False positive: Wrongly flagging "public" as a mass noun when it's an adjective

**What got flagged?**

> includes one public customizable status page with an SSL subdomain.

**Why is this incorrect?**

A mass noun after "one" (if it's not also a count noun) would be an error, as in "one equipment".
But in this case "public" is also an adjective qualifying "status page".

Reproduce the quoted sentence in Harper and confirm that “public” is being flagged as a mass noun. Locate the Rust grammar rule or entry point producing the diagnostic; done means the adjective use is accepted while a genuine mass-noun error such as “one equipment” remains flagged.

Written by the indexing model from the issue text.