What probably matters to youSection of the release
Unclear It is not clear what turns on the setting for listing when-to-use text, or whether it is on by default.
What
Skills and commands can now set a listingDescription field in their frontmatter, the block of settings at the top of the file. It sits next to the existing menuDescription field.
The line that lists a skill for the model changes too. A skill's when-to-use text is now added only in these cases:
the skill is marked to always list it
a setting turns on listing when-to-use text
Before, the when-to-use text was added whenever a skill had one.
Why
The skill list the model sees can be shorter. A skill's when-to-use text may no longer reach the model unless one of those cases applies.