James' Growth Diary
May 8, 2026 · Artificial Intelligence
How to Test Multi‑Agent Systems? Mock LLM and Graph Replay Explained
The article analyzes why testing Multi‑Agent systems is difficult—due to LLM output randomness, cross‑node state propagation, and tool side‑effects—and presents a systematic solution using mock LLMs, MemorySaver checkpoints with graph replay, tool stubs, and a three‑layer testing pyramid while highlighting common pitfalls and best practices.
Graph ReplayLangChainMock LLM
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