How the YC CEO Shipped 600K Lines Solo — gstack and the Reality of a One-Person AI Team
How the YC CEO Shipped 600K Lines Solo — gstack and the Reality of a One-Person AI Team In early 2026, Garry Tan pushed something to GitHub. The CEO of Y Combinator open-sourced his personal Claude Code setup. He called it gstack . A number came with it. 60 days. 600,000 lines. Production code he wrote alone over two months using this setup. Up to 10,000–20,000 lines a day. No team. The reaction split in two directions. "Can that possibly be real?" Or: "What if it is?" Both are the right response. And the truth about what gstack actually is sits somewhere in that tension. How This Series Got Here This is Part 3 of the Paperclip Series. Part 1 was about what happens when AI follows a goal too faithfully. I told Claude Code to "reduce the bundle size" and came back to a diff that had ripped out polyfills and swapped lodash-es for lodash — bundle was down, Safari was dead. That led to Nick Bostrom's Paperclip Maximizer: the real AI risk isn't ...