You'll notice
Useful2 Signal3
Plugins can now resolve from a pre-populated seed cache when their source can't be fetched.
What's wrong with this entry?
Anonymous. No account, no email.
What
When a plugin's source cannot be fetched and seed marketplaces are configured, Claude Code now checks a pre-populated cache before declaring a miss, logging "Using seed cache for … (cache-only)". It consults that cache always, or only when the plugin version is unknown, depending on the case.
Evidence
(cache-only)
Strings lifted out of the shipped bundle, so the claim above can be checked against them.