Thanks, that's the reason I added it. To your question: mostly rules onsystem doesn't have, not files it missed. @shadcn/lint scored only the one file each run created, which the hook also checks. Of the 2.64 left per run:

• 1.97 is no-restyle: classes that change a design-system component's color, typography or spacing. onsystem doesn't report that, and whether an override is wrong depends on the design system.
• 0.60 is no-raw-colors, which flags the same kind of error onsystem shows the agent, so on colors it agrees with onsystem more than it confirms it. Most of that 0.60 comes from one model, gemini-3.5-flash-lite.
• The other four rules add up to 0.07.

One more caveat: I added this scoring after the standard run, so it wasn't one of the outcomes fixed before any run.

The per-rule and per-model numbers, and the command to rescore the runs yourself (it calls no model), are in the "Independent scorer" section of the benchmark page linked in the post.