What's inside langchain-ai/langchain

More on this repo

TechnologiesWhat is langchain built with?langchain is built with AIOHTTP and uses OpenAI.+7Who writes itHow much of langchain did AI write?0.3%AI signed 0.3% of the 17,017 commits of langchain.

In figures

lines written

426,036

The ones people and agents wrote: product, tests, schemas and tooling. Generated code doesn’t count.

files

1,654

The product’s, not counting tests.

test files

895

The files that test the code.

technologies

15

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.

Frequently asked questions

What is langchain-ai/langchain?

langchain-ai/langchain is a Python repo with 426,036 lines written in 1,654 files. Its description on GitHub: “The agent engineering platform.”

The proof: its page on GitHub

What is langchain built with?

langchain is built with AIOHTTP and uses OpenAI.

The proof: each service with its file and line

How much of langchain did AI write?

AI signed 0.3% of the 17,017 commits of langchain.

The proof: the commits each tool signed

What license does langchain have?

langchain is released under the MIT license.

The proof: its page on GitHub

How many stars does langchain have on GitHub?

langchain had 148,995 stars on GitHub on November 4, 2026.

The proof: its page on GitHub