wai.prior.set (SPEC §5, Prior artifacts) gets its row in the registry
table: a registered payload, media class binary, registered 2026-09-30,
with the edition left to the registration. It is listed in
GLOSSARY_NO_ENTRY as a WAI-native class. `wai registry export` regenerates
registry/capabilities.json, the table in REGISTRY.md and vocab
v2.{ttl,shapes.ttl}; `wai registry export --check` is clean, and the
registry tests that hold every registered string to one row pass again.
Co-Authored-By: Claude Opus 5.5 <[email protected]>