Open source repo

What's inside nextauthjs/next-auth

nextauthjs/next-auth is a TypeScript repo with 55,839 lines written in 363 files. next-auth uses MongoDB, Postgres, Supabase, and Firebase. AI signed 0.1% of the 3,882 commits of next-auth.

Its description on GitHub: “Authentication for the Web.”

TypeScriptISC28,376

Read on November 2, 2026, at commit a1a16a5.

What the card proved: what it’s built with on the left, what it uses on the right.

See each one with its proof

More on this repo

TechnologiesWhat is next-auth built with?next-auth uses MongoDB, Postgres, Supabase, and Firebase.Who writes itHow much of next-auth did AI write?0.1%AI signed 0.1% of the 3,882 commits of next-auth.

In figures

lines written: 55,839; The ones people and agents wrote: product, tests, schemas and tooling. Generated code doesn’t count.
files: 363; The product’s, not counting tests.
test files: 96; The files that test the code.
technologies: 4; Each service with the file and line that prove it.

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.