Ending the Agent Framework Debate: A Composable 3-Layer Architecture
hwchase17 · x · 2026-08-07
To resolve the common confusion over which framework to choose when building AI agents, the post proposes a clear 3-layer architecture: Harness at the top, Framework in the middle, and Runtime at the floor. This design emphasizes full composability.
Developers can feed this architecture diagram to Claude to determine which layer their specific needs belong to, guiding their setup. Additionally, the post references a LangChain blog article deeply comparing the distinctions and use cases for Deep Agents, LangChain, and LangGraph.
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