Disk eccentricity at t = 8 kyr for models with an infall rate of ﹩{\dot{M}}_{{\rm{in}}}=1{0}^{-6}\,{M}_{\odot }\,{{\rm{yr}}}^{-1}﹩, comparing the prograde-streamer (green) and retrograde-streamer (brown) cases. In the retrograde-streamer model, the eccentricity profile exhibits a pronounced transition near R ≈ 100 au, separating a weakly eccentric inner disk from a highly eccentric outer component.