Launching N parallel Rhino MCP sessions
Follow the procedure in the /launch-rhinos slash command. It owns the full flow — slot probing, OS-specific launch (sequential on macOS, parallel on Windows), listener wait, and the agent fan-out. Pass through the count and the version argument; default version to 8. Use only the pre-declared slots in .mcp.json (rhino, rhino-2 … rhino-8).