Source: https://seerepo.com/r/harvard-edge/cs249r_book
Markdown source: https://seerepo.com/r/harvard-edge/cs249r_book.md
Description: harvard-edge/cs249r_book is a Python repo with 821,581 lines written. cs249r_book is built with anyio, jupyter-core, jupyterlab-server, and 4 more.

# What's inside harvard-edge/cs249r_book

harvard-edge/cs249r_book is a Python repo with 821,581 lines written. cs249r_book is built with anyio, jupyter-core, jupyterlab-server, and 4 more. AI signed 2.7% of the 22,351 commits of cs249r_book.

Its description on GitHub: “Machine Learning Systems: Foundations, Scaling, Agentic AI, and Physical AI (Vols I–IV) • Harvard CS249r | https://mlsysbook.ai”

Python · 30,011 stars · GitHub: https://github.com/harvard-edge/cs249r_book

Read on November 8, 2026, at commit de87c01.

## More on this repo

- [What is cs249r_book built with?](https://seerepo.com/r/harvard-edge/cs249r_book/built): cs249r_book is built with anyio, jupyter-core, jupyterlab-server, and 4 more.
- [How much of cs249r_book did AI write?](https://seerepo.com/r/harvard-edge/cs249r_book/ai): AI signed 2.7% of the 22,351 commits of cs249r_book.

## In figures

- 821,581 lines written: The ones people and agents wrote: product, tests, schemas and tooling. Generated code doesn’t count.
- 1,977 source files: The same as the lines: product, tests, schemas and tooling. What’s generated doesn’t count.
- 629 test files: The files that test the code.
- 92 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 harvard-edge/cs249r_book?

harvard-edge/cs249r_book is a Python repo with 821,581 lines written. Its description on GitHub: “Machine Learning Systems: Foundations, Scaling, Agentic AI, and Physical AI (Vols I–IV) • Harvard CS249r | https://mlsysbook.ai”

The proof: [its page on GitHub](https://github.com/harvard-edge/cs249r_book)

### What is cs249r_book built with?

cs249r_book is built with anyio, jupyter-core, jupyterlab-server, and 4 more.

The proof: [each service with its file and line](https://seerepo.com/r/harvard-edge/cs249r_book/built)

### How much of cs249r_book did AI write?

AI signed 2.7% of the 22,351 commits of cs249r_book.

The proof: [the commits each tool signed](https://seerepo.com/r/harvard-edge/cs249r_book/ai)

### How many stars does cs249r_book have on GitHub?

cs249r_book had 30,011 stars on GitHub on November 8, 2026.

The proof: [its page on GitHub](https://github.com/harvard-edge/cs249r_book)

## Add this badge to your README

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

```markdown
[![harvard-edge/cs249r_book on SeeRepo](https://seerepo.com/badge/harvard-edge/cs249r_book.svg)](https://seerepo.com/r/harvard-edge/cs249r_book?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.