Scaldeo checks its own output against a list of words that make writing sound machine-made. Delve. Tapestry. Utilize. Showcase. If the model uses one, the section is rejected and rewritten.
The list also contained "leverage".
What went wrong
A script about car wash economics reached section five: a comparison of two chains, one of which went bankrupt under its debt load. The model wrote the section correctly and used the word "leverage", because that is the word for what happened.
The contract rejected it. The model tried again, used it again, and was rejected again. After three attempts the generator gave up and discarded the entire script — all five sections that had already been written.
The failure message blamed a "prompt regression", which pointed nowhere near the actual cause.
The fix, and the lesson
The word is filler as a verb and a plain term of art as a noun. A business explainer that cannot say it cannot explain debt. So the verb forms stay banned and the noun is allowed.
The broader lesson is about where to put a rule. A style guide that cannot tell a verb from a noun will eventually block the correct word, and the more specialised your subject, the sooner that happens. When a model breaks the same rule in the same place three times, suspect the rule.