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Source: Al0065UseTokenUsageHistogramAnalyzer.cs

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Description

Token usage metrics should use the gen_ai.client.token.usage histogram name defined in OpenTelemetry GenAI semantic conventions.

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Bad Code

var counter = meter.CreateCounter<long>("token_count");
counter.Add(response.Usage.TotalTokens);

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Good Code

var histogram = meter.CreateHistogram<long>("gen_ai.client.token.usage");
histogram.Record(response.Usage.TotalTokens,
    new("gen_ai.token.type", "total"));

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Properties

  • Category: GenAI
  • Severity: Warning
  • Enabled by default: True
  • Code fix available: False

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Configuration

dotnet_diagnostic.AL0065.severity = warning