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Abstract The astrophysical origin of the lanthanides is an open question in nuclear astrophysics. Besides the widely studieds,i, andrprocesses in moderately to strongly neutron-rich environments, an intriguing alternative site for lanthanide production could in fact be robustlyproton-richmatter outflows from core-collapse supernovae under specific conditions—in particular, high-entropy winds with enhanced neutrino luminosity and fast dynamical timescales. In this environment, excess protons present after charged-particle reactions have ceased can continue to be converted to neutrons by (anti)neutrino interactions, producing a neutron-capture reaction flow up toA ∼ 200. This scenario, christened theνiprocess in a recent paper, has previously been discussed as a possibility. Here, we examine the prospects for theνiprocess through the lenses of stellar abundance patterns, bolometric light curves, and galactic chemical evolution models, with a particular focus on hypernovae as candidate sites. We identify specific lanthanide signatures for which theνiprocess can provide a credible supplement to ther/iprocesses.