A token name nothing declares

The browser does not warn. A var() that cannot resolve makes its whole declaration invalid, so the property falls back to its initial value: the font becomes the browser default serif, padding becomes 0, the border disappears. The page still renders, the source still looks tokenised, and every file-based review passes it. In a live run three of four pages invented their token names this way and shipped mostly unstyled. jig check reads every custom property the project declares — the token layer, its own stylesheets, a Tailwind @theme, style attributes — and reports each reference to one that is not there. A reference with a fallback, var(--x, 1rem), resolves, and is not reported.