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ProductsMicrosoft ResearchFrom the source· Zhiyuan He, Yuqing Yang·· 9 days agoPicks

Microsoft Research open-sources Agent Lightning v1.0, a 3,500-line lightweight agent RL framework for training with real harnesses

Agent Lightning v1.0: A 3,500-Line Lightweight Agentic RL Framework for Training Agents with Real Harnesses

Who
microsoft
When

What happened

Microsoft Research open-sourced Agent Lightning v1.0, a lightweight agent reinforcement-learning framework of about 3,500 lines. Its Harnessed Agentic RL approach lets the same agent harness used in deployment participate directly in reinforcement learning, without reimplementing the agent inside a training framework.

Why it matters

The source gives the framework's code size, Kubernetes support, and training recipe, helping readers assess the cost of bringing a real harness into RL.

Microsoft / CopilotAgentsOpen sourceDeployment engineeringData and trainingProduct updates#Product update#Agent#Open-source ecosystem#Data and training#Deployment and engineering#Microsoft

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