The tip text "Use /btw to ask a quick side question without interrupting Claude's current work" has been removed. Note: The /btw command itself still exists and functions — only the tip promoting it has been removed.
Evidence
Tip string "Use /btw to ask a quick side question" removed; /btw regex pattern still present (search for "/btw")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
