Name the clean crop for what it is

The second crop carries no wordmark, for surfaces that set their own type: the
site can letter it in live Ubuntu Light small caps rather than in pixels, which
stays selectable, scales without the lattice fighting the text, and follows the
brand if the brand moves. The lettered crop stays for surfaces that cannot set
type at all.

Both were committed under a filename that recorded which run produced them
rather than what they are.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

docs/assets/eureka-mascot.prompt.md

@@ -42,6 +42,23 @@ identifier here** — it is the one piece of provenance still missing.
 The intermediate uncropped 627×627 repixelization is not kept, because step 2
 rebuilds it exactly.
 
+## The two crops
+
+- **`eureka-mascot.png`** carries the wordmark burned in, and is what the README
+  shows through `eureka-mascot-4x.png`. Use it where the surface cannot set
+  type: a README, a repository card, anywhere the image has to arrive as one
+  thing.
+- **`eureka-mascot-clean.png`** is the same crop with **no wordmark**, for
+  surfaces that set their own type — the site, a header that wants the name in
+  live Ubuntu Light small caps rather than in pixels. Live type there is better
+  than burned-in: it stays selectable, it scales without the mascot's lattice
+  fighting the text's antialiasing, and it will track the brand if the brand
+  moves.
+
+Each has its editable Krita original beside it. **When one crop changes, change
+the other**, or the two will drift and the site will quietly disagree with the
+README about what Eureka looks like.
+
 Style anchor: `F:\Projects\Epiphany\docs\assets\epiphany-avatar-4x.png` —
 detailed pixel art, anime-styled figure, dense labelled environment, one HUD
 panel of typed state, a single saturated accent doing the lighting. Eureka is