Source: https://seerepo.com/r/MetaMask/metamask-extension
Markdown source: https://seerepo.com/r/MetaMask/metamask-extension.md
Description: MetaMask/metamask-extension is a TypeScript repo with 1,537,435 lines written. AI signed 3.8% of the 29,106 commits of metamask-extension.

# What's inside MetaMask/metamask-extension

MetaMask/metamask-extension is a TypeScript repo with 1,537,435 lines written. metamask-extension is built with React, react-router-dom, and Koa and uses GitHub and Sentry. AI signed 3.8% of the 29,106 commits of metamask-extension.

Its description on GitHub: “:globe_with_meridians: :electric_plug: The MetaMask browser extension enables browsing Ethereum blockchain enabled websites”

TypeScript · 13,252 stars · GitHub: https://github.com/MetaMask/metamask-extension

Read on November 10, 2026, at commit 854e9e7.

## More on this repo

- [What is metamask-extension built with?](https://seerepo.com/r/MetaMask/metamask-extension/built): metamask-extension is built with React, react-router-dom, and Koa and uses GitHub and Sentry.
- [How much of metamask-extension did AI write?](https://seerepo.com/r/MetaMask/metamask-extension/ai): AI signed 3.8% of the 29,106 commits of metamask-extension.

## In figures

- 1,537,435 lines written: The ones people and agents wrote: product, tests, schemas and tooling. Generated code doesn’t count.
- 4,002 source files: The same as the lines: product, tests, schemas and tooling. What’s generated doesn’t count.
- 3,172 test files: The files that test the code.
- 37 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 MetaMask/metamask-extension?

MetaMask/metamask-extension is a TypeScript repo with 1,537,435 lines written. Its description on GitHub: “:globe_with_meridians: :electric_plug: The MetaMask browser extension enables browsing Ethereum blockchain enabled websites”

The proof: [its page on GitHub](https://github.com/MetaMask/metamask-extension)

### What is metamask-extension built with?

metamask-extension is built with React, react-router-dom, and Koa and uses GitHub and Sentry.

The proof: [each service with its file and line](https://seerepo.com/r/MetaMask/metamask-extension/built)

### How much of metamask-extension did AI write?

AI signed 3.8% of the 29,106 commits of metamask-extension.

The proof: [the commits each tool signed](https://seerepo.com/r/MetaMask/metamask-extension/ai)

### How many stars does metamask-extension have on GitHub?

metamask-extension had 13,252 stars on GitHub on November 10, 2026.

The proof: [its page on GitHub](https://github.com/MetaMask/metamask-extension)

## Add this badge to your README

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

```markdown
[![MetaMask/metamask-extension on SeeRepo](https://seerepo.com/badge/MetaMask/metamask-extension.svg)](https://seerepo.com/r/MetaMask/metamask-extension?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.