## Project vocabulary — canonical terms: use VERBATIM in any language, marked `like this` ```text «app-contract» `reference` a NURI that names a document and grants nothing — what an application circulates (never: link, lien, share-link · see: contract_polyfill-surface) `ReadCap` upstream's word for what opens a document — a reference carrying its secret (never: token, credential, permission) `polyfill-era` a published symbol with no counterpart in the target SDK, deleted at migration (never: transitional, shim-only · see: knowledge_what-an-app-deletes-at-migration) ```