AutoEnvScaling uses a coding agent to build training environments for terminal tasks

A post describes AutoEnvScaling as a follow-up to SPADE that automates post-training environments and curriculum for terminal tasks. Its coding agent reads a reasoning agent’s rollouts, then builds, runs and fixes environments in a sandbox. The author says each checkpoint builds tasks to train the next and reports Qwen3.6-35B-A3B going from 41.1 to 53.3 on Terminal-Bench 2.1.