diff --git a/resources/boost/skills/livewire-material-development/SKILL.md b/resources/boost/skills/livewire-material-development/SKILL.md
index c2d05436..6e084215 100644
--- a/resources/boost/skills/livewire-material-development/SKILL.md
+++ b/resources/boost/skills/livewire-material-development/SKILL.md
@@ -88,7 +88,7 @@ Scheme::resolveProfileUsing(fn (): ?string => Setting::get('color_profile'));
 
 ## Tokens
 
-Tailwind's default palette is cleared: every colour class names an M3 role. `text-red-600`, `bg-base-200` or `text-gray-500` compile to nothing.
+Tailwind's default palette is cleared: every colour class names an M3 role. `text-red-600`, `bg-base-200` or `text-gray-500` compile to nothing. The rules behind the names below — which role, surface container, corner, type style, elevation level, motion spring, state and window size class to use, and M3's don'ts — are the `material-3` guideline (always on) and the `material-3-design` skill (the tables and Google's source pages); activate that skill before designing a screen.
 
 - Colour roles (`bg-*`, `text-*`, `border-*`, …): `primary`, `on-primary`, `primary-container`, `on-primary-container`, `inverse-primary`, `primary-fixed`, `primary-fixed-dim`, `on-primary-fixed`, `on-primary-fixed-variant`; the same for `secondary` and `tertiary`; `error`, `on-error`, `error-container`, `on-error-container`; `success`, `warning` and `info` with their `on-`, `-container` and `on-…-container`; `inverse-error|success|warning|info`; `surface`, `surface-dim`, `surface-bright`, `surface-container-lowest|low||high|highest`, `on-surface`, `on-surface-variant`, `inverse-surface`, `inverse-on-surface`, `outline`, `outline-variant`, `scrim`, `shadow`; plus `white` and `black`.
 - Ink and lines by meaning: `text-body` (body copy), `text-meta` (metadata), `text-quiet` (decoration only), `border-structure`, `border-chrome`, `border-divider` / `divide-divider`.