Parse-error overlay
This is what the dev server shows when a .rat file fails to parse. The live overlay lives in internal/server/error_page.go. This page mirrors its markup so you can preview the look.
Markdown emphasis leaks into an expression
A bare * in body prose becomes <em> during the markdown pass. In expression position, the parser hits an inline HTML tag where it wants an operand. The hint line comes from the catalog in internal/parser/diagnostic.go.
parse errorpages/sample.rat:3:10
page: assign rhs: unexpected token "<"
hintlooks like markdown emphasis leaked into an expression. Escape the asterisks with a backslash in body prose, or use × for a literal multiply sign.
1 │ > page 2 │ <h1> playground> 3 │ n << a + <em>x</em> ^
Add new hint signatures on the dev-workflow errors page.