For example, "terms.md" page:
Term 1 {#term-1}
: Detail 1
Term 2 {#term-2}
: Detail 2
Term 3 {#term-3}
: Detail 3
Are generated correctly, a link like [Term 2](terms/#term-2) gets to it in the browser, but retypes warns:
WARNING: [my-page.md:123] Page anchor "terms/#term-2" was not found.