Microsoft / post-training

Engineering and algorithmic interventions for multimodal post-training at Microsoft scale (opens in new tab)

Aditya Challapally leads post-training research and infrastructure for Copilot agent capabilities that process millions of multimodal interactions. This post builds on the diagnostics from Diagnosing instability in production-scale agent reinforcement learning with the engineeri…

Diagnosing instability in production-scale agent reinforcement learning (opens in new tab)

On January 28, 2026, Hugging Face announced that they have upstreamed the Post-Training Toolkit into TRL as a first-party integration, making these diagnostics directly usable in production RL and agent post-training pipelines. This enables closed-loop monitoring and control pat…