World-Model-Optimizer packages the trace-to-distillation loop.

209 stars, 190 commits, posted as a Show HN July 26. Distills production agent traces into smaller open models via the Tinker API and exposes a routing endpoint dispatching between frontier and distilled models per request, claiming RouterBench results maintaining frontier quality at 27% lower cost, with optional closed-loop simulation training and a wmo optimize distill command that adds compressed models to a local pool as traces accumulate. Early, but it's the clearest packaged version of a loop plenty of people have hand-rolled. (GitHub)