Open source repo
What's inside vercel/
vercel/next.js is a JavaScript repo with 2,391,614 lines written in 5,697 files. next.js is built with React, Express, Tokio, and 3 more. AI signed 0.8% of the 36,392 commits of next.js.
Its description on GitHub: “The React Framework”
Read on November 4, 2026, at commit 97f1a2c.
What the card proved: what it’s built with on the left, what it uses on the right.
See each one with its proofIn figures
- lines written
- 2,391,614
- The ones people and agents wrote: product, tests, schemas and tooling. Generated code doesn’t count.
- files
- 5,697
- The product’s, not counting tests.
- test files
- 18,587
- The files that test the code.
SeeRepo read the facts in its code and kept none of it. AI only helps sort its packages and folders by their names, and never sees its code.
Frequently asked questions
What is vercel/next.js?
The proof: its page on GitHub
What is next.js built with?
The proof: each service with its file and line
How much of next.js did AI write?
The proof: the commits each tool signed
What license does next.js have?
The proof: its page on GitHub
How many stars does next.js have on GitHub?
The proof: its page on GitHub
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