/start shows only Claude Code's /plugin marketplace add and /plugin install. The plugin now also installs in Codex CLI, Copilot CLI, VS Code's agent, Cursor and Gemini CLI (#258, #259), and plugin/agents-md/AGENTS.md covers harnesses without hooks (#260).
/start could point at plugin/README.md#other-harnesses, or show each harness's two commands. Either way it is human-facing copy, so it is the owner's to word. A placeholder such as bathysphere in each new slot keeps them easy to find.