Chat-template fix restores reasoning in a visual agent environment

mervenoyann · x · 2026-07-27

The author says they fixed a chat-template bug in their environment, after which reasoning started working again. They currently feed only instructions plus 9 past frames per iteration, want to run ablations on the number of frames, and plan to move on to fine-tuning. The quoted context adds that they chose a Unity-based visual push-block environment, found the model tends to go straight and get stuck without training or prompt tweaks, and enjoyed the OpenEnv workflow enough to continue experimenting with GEPA and TRL.

Original post →

More from coding & agent

coding & agent channel →