On a different system with claude context, installed SDK and built skills.
It eventually got to that answer, but it should be more direct.
https://github.com/villagesql/villagesql-server/releases
FWIW, neither https://github.com/villagesql/villagesql-skills or https://github.com/villagesql/villagesql-skills/tree/main/skills/vsql-extension-builder spell it our as a pre-requisite.
Regarding your other question — can the extension builder skill work with just the prebuilt binary? Yes, the vsql-extension-builder skill only needs the VillageSQL SDK (headers + cmake modules) to build, and