Tianyi Ma Ph.D. student @ Michigan State University · Multimodal reasoning & interactive agents I study multimodal reasoning for agents that operate in interactive worlds. Selected research SkillNav — First-author work on composing vision-and-language navigation skills with a VLM router. ACL 2026 Oral · paper · code SaaS-Bench — A benchmark for computer-use agents on professional SaaS workflows. Preprint 2026 · paper · code Homepage · Google Scholar · LinkedIn