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Published by LangChain Blog (T1.5 source). The original is at https://www.langchain.com/blog/building-agent-environments-and-tasks.

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LangChain describes their methodology for building synthetic agent environments and tasks: a spec generation step, a spec-to-task step, and a world spec holding shared knowledge. Defines Agent, Rubric, Task, and Dataset as core primitives for agent evaluation.

Firsthand vendor methodology for structuring agent eval tasks. Useful for teams building benchmarks or synthetic environments, though tied to LangChain's specific framing.

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