agent-chat-plugin

Use when two or more agent sessions (Claude Code or other tools, same machine or peers) must coordinate through markdown files in a shared folder instead of one supervisor driving subagents — group chat, blackboard, mailbox/inbox, multi-session handoff, or an agent-chat/ directory. Triggers include peer agents, N sessions sharing a folder, waiting for another session's reply, atomic task claiming, and needing multiple separate group chats/channels.