# World of SWECraft: Agent Collaboration at Scale via Simulated Software Worlds > Source: > Published: 2026-10-20 08:17:52.876411+00:00 [arXiv](https://arxiv.org/abs/2610.24061) ### World of SWECraft: Agent Collaboration at Scale via Simulated Software Worlds Which summary reads better? Pick one — models revealed after.Both summaries are AI-generated. Scaling collaborative multi-agent inference-time compute across interdependent software environments improves downstream code execution efficiency by up to 31%. This proves that coordinating autonomous agent fleets is a viable vector for scaling test-time compute to optimize production codebases. However, you must implement active steering or external validation, as even frontier models frequently stop searching for optimizations prematurely and make zero progress. The best multi-agent collaboration setup improved downstream software efficiency by 31%, showing that scaling inference-time compute through agent teams can significantly boost performance on complex tasks. Engineers can now simulate and optimize agent collaboration in realistic software environments to maximize efficiency gains, but must monitor for frontier models prematurely halting improvements. This framework enables systematic testing of agent coordination strategies before deployment to ensure sustained productivity in production systems.