Fifty agent skills, ranked two ways. Installs is the all-time total. Trending and Hot are a skill's place in the two short-window lists skills.sh publishes under those names. Both measure recent movement rather than accumulated size, and they disagree by 29 places on average, so they are not the same list twice. What separates them is not documented, so read them as two views of momentum rather than as a ranking you can reason about precisely. There are no ratings anywhere in the ecosystem and no usage count separate from installs.
All three lists rank within the 400 skills this site tracks, not across the whole directory. The corpus caps each source repo at eight entries, so a few skills that sit high on skills.sh own trending and hot lists are missing here by design.
Installs count bundles too. When someone installs a repo, every skill in it is counted, so a popular collection lifts all of its own entries at once.