AGENT LIGHTNING V1.0: TOWARDS HARNESSED AGENTIC RL

Summary from the TLDR AI newsletter

Agent Lightning v1.0 offers a lightweight framework for harnessed agentic RL, implemented in 3,500 lines of code. It focuses on integrating arbitrary agent harnesses, enabling exploration of challenges like retokenization and training stability. Evaluated on various agent tasks, it improves Qwen3.5-9B's performance on SWE-bench Verified by 14.6 points using just 6K training examples.