Meta
We are working to build community through open source technology. NB: members must have two-factor auth.
Explained projects
React Compiler: The Repo That Turns UI Code Into a Language
Inside `facebook/react`, the next frontier is not rendering. It is compile-time analysis that infers reactivity, automates memoization, and treats components like code to be optimized, not just executed.
Docusaurus and the Art of the Surgical Eject
How Meta's pluggable engine turned static documentation into a high-performance React application without breaking the upgrade path.
Yet to be explained
rebalancer
Explain
Rebalancer is a domain-specific language and tool for specifying and solving assignment problems (eg, putting balls in boxes with complex rules).
meta-wearables-webapp
Explain
AI-assisted development toolkit for building web applications on Meta Ray-Ban Display glasses.
mcpguard-dynamic
Explain
Kernel-level eBPF sandbox for securing LLM agent tool calls made through the Model Context Protocol (MCP)
haptics-studio
Explain
Haptics Studio is our desktop application for designing haptics.
meta-ray-ban-display-ui-toolkit-web
Explain
UI Toolkit brings the Meta Ray-Ban Display design system to React. Use its components, semantic tokens, materials, motion, accessibility behavior, and directional focus navigation to build interfaces that stay consistent across applications.
agentic-tools
Explain
Agentic tools plugin and skills
rules_pyrefly
Explain
Bazel rules for running Pyrefly type checking over Python targets. Provides an aspect-based integration and Bzlmod toolchain extension for hermetic Pyrefly binary management.
meta-embeds-for-wordpress
Explain
Official WordPress plugin for embedding Threads, Instagram, and Facebook content. Simply paste a Threads, Instagram, or Facebook URL into the WordPress editor and get a rich embed. No access tokens or configuration required.
rocksdb-extensions
Explain
This is an extensions of the core RocksDB library to support various plug-ins and extensions of core functionality and other modular abstractions.
private_processing
Explain
Softwares that enables Meta Private Processing
clap_types
Explain
Generate multi-language strongly-typed client libraries around Rust CLIs.
mbt
Explain
Command-line tool for independently verifying the integrity of artifacts published to Meta's binary transparency log. Validates SHA-256 digests, Cloudflare Ed25519 signatures, Meta counter-signatures, and cross-checks against Cloudflare's Key Transparency auditor.
meta_glasses_webmcp
Explain
WebMCP on Meta display glasses enables developers to utilize Meta AI to create hands free and agentic interactions on web apps using user voice.
meta-encoder-eval
Explain
Evaluation for MetaEncoder https//huggingface.co/facebook/meta-encoder