Physical Address
304 North Cardinal St.
Dorchester Center, MA 02124
The famous CEO of Y Combinator Garry Tan told a SXSW audience that he has “cyber psychosis” and does not sleep because he is excited to work with AI agents.
“I sleep, like, four hours a night right now,” he told his interviewer, fellow VC Bill Gurley, during an interview on Saturday. “I have cyber psychosis, but I think a third of the CEOs I know have it too,” he joked about his interest in AI. (At least, we hope it was a joke. AI-induced psychosis it can be a dangerous situation.)
“If you try, you will realize: It’s like I was able to rebuild my startup that took $10 million in VC capital with 10 people, and I worked for two years, and I took anti-narcoleptics – I remember, you know, being on modafinil,” he explained, meaning anti-sleep medication that is popular among people who have developed a lot of culture. (Tan sold his Y Combinator-backed blog He returned to Twitter in 2012.)
But now, his psyche has grown to work with AI assistants, and natural sleep.
“I don’t need modafinil with this change. Like, I woke up. I went to bed at 4 and woke up at 8,” he said. “I wanted to sleep a lot, but I failed because: Let’s see what is happening with those 10 workers.
He is so happy with his supporters that on March 12, just two days before the interview, he freely shared his implementation of Claude Code (CC) on GitHub under an open source license. The arrangement included six of the Claude Code skills he created. Skills are reusable information stored in special “skill.md” files that instruct the AI ​​how to perform certain roles or tasks.
“I had such an amazing time with Claude Code, I wanted you to experience my true creativity,” he said. written on X. He called his implementation of Claude Code “gstack.”
Techcrunch event
San Francisco, CA
| |
October 13-15, 2026
Since then he has added several other skills. The gstack GitHub site currently lists 13, but it seems like every hour Tweets about something new.
In another post, he gave an example of how his setup works. First, they get Claude’s ideas as a startup idea or part is a good idea to use the skills that Claude does as a CEO. He uses one skill for Claude to write the feature as an engineer, and another to review his work on security issues and problems as a code reviewer. Other skills cover design, writing, and so on.
The love for gstack started immediately: his tweet went viral on X and continued Product Hunt. It has collected almost 20,000 stars on GitHub with 2,200 “forks”, meaning people who have taken the files to modify themselves.
But soon after releasing gstack, Tan also sent a tweet that drew a lot of hate.
He wrote that his CTO colleague told him that gstack was a “god” that immediately discovered a security flaw in his company and predicted that it would be widely used.
To quote just a few of the many haters who followed: One founder was sent to X: “(1) Garry should be ashamed of himself for writing this. (2) If true, the CTO should be fired immediately.
Vlogger Mo Bitar took action on the gstack call “AI is creating corrupt CEOs” in which he said that the work was “motivated” in the file. The vlogger summed up a common complaint: Developers using Claude Code already have their own versions of this.
He added one person Product Hunt“Garry, let’s be clear and honest: if you weren’t the CEO of YC, this wouldn’t be at PH.”
So who is right? Is gstack the most efficient way to work with Claude Code? Or not surprising? To find out, I asked experts, including Claude (who, not surprisingly, loved it). I also consulted ChatGPT and Gemini, both of which were surprisingly good.
Gstack is a group of “fast-paced, but not ‘magical,'” ChatGPT decided. “The real message here is that AI coding works best when you model it in engineering. Not when you just ask: ‘Make this.’
Gemini called the setup “very complex,” adding that “gstack is essentially a ‘Pro’ configuration. It’s easy to make code simpler and more manageable.”
Claude called gstack “a mature, no-nonsense system made by someone who uses it a lot,” and added, “It’s one of the best examples of Claude Code’s creativity out there.”
We’ll take this as a thumbs up from an expert on the subject.
On Monday, Tan made another statement X post“I took modafinil to stay awake longer so that I could turn the short-term crystalline structures I had in my brain into lines of code before I fell asleep or human distraction turned it into sand. I like to copy but I like to write with AI more. I talk and listen and we create. I see the structure and the structure. There is no more powerful experience for me than that.”
Tan did not respond to several requests for comment.
