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Published by LangChain Blog (T1.5 source). The original is at https://www.langchain.com/blog/what-is-eval-driven-development.

Pipeline notes

The summary and note below are generated by the signal pipeline — they are Beyond Desk’s reading, not quotations from the source.

LangChain explains eval-driven development for nondeterministic AI agents: define desired behavior, write evaluations before changes, score runs against metrics, and use results to guide experiments, adapting test-driven development with flexible, sometimes LLM-judged evaluations.

Provides a concrete three-step process for measuring agent behavior consistently and checking whether changes improve performance or introduce regressions.

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