Centered on SenseTime Raccoon's Skill and Expert-Team capabilities, this talk explores a new paradigm for large-model applications: moving from "tool calling" to "capability building." It focuses on how developers can turn domain expertise, complex processes, and scenario experience into reusable, composable, iterable AI capability units, and how the expert-team mechanism enables multi-role collaboration and task orchestration. Drawing on real-world practice, it looks at how developers build intelligent workflows for individuals, teams, and industries on top of Raccoon — pushing AI capability from isolated efficiency gains toward a sustainably scalable productivity infrastructure.