everything you need to know about YC's latest spring 2026 "request for startups" worth reading what YC wants YOU to build a business around: 1. cursor for product managers engineers already have ai writing code but now yc wants ai that decides what to build. you feed it customer calls and usage data, it spits out “build this next” plus tasks agents can ship. 2. ai-native hedge funds not humans using ai. ai is the fund. agents read filings, earnings, research, place trades, and invent…