Observability

OpenLLMetry (Traceloop)

OpenTelemetry-native observability SDK for standardized LLM and agent tracing.

Overview

OpenLLMetry provides open-source instrumentation that automatically captures LLM calls, prompts, and responses as OpenTelemetry spans. It avoids vendor lock-in by design, exporting traces to any OTel-compatible backend like Jaeger, Datadog, or Honeycomb.

Best for

Infrastructure-standardized tracing
Multi-backend observability

Trade-offs

vs Helicone

OpenLLMetry wins for infrastructure teams wanting OTel standards and backend flexibility; Helicone provides richer API gateway features, cost tracking, and out-of-the-box caching.

What XeroHack pre-wires

When you pick OpenLLMetry (Traceloop) in the interview, the engine emits these files into your scaffold:

traceloop.init(app_name='...')
OTel exporter to Datadog/Jaeger

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