Observability for LangGraph Runs: Traces, Metrics, and Evals (ANSWERED)
TL;DR — Quick Answer
Trace each node execution with LangSmith/OpenTelemetry; metrics on path frequency, latency, errors, token cost; log state diffs redacted; run online evals on outputs; alert on routing anomalies.
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What should you instrument in production LangGraph workflows?
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