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arXiv · 2606.04484

AgentJet: A Distributed Swarm Training Framework for Agentic Reinforcement Learning

Qingxu Fu·Boyin Liu·Shuchang Tao·Zhaoyang Liu·Cheng Chen·Xuanfa Jin·Rong Zhu·Bolin Ding
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Abstract

Training reinforcement learning (RL) policies for large language model (LLM) agents requires optimizing multi-turn trajectories that interact with external environments. Existing training frameworks struggle with runtime failures, single-model constraints, incompatible task environments, and redundant context. We present AgentJet, a distributed swarm training framework based on a decoupled multi-node architecture. AgentJet treats the server--client topology as configurable: swarm servers host trainable models and perform optimization on GPU clusters, while detachable swarm clients execute arbitrary agents and communicate through OpenAI-compatible APIs. Reconfiguring this topology supports heterogeneous multi-model RL, mixed-task training with isolated runtimes, fault-tolerant execution, and live code iteration through hot-swappable clients. AgentJet also introduces context tracking with timeline merging, reducing actor-update time by 6.25x on AppWorld. The same detachable-client design supports an automated research system that conducts long-horizon, multi-day RL studies on large-scale clusters with limited human intervention. AgentJet is open-source and compatible with agent systems that issue standard LLM inference requests.

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Qingxu Fu, Boyin Liu, Shuchang Tao, Zhaoyang Liu, Cheng Chen, Xuanfa Jin, Rong Zhu, Bolin Ding. 2026-07-21. AgentJet: A Distributed Swarm Training Framework for Agentic Reinforcement Learning. https://arxiv.org/abs/2606.04484

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