Fauna Sprout: A lightweight, approachable, developer-ready humanoid robot. - Diego Aldarondo; Ana Pervan; Daniel Corbalan; Dave Petrillo; Bolun Dai; Aadhithya Iyer; Nina Mortensen; Erik Pearson; Sridhar Pandian Arunachalam; Emma Reznick; David Weis; Jacob Davison; et al. (CoRR, 2026)