Why it matters

Trace viz shapes understanding. Understanding shapes debug UX.

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The architecture

Timeline view of steps.

Nested tool calls.

Latency + cost bars.

LLM message inspector.

Trace viz componentsStep timelinesequentialNested toolsexpandMetrics barslatency + costLangfuse + LangSmith + Braintrust + Arize Phoenix all provide agent trace viz
Trace viz.
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How it works end to end

Langfuse / LangSmith / Phoenix.

Custom Grafana + Tempo also possible.

Span attributes surface details.