Skill libraries stop only growing: SkillForge retires and rewrites skills as the policy evolves, lifting WebShop success by 7.8% relative
SkillForge turns an agent's skill library from an append-only store into a fitness-driven lifecycle of trial, active, stable, and retired states, so skills and policy co-evolve during reinforcement learning and reach the highest aggregate success rate across ALFWorld, WebShop, and Search-Augmented QA, up to 7.8% relative over the strongest baseline.