versioning

The repository changes log records product versions in "init V", "upd V" and "int V" logs.

quality and milestone markers

The "int V" logs indicate an intermediate commit not intended for checkout.

The "upd V" logs indicate code that compiles.

The last "upd V" record will coincide with a download version (V) archive for release candidates.

The use and status of consumers are the best indicators of the quality of a release candidate in that application.