three distinct stages, and it helps to name them separately because each one is a different prompt:
Thesis extraction — the LLM reads the corpus and proposes candidate theses (not one; three or four, so you're choosing rather than accepting). You pick.
Evidence marshaling — every claim, stat, quote, and example from the sources gets sorted under the thesis it supports. Anything that contradicts it goes in a counter-evidence pile rather than getting quietly dropped.
The shell — the classic Roman-numeral outline (I / A / 1 / a), rendered one section per page, heading and its evidence at the top, rest of the page blank.
That last artifact is the interesting one, and journalism already has a word for it: a shell. Newsrooms build shells before an event breaks — structure and background in place, blank where the reporting will go. Yours is the same idea for essays. If you want the whole pipeline named, shell brief or draft shell both work and stay accurate about the fact that voice is deliberately absent.
Two things worth deciding before you build it: whether the evidence under each heading appears as full quotes or as compressed pointers back to the source, and how much blank space each section gets — because the amount of space you leave is itself an instruction about how long that section should