Meta Open Source

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Did you know that 63% of AI training models today are built on @PyTorch? When Meta first released the framework, we wanted to support developer experiences for AI researchers. Today, PyTorch helps accelerate the path to AI productization around the world: https://youtu.be/g__HkxDEvCg

Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. - YouTube

🚀 New Podcast Episode Alert!

Are you passionate about Python typing or developer experience? Check out the latest episode of @talkpython.fm featuring Pyrefly, Meta’s blazing-fast type checker for Python:
https://www.youtube.com/watch?v=P4RKxl_giH4&t=2s

Branching in a Sapling Monorepo Sapling is a scalable, user-friendly, and open-source source control system that powers Meta’s monorepo. As discussed at the GitMerge 2024 conference session on branching, designing and imple…

🚀 New on the Meta Engineering blog: Branching in a Sapling Monorepo

Discover how Meta solved the tradeoffs between scalability and dev experience by introducing directory branching alongside full-repo branching in Sapling.

Read more here: https://loom.ly/GgxCxto

Captum · Model Interpretability for PyTorch Model Interpretability for PyTorch

⚡️OSS Project Spotlight⚡️

Captum is an open source library from Meta for model interpretability in PyTorch. It helps developers understand and visualize the decisions made by deep learning models using attribution methods like Integrated Gradients and DeepLIFT.

Learn more: https://captum.ai/

Introducing the React Foundation: The New Home for React & React Native Meta open-sourced React over a decade ago to help developers build better user experiences. Since then, React has grown into one of the world’s most popular open source projects, powering over 50 m…

🚀 Big news! Today marks the formation of the React Foundation — a new home for React, React Native, JSX, and the broader React ecosystem.

Let’s celebrate a new chapter for React and the open web!

🔗 Read more: https://loom.ly/UrW8eeI

#React #OpenSource #WebDev #ReactNative

Introducing OpenZL: An Open Source Format-Aware Compression Framework Introducing OpenZL: An Open Source Format-Aware Compression Framework

🚀 Introducing OpenZL, a new #opensource, format-aware compression framework!

It uses a unique “graph model” for compression, enabling modular, high-performance codecs and a universal decoder - perfect for structured data at scale

Link: https://loom.ly/z09xoNw

#DataCompression

Give your Python IDE a Glow-Up with Pyrefly | Pyrefly Learn how Pyrefly's language server capabilities can help you navigate large Python codebases with ease.

How do you make sure your IDE works smoothly when you have more than 20 million lines of python code? 🤔

For devs at Instagram the answer is to use the Pyrefly VSCode extension 👩🏼‍💻

Read our blog about how Pyrefly improves your experience: https://pyrefly.org/blog/2025/09/15/ide-extension/

🔎 Meta Open Source 101🔎

Meet Sapling, Meta’s next-gen source-control system. It’s Git-compatible but designed for massive repos and lightning-fast operations, even at scale. Perfect if you need speed and a smooth developer experience.

Learn more 👉 https://sapling-scm.com