Naven
Glossary
Cache
A stored copy of something, kept so it does not have to be fetched or computed again.
Caches exist at every layer: the browser keeps files it already downloaded, a CDN keeps copies near users, a server keeps results it already calculated. Each one trades freshness for speed.
The hard part is invalidation — knowing when a copy has gone stale. A cache that holds on too long serves an old version of a site long after it changed, which is the most common cause of "it works for me".
Where Naven stands
Naven's built files carry content hashes in their names, so a new version is a new filename and no cache has to be persuaded to let go of the old one.