Under the hood
Useful2 Signal3
Phone and remote interfaces are now told which slash commands only make sense in a terminal.
What's wrong with this entry?
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/color
What
The session init payload sent over the control protocol now includes an optional list of slash commands whose behaviour only makes sense in a local terminal, such as /color, so phone and remote interfaces can hide them. The list is sent only when it is non-empty.
Evidence
Subset of slash_commands whose UX is bound to the local terminal (e.g. exit, statusline).
Strings lifted out of the shipped bundle, so the claim above can be checked against them.