Auditing what the build renders

Every page exists as a string in memory the moment before it is written to disk. Reading it back to see what it claims about itself is close to free, and it catches the regressions that otherwise surface weeks later in someone else's audit tool.

The checks worth having are the ones a person cannot hold in their head across a whole site: a title duplicated on two pages, an id used twice, a heading outline that skips a level, a link whose only text is the word here.

One check earned its keep immediately. Two elements on the same page both claimed to be the current page, and a screen reader announced whichever came first. The nav should have said it was the current section, not the current page.