YC CEO Garry Tan says he wrote 600,000 lines of production code in the past 60 days, 10,000-20,000 lines per day (35% are tests), while managing the company!

He open-sourced his secret! The tool is called gstack, free on GitHub (MIT license).

The core idea is brilliantly simple—treat AI as a complete team. He created 15 "virtual employees" using Claude Code, all written as Markdown slash commands 👍

For example:
- /office-hours: helps you clarify fuzzy requirements first;
- /review: like a senior engineer reviewing code, catches bugs that pass CI but crash production;
- /qa: opens real browsers, simulates user operations, finds bugs → auto-fixes → writes regression tests → verifies again.

The biggest breakthrough is /qa, which let him easily scale from 6 parallel AIs to 12+. With clear processes (think → plan → develop → review → test → deploy), each AI knows the previous step, and 10-15 features can run simultaneously without chaos.

He believes the definition of "team" will change in the future!

✅ I'm planning to try the above approach. My vibe coding website is almost done too, but I clearly feel there's significant friction between me and Claude. Currently I have two Pros ➕ plus three free accounts, been working on this for two weeks 💪