做通用智能体研究的团队会发现，当前缩放策略的盲点被戳中了——环境规则集的分布偏移才是泛化瓶颈，值得重新审视自己的实验设计。
这篇立场论文提出，通用智能体需要环境缩放（environment scaling）来适应训练分布之外的多样任务和未见环境。当前缩放实践主要关注在固定交互规则下收集更多经验或任务，导致智能体在底层接口、动态、观测或反馈信号变化时表现脆弱。作者将轨迹缩放、任务缩放和环境缩放区分开来，并提出了统一分类法。论文对比了程序化生成器（可控、可验证）和生成式世界模型（覆盖广、开放）两种构建可扩展环境的范式。最后，论文认为可扩展环境是实现鲁棒通用智能体的关键基础。
Scalable Environments Drive Generalizable Agents
Generalizable agents should adapt to diverse tasks and unseen environments beyond their training distribution. This position paper argues that such generalization requires environment scaling: expanding the distribution of executable rule-sets that agents interact with, rather than only increasing trajectories or tasks within fixed benchmarks. Current scaling practices largely focus on collecting more experience or broader task sets under fixed interaction rules, leaving agents brittle when underlying interfaces, dynamics, observations, or feedback signals change. The core challenge is therefore a world-level distribution shift: agents need systematic exposure to environments with meaningfully different executable rule-sets. To clarify this challenge, we propose a unified taxonomy that separates trajectory scaling, task scaling, and environment scaling by their primary deliverables and by what changes in the executable rule-set. Building on this taxonomy, we synthesize construction paradigms for scalable environments, contrasting programmatic generators that prioritize controllability and verifiability with generative world models that offer broader coverage and open-endedness. We further outline how environment scaling can be coupled with stateful learning mechanisms, emphasizing learned update rules for cross-environment adaptation. We conclude by discussing alternative perspectives and argue that scalable environments provide the essential substrate for measurable and controllable progress toward robust general agents.