You'll finish with: Colour hierarchy and voice rules corrected via Remix.
The system you published in chapter 02 is not final. Brands change, and so does what you learn about how yours behaves once you have used it a few times. Both are fixed the same way, and you never re-upload anything.
Remix opens a chat on the left side of the window. You change the design system by talking to it, the same as everything else. Nothing gets re-uploaded and nothing gets rebuilt from scratch.
What's worth fixing after a fortnight
All fixable by asking, not re-uploading.
The most common extraction fault. You gave it three colours, so it uses all three equally, everywhere. Tell it the hierarchy explicitly.
A design system that nails your colours but writes like a different company still produces work you have to rewrite. Add your voice rules — how headlines sound, what phrases you avoid, your tone. Visual and verbal in the same place.
Your accent colour appears sparingly instead of everywhere, and the copy sounds like something you'd have written.
If the accent still turns up all over the page, you probably named the colours again instead of stating the hierarchy. "Teal is an accent" is not a rule Claude can act on. "Teal on buttons and key numbers only, never as a background fill" is.