Dev.to
7/2/2026

Strands Agents + Langfuse Evaluations
Short summary
This tutorial demonstrates building a banking customer-support agent with Strands Agents (AWS's Python SDK) and evaluating it continuously using Langfuse, an open-source observability platform. It covers tracing agent calls, offline and online evaluations, prompt versioning, and routing to human reviewers. Includes a complete runnable PoC with Docker setup and step-by-step implementation.
- •Build agents with Strands Agents (AWS's lightweight Python SDK) and Langfuse observability
- •Learn tracing, offline/online evaluations, prompt management, and human annotation workflows
- •Complete runnable PoC with Docker setup and 7-step implementation walkthrough
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