How to Make Claude Code Your AI Engineering Team
Gary Tan, president of Y Combinator and experienced engineer, demonstrates how Claude Code can function as an AI engineering team through GStack, an open-source framework that structures AI agents with specialized skills and processes. Rather than letting AI models "wander," the key is architecting thin scaffolding and thick domain expertise so models produce reliable code at scale—a shift Tan claims lets builders accomplish in weeks what previously took teams of engineers months or years. [Claude Code, Conductor]
Key takeaways
- • The bottleneck in AI-assisted coding isn't model intelligence—it's proper setup and scaffolding; models like Opus are already capable of extraordinary work if given the right constraints, data context, and role-based structure.
- • Use office hours as the first step in any build: have the AI ask forcing questions ("What's the strongest evidence someone wants this?") to reframe your idea and business model before writing a single line of code, dramatically reducing wasted effort.
- • GStack provides 28+ specialized skills that mimic a real engineering team: office hours for planning, adversarial review for stress-testing ideas, design tools for visual brainstorming, and automated QA using browser automation—each compresses weeks of traditional work into hours.
- • Leverage browser automation (via Playwright and Chromium) to let AI agents interact with real web applications, log in, download documents, and perform complex interactions—capabilities that were impractical for AI just months ago and unlock novel solution approaches.
- • Run 10–15 parallel Claude Code sessions simultaneously across multiple projects and features; use a triage workflow (office hours → CEO review → design → code review → ship) to land 10–50 PRs per day and handle open-source contributions at scale.
- • Rotate between Opus 4.6 (the "ADHD CEO" for ideation and broad thinking) and Codex (the detail-oriented CTO) depending on the task; use Codex when "the going gets tough" to catch bugs and implement precise technical requirements.
Recommendations (7)
"I started playing with Claude Code back in January after hearing people like Andre Karpathy and Boris Churnney say they weren't manually writing any code anymore."
Y Combinator · ▶ 1:22
"I wrote a CLI around playwright and chromium. So there's actually an entire headed and headless browser in there."
Y Combinator · ▶ 17:26
Mentioned (5)
More from these creators
How To Build A Company With AI From The Ground Up
How Stripe Built Their New Website
The GPT Moment for Robotics Is Here
BillionToOne Is Solving One of Biotech’s Hardest Problems
François Chollet: Why Scaling Alone Isn’t Enough for AGI
Inside The Startup Reinventing America’s Trillion Dollar Chemical Industry