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Fatal is a library for fast prototyping software in modern C++. It provides facilities to enhance the expressive power of C++. The library is heavily based on template meta-programming, while keeping the complexity under-the-hood.

SPARTA is a library of software components specially designed for building high-performance static analyzers based on the theory of Abstract Interpretation.

The Grocery Delivery utility for managing cookbook uploads to distributed Chef backends.

A library to provide calculations between Chef diffs.

Javascript implementation of the Ristretto255 group operations, built on top of the popular TweetNaCl.js crypto library

This is an extensions of the core RocksDB library to support various plug-ins and extensions of core functionality and other modular abstractions.

Wangle is a framework providing a set of common client/server abstractions for building services in a consistent, modular, and composable way.

A novel data compression framework

OpenBMC is an open software framework to build a complete Linux image for a Board Management Controller (BMC).

Lexical iOS is an extensible text editor framework that integrates the APIs and philosophies from Lexical Web with a Swift API built on top of TextKit.

WebXR made simple. Full-featured framework with interactions, locomotion, and spatial UI. Powered by Three.js.

eBPF-based packet filtering framework

A Python test framework

TAAC (Test-As-A-Config) is a thrift-defined integration test framework for validating datacenter network products and platforms.

An implementation of the QUIC transport protocol.

Pluggable in-process caching engine to build and scale high performance services

Trust & Safety tools for working together to fight digital harms.

Facebook Open Switching System Software for controlling network switches.

Transform360 is an equirectangular to cubemap transform for 360 video.

Distributed platform for building autonomic network functions.

Python wrapper for RE2

The facebook sdk for unity.

SQuangLe is a C++ API for accessing MySQL servers

fb303 is a core set of thrift functions that provide a common mechanism for querying stats and other information from a service.

Rebalancer is a domain-specific language and tool for specifying and solving assignment problems (eg, putting balls in boxes with complex rules).

Meta's BGP (Border Gateway Protocol) routing daemon for large-scale data center networks, built as part of the FBOSS forwarding stack.

iOS library to help detecting retain cycles in runtime.

Native code loader for Android

An Android library that allows you to build text layouts more easily.

A security focused static analysis tool for Android and Java applications.

Meta Wearables Device Access Toolkit for iOS

Meta Wearables Device Access Toolkit for Android

A STARK prover and verifier for arbitrary computations

Simplified executable deployment

An implementation of the OPAQUE password-authenticated key exchange protocol

An implementation of an auditable key directory

Sets of libraries and tools to write applications and libraries mixing OCaml and Rust. These libraries will help keeping your types and data structures synchronized, and enable seamless exchange between OCaml and Rust

An implementation of a verifiable oblivious pseudorandom function (RFC 9497)

An implementation of Oblivious RAM

A low-level haptic rendering and data processing library based on a universal format.

An implementation of a SAS-based authenticated key exchange

An implementation of a PAKE based on a KEM

Generate multi-language strongly-typed client libraries around Rust CLIs.

This repo contains the QEMU that simulates hardware for the fbnic driver

Softwares that enables Meta Private Processing

StyleX is the styling system for ambitious user interfaces.

idb is a flexible command line interface for automating iOS simulators and devices

PathPicker accepts a wide range of input -- output from git commands, grep results, searches -- pretty much anything. After parsing the input, PathPicker presents you with a nice UI to select which files you're interested in. After that you can open them in your favorite editor or execute arbitrary commands.

Language, engine, and tooling for expressing, testing, and evaluating composable language rules on input strings.

Warp speed Data Transfer (WDT) is an embeddedable library (and command line tool) aiming to transfer data between 2 systems as fast as possible over multiple TCP paths.

Adaptive Experimentation Platform

Python SDK for Meta Marketing APIs

PHP SDK for Meta Marketing API

dhcplb is Facebook's implementation of a load balancer for DHCP.

Node.js SDK for Meta Marketing APIs

The OpenStreetMap editor driven by open data, AI, and supercharged features

Meta's Time libraries

Open source chef cookbooks.

Java SDK for Meta Marketing APIs

Meta's Client Platform Engineering tools. Some of the tools we have written to help manage our fleet of client systems.

Facebook AI Performance Evaluation Platform

The official plugin from Meta. This repository is now officially owned by Meta's Partner Engineering team. We welcome and encourage contributions from the community.

Utilities related to Chef

Ruby SDK for Meta Marketing API

Collection of Meta's DNS Libraries

OS X Homebrew formulas to install Meta open source software

Safe, minimal import sorting for Python projects.

Welcome to the Meta Threat Research Indicator Repository, a dedicated resource for the sharing of Indicators of Compromise (IOCs) and other threat indicators with the external research community

This repository provides OpenAPI specifications for Meta APIs

Software to manage a chef-zero instance and use it to test changes on production servers.

Post Processor for Facebook Static Analysis Tools.

bunnylol is a tool for writing smart bookmarks. Use in your browser, or on the command-line

Codegen project for our business SDKs

Prelude for the Buck2 project

Lifeguard is a static analyzer to detect Lazy Imports incompatibilities and ease the adoption overhead for Lazy Imports in Python

Facebook Pixel - Custom Tag Template for Google Tag Manager.

This project enabled intercepting and virtualizing the browser API

Haptics Studio is our desktop application for designing haptics.

Conversions API parameter builder to help enhance the parameter qualities for Conversions API events

Tracking Denx Das u-boot with various trusted computing add-ons.

GitHub Action for Pyre

Security-focused Python Static Analyzer

Setup Conversion Leads API integration using Salesforce APEX triggers on Lead objects

Bookworm is a program that gleans context from a Chef/Ruby codebase leveraging RuboCop AST pattern matching

An experimental first-stage model used for quick and efficient inference on part of the data.

Create DotSlash files for GitHub releases

Set of scripts to help building OCaml projects using buck2.

A simple GitHub Action to install a precompiled dotslash binary

Shims to convert Meta internal buck2 macros/targets for open source build compatibility.

This repo contains the Protocol Buffer schemas used for Meta's end-to-end encryption (E2EE) backend storage Encrypted Backups (EB). This can be used to deserialize the decrypted plaintext of the messaging data (or to serialize data).

This new SDK supports the Instant Games SDK v8.0, ensuring access to the latest features and APIs for Instant Games. We also provide code snippets through the sample scene, and templates for OverlayViews.

Set of filters and preferences that can be applied to content viewed in a content review tool.

Bazel rules for running Pyrefly type checking over Python targets. Provides an aspect-based integration and Bzlmod toolchain extension for hermetic Pyrefly binary management.

Follow the README to run this mock firmware with the upstream fbnic driver, so it can respond to any messages the driver sends during development or testing.

Agentic tools plugin and skills

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.

Meta Audience Network allows you to monetize your iOS and Android apps with Facebook ads

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.