Here is what happened:
xxx/ % sudo rm -f /tmp/.com.apple.dt.CommandLineTools.installondemand.in-progress
Password:
xxx/ % sudo rm -rf /Library/Caches/com.apple.SoftwareUpdate/*
sudo killall -9 softwareupdated
zsh: no matches found: /Library/Caches/com.apple.SoftwareUpdate/*
killall: warning: kill -kill 555: Operation not permitted
xxx/ % softwareupdate -l
Software Update Tool
Finding available software
Software Update found the following new or updated software:
Label: Command Line Tools for Xcode 26.4-26.4.1
Title: Command Line Tools for Xcode 26.4, Version: 26.4.1, Size: 920104KiB, Recommended: YES,
xxx/ %