Source: https://seerepo.com/r/openai/codex
Markdown source: https://seerepo.com/r/openai/codex.md
Description: openai/codex is a Rust repo with 2,310,690 lines written in 4,202 files. codex is built with axum and uses SQLite and Sentry.

# What's inside openai/codex

openai/codex is a Rust repo with 2,310,690 lines written in 4,202 files. codex is built with axum and uses SQLite and Sentry. AI signed 2.8% of the 13,064 commits of codex.

Its description on GitHub: “Lightweight coding agent that runs in your terminal”

Rust · Apache-2.0 · 133,007 stars · GitHub: https://github.com/openai/codex

Read on November 3, 2026, at commit f1b0721.

## More on this repo

- [What is codex built with?](https://seerepo.com/r/openai/codex/built): codex is built with axum and uses SQLite and Sentry.
- [How much of codex did AI write?](https://seerepo.com/r/openai/codex/ai): AI signed 2.8% of the 13,064 commits of codex.

## In figures

- 2,310,690 lines written: The ones people and agents wrote: product, tests, schemas and tooling. Generated code doesn’t count.
- 4,202 files: The product’s, not counting tests.
- 2,441 test files: The files that test the code.
- 3 technologies: 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 openai/codex?

openai/codex is a Rust repo with 2,310,690 lines written in 4,202 files. Its description on GitHub: “Lightweight coding agent that runs in your terminal”

The proof: [its page on GitHub](https://github.com/openai/codex)

### What is codex built with?

codex is built with axum and uses SQLite and Sentry.

The proof: [each service with its file and line](https://seerepo.com/r/openai/codex/built)

### How much of codex did AI write?

AI signed 2.8% of the 13,064 commits of codex.

The proof: [the commits each tool signed](https://seerepo.com/r/openai/codex/ai)

### What license does codex have?

codex is released under the Apache-2.0 license.

The proof: [its page on GitHub](https://github.com/openai/codex)

### How many stars does codex have on GitHub?

codex had 133,007 stars on GitHub on November 3, 2026.

The proof: [its page on GitHub](https://github.com/openai/codex)

## Add this badge to your README

It links to this page and updates itself each time SeeRepo reads the repo.

```markdown
[![openai/codex on SeeRepo](https://seerepo.com/badge/openai/codex.svg)](https://seerepo.com/r/openai/codex?de=insignia)
```

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.