Show HN: Claude Relay – local Claude Code sessions message each other (github.com)

The newly announced Claude Relay, a plugin for Claude Code, enables local sessions to communicate with each other using natural language, greatly enhancing collaborative coding environments. Users can operate multiple Claude sessions across different projects and seamlessly send inquiries such as "ask the backend session if the auth token shape changed," allowing for real-time feedback and updates. This inter-session communication aims to streamline workflows, making it easier for developers to coordinate without switching contexts or dealing with complex integrations. This significant development holds potential for the AI/ML community as it introduces real-time, conversational interactions between AI-powered coding sessions, fostering collaborative project management. Despite being in a research preview stage, the plugin requires just a few command-line instructions to set up, making it relatively easy for developers to experiment with its capabilities. Key technical aspects include the need for the MCP server to manage communication and the requirement for a single-user, local setup, emphasizing its current limitations; however, the developers aim to submit it for review to promote broader access and eliminate the "dangerously" prefix in future releases.