs...)
	}
}

// extractTokenUsage 从响应 Metadata 中提取 token 使用情况
func (m *TelemetryMiddleware) extractTokenUsage(span telemetry.Span, metadata map[string]any) {