Survival is the Only Reward: Sustainable Self-Training Through Environment-Mediated Selection. - Jennifer Dodgson; Alfath Daryl Alhajir; Michael Joedhitya; Akira Rafhael Janson Pattirane; Surender Suresh Kumar; Joseph Lim; C. H. Peh; Adith Ramdas; Steven Zhang Zhexu (CoRR, 2026)