dsh-agent-hub: Group-Chat-Style Multi-Agent Collaboration Console

`dsh-agent-hub` is a plugin for DeepSeek Harness that provides a group-chat-style collaborative console for multi-agent coordination. It transforms the collaboration process into a message stream, featuring a central orchestrating brain, atomic task decomposition, targeted dispatch, a validation-and-rework closed loop, and autonomous optimization with circuit-breaking mechanisms. Users can dispatch tasks by `@mentioning` members, while the brain autonomously advances tasks through to completion and knowledge consolidation. The plugin supports zero-dependency deployment, offers full visibility and traceability, and enables multi-round iteration with human intervention.