Definition
What the Llama thesis checker examines
One pasted section, read for two things at once. At the level of argument: whether a central claim is present and specific, whether the supporting paragraphs bear on it, whether the closing lands where the opening pointed. At the level of surface: sentence length distribution, recurring constructions, hedging density, the register the vocabulary sits in.
The result is written at a low temperature with a ceiling of 1,400 completion tokens, so it arrives as a short report rather than an annotated document. Every finding in it should be locatable in the passage you submitted. Anything you cannot find there should be discarded, and that test is the correct way to use a reading of this kind.