Commands

Discover slash commands: essentials explained in plain language, searchable list of everything installed, a form to create your own, and tips when a command fits what you just typed.

Snapshots the working tree into hidden git refs at the start of every turn, with /checkpoints to list them and /undo-turn to roll back.

A Design workspace in Claude Code: see design options for a UI as images, select one, ask for more, ask for a change with a note and hand an option off to be built. Your agent runs the 12ui command line once per request, which draws every option at once with your own Codex sign-in.