I started building Tell for the All Things Agentic Hackathon because I wanted to study poker and get better. Most poker tools give you the answer, but don't help you understand how to think through the decision. Tell works like a study partner. Paste in a hand, explain what you were thinking, and Tell guides you through the decision before revealing the math. It also tracks recurring leaks across your hands, so you can see the patterns holding your game back.