I just found my prompt:
The writing style could really use some work. Avoid Claude-isms like "stated fairly", em dashes, "load-bearing", overly punchy phrasing like "keep the signal, govern the response". This is a technical document, not a marketing campaign.
Like "It's not x, it's y". It actually has 4 or 5 of those counter-factual, linguistic pause, factual patterns it uses.
"The [goal/ambition/etc.] is larger: statement", is another oft repeated phrase.
And then generally, it loves dramatic pauses in statements like "x exists in y; in practice z". It's the weird punctuation it uses. A massive overuse of colons and semi-colons instead of words like and, but, because, althoughy etc. that humans normally use.
Claude responded "The arguments and structure are unchanged, but sentences now state claims directly instead of building to a turn of phrase."
I'm OK with colons and semicolons as I tend to write that way.