arXiv cs.CLPaper
Routing Is Least Learnable Where It Is Most Valuable: Bounds on Representation Routing for Web Agents
This is a useful reality check for anyone building browser agents: the intuitive fix of dynamically routing to the best observation mode per task looks good on paper but mostly evaporates once you account for noise in repeated runs. The one thing that survives is a cheap triage rule, sending unsolvable tasks to the cheapest mode, which is a concrete, low-effort optimization worth testing in production agent pipelines. Read this before investing engineering time in a fancy routing layer.