Agent Eng News Tuesday, August 18, 2026 · Past edition · 8 stories
Retrospective edition reconstructed from later captures. Paper versions may include later updates; coverage labels describe the evidence used.
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Agent Lightning v1.0 treats the agent harness as part of post-training, changing what the trainer observes and which implementation details can affect RL.
Why it matters: For teams training agents inside harnesses, data handling and backend scheduling are part of the RL system design: the authors say retokenization, sample merging, advantage calculation, loss normalization, and scheduling can affect training stability and effectiveness.
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