HiSTEVE 1.0: A Hierarchical VLA Agent for Open-World Games

HiSTEVE 1.0 is a hierarchical VLA agent that achieves long-horizon autonomy and native keyboard-and-mouse control in Minecraft through a capability-aware agent harness. Its orchestration layer uses structured memory to track progress, with a VLM planner selecting subtasks within the VLA's capabilities; the control layer uses a single VLA to execute all subtasks with vision-only perception.