Returnee is a solo competitive hackathon team focused on pushing the frontier of autonomous AI agents and quantitative finance. Returning as a seasoned builder to the Alpaca AI Trading Agents Hackathon, Returnee combines production-grade financial engineering with open-source frontier LLMs (Qwen-2.5-72B via Featherless AI) and Alpaca's institutional FastMCP tool architecture to solve the safety and execution challenges of autonomous options trading.