The Xero App & Agent Hackathon lands in London on 4 and 5 July: two days, £9,000 in prizes, and one mission, to build AI-powered apps and agents that do not just look good in a demo but actually work in the real world. Once the building stops, the pitching starts. With that much on the line, you will have three minutes in front of the judges to turn everything you made into a story they believe in.