Type-I irreducible ancient Ricci flow solutions are Ricci shrinkers

Let $(M^n,g(t))_{t \in (-\infty,0]}$ be a $\kappa$-noncollapsed ancient solution to the Ricci flow that is Type-I, irreducible, and complete.

Type-I ancient-solution conjecture. $(M^n,g(t))$ is isometric to a Ricci shrinker, up to scaling.

The paper proposes this conjecture in the context of classifying ancient solutions to the Ricci flow; its Kähler analogue proved in the paper is presented as a special case. No resolution is given here, so the conjecture remains open.