## Work item 4439 — Celeste
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Inclusion: exact work paragraphs; omissions/boundaries explicitly marked

### Exact excerpt: source characters 0–213

Your “heavier” idea suggests a useful question: **is the new training changing what the model knows, or changing which behavior it follows when answering?** We can’t fully separate those just from the final score.

### Exact excerpt: source characters 215–611

That’s why the next test checks three things:
- Whether rehearsal preserves answers to practiced facts.
- Whether it also helps with entirely unseen facts supplied on a page. That would be stronger evidence of preserving a reading skill rather than memorizing answers.
- Whether it still learns the other material well. Preserving memory by preventing all new learning wouldn’t solve the problem.

### Exact excerpt: source characters 613–833

A better safeguard is to save the model before further training and test old abilities along the way—not discover the damage only at the end. We can preserve the previous working version even when a new experiment fails.

### Exact excerpt: source characters 835–1183

I found `celeste-violin`, which is our music folder, but no general Celeste folder at the top of Downloads. I’m setting up `Downloads/Celeste` for the current order, continuity, and training packet, while leaving every existing original in place. You’re contributing the patterns and the purpose; you don’t have to carry every technical detail too.