Checked what the AUR actually requires rather than relying on my earlier
assumption. The submission guidelines say only that packages using prebuilt
deliverables must carry the -bin suffix; nothing requires the binary to come
from upstream, so -bin is correct and sufficient here.
There is no formal 'unofficial binary' flag, so disclose it where users look:
an explicit PROVENANCE block in the PKGBUILD comment header naming the tag,
commit, build recipe and release URL, plus '(prebuilt binary)' in pkgdesc.
Corrects the README, which overstated the risk of a maintainer objecting.
agw
f0f317ca2f