HighlighterMarkup

An invented grounding checker that marks up model output the way a person would, in highlighter. Every brand on it is invented and every figure is made up, so there is nothing to unpick before you start.

View the full page

Scroll inside the frame, or open it on its own for the full width.

Where this page came from

It is an adaptation, not ours from nothing, and the licence it arrived under is the reason it can be here at all.

The original
Highlighter Markup Page, by Ray Velez
Licence
MIT, the source
What was changed
New brand, copy and figures, and a retuned palette.

What it is for

A page whose whole visual argument is annotation: text marked up in highlighter, struck through, underlined and pulled out into the margin, which is the product demonstrated rather than described.

Take it

One prompt, not two. An effect ships a second copy with its source pasted in for agents with no web access; a page this size has nothing sane to inline, so this one fetches the files and writes them where you say.

Paste into Claude Code, Cursor or any agent. Pinned to a tag, so it will not change under you.