The most catastrophic scenario for such planet migration, dubbed the Nice model (after the French city), has been gaining ground of late. (science.sciencemag.org)
The giant planet migration shook up the asteroid belt, removing many bodies, possibly including the parent of this family.» (sciencedaily.com)
After planet migration stops, it gradually carves open a gap in the disk, and lowers its gas accretion rate to prevent runaway accretion. (eos-nexus.org)