/pets is the collection — installed pets with the active one marked, plus
/pets gallery to browse the petdex catalog. /pet is selection only: /pet
<slug> to bring one out, /pet off to put it away, bare /pet for status.
Both are cli_only — a sprite can't render in a Telegram/Slack message (which
is why /pet never had a gateway handler), so they stay on the CLI/TUI/desktop
surfaces and out of the messaging menus, keeping Slack under its 50-slash cap.
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