We want to see how you build with AI. To better capture that, we've added a new application question for the Spring 2026 batch: The application demo has always been key but now, when you apply to YC, you can upload a markdown file or transcript from Claude Code (or your favorite coding tool). We want to see how you plan, design, debug, and ship your most important features. Apply by Feb 9: https://ycombinator.com/apply