According to God of Prompt on Twitter, LobeHub has introduced its L4 agent harness, marking a significant advancement in collaborative AI. The platform enables users to build and coordinate teams of agent coworkers for complex tasks, signaling the end of L3 agents and the emergence of L4 capabilities. As reported by the official LobeHub announcement, the service is currently invite-only, offering incentives such as credits for new users and referrals. This launch highlights evolving trends in multi-agent systems and presents new business opportunities for organizations seeking scalable AI-driven workflows.