Before you pay a deposit, does your event plan actually work? The venue rules are on a website. The supplier’s timings are in an email. Your schedule is somewhere else. Each can look fine until you put them together. I built Gather to check them together. In this demo, setup finishes after guests arrive, and equipment pickup runs past the venue’s cutoff. Gather catches both clashes. I send a clarification to the supplier, receive a reply, and review the proposed changes before accepting them. Two timing clashes become zero. Every accepted change stays linked to its source, and the earlier plan remains available. clever-boar-260.convex.site github.com/Pavilion-devs/gat… Built for the All Gas Hackathon with: • @convex — saved evidence, live updates, plan history and hosting. • @firecrawl — reads public venue pages. • @OpenAI — extracts proposed facts with supporting quotations. • @agentmail — sends approved emails and brings replies into the review process. The video shows the full workflow, using real integrations and an illustrative event.