Garry Tan was employee number 10 at Palantir, where he served as an engineer, designer, and product manager.

Garry Tan co-founded the microblogging platform Posturus, which was later acquired by Twitter.

Garry Tan finds that when using the G-Stack "Office Hours" feature for idea validation, he decides an idea is not worth pursuing in approximately one out of every three sessions.

Flock Safety's initial product was a solar-powered camera with an embedded Raspberry Pi that ran computer vision models at the edge to identify vehicles.

Flock Safety's technology is now used to solve 10% of all reported crime in the United States.

The initial addressable market for Flock Safety was estimated to be only $50 to $60 million per year, based on its early strategy of selling to neighborhood associations.

Flock Safety's growth was significantly accelerated by a pivot in its go-to-market strategy from selling to neighborhood groups to selling directly to police departments and city governments.

Garry Tan asserts that the software industry has entered a new "agent era."

Garry Tan describes "Claude in Chrome MCP" as one of the worst pieces of software he has ever used due to slow performance and context bloat.

Using his G-Stack workflow, Garry Tan claims he can process between 10 and 50 pull requests in a single day.

The original version of the startup Posturus required two years, $10 million in funding, and a team of 10 engineers to build.

In a demonstration, G-Stack's adversarial review feature automatically identified and fixed 16 issues in a design document, improving its quality score from 6/10 to 8/10.

Garry Tan built the first version of Bookface, Y Combinator's internal social platform and knowledge base.

Garry Tan's personal workflow involves running 10 to 15 parallel Claude Code sessions at the same time.

Garry Tan was inspired to start using Claude Code after hearing Andre Karpathy and Boris Cherny state they no longer write code manually.

Garry Tan characterizes the default Claude model (Opus 4.6) as an "ADHD CEO" for idea generation and OpenAI's Codex as an "autistic CTO" for detail-oriented tasks.

The "Office Hours" skill in G-Stack is modeled on the process Y Combinator partners use with startups and asks six initial questions to reframe a product idea.

Garry Tan created a command-line interface for G-Stack that wraps Playwright and Chromium to enable AI agents to perform automated QA in a browser.

According to Garry Tan, some users of G-Stack spend 80% to 90% of their time in the "Office Hours," "Plan CEO Review," and "Auto Plan" features.

Within three weeks of its creation, Garry Tan's GStack project surpassed the number of GitHub stars of the Ruby on Rails framework.