Found 0 links in the cache...
I couldn’t figure it out right away, but the reason actually is that my
original design was to build the site in the
script target and run the test
after_success target. Sounds logical, no? But the cache is updated
after_success and not after, so the link cache never gets added to
build cache. This is also documented in the docs.
So to add and upload HTMLProofer’s cache I moved the site test into the
script target too.