Class libraries for XHP. XHP is a Hack feature that augments the syntax of the language such that XML document fragments become valid Hack expressions.

Library to programatically generate Hack code and write it to signed files

A modular Hack framework that runs on HHVM.

Scripts for benchmarking various PHP implementations when running open source software.

A miniKanren in PHP.

Mutable AST library for Hack with linting and code migrations

Request routing for HackLang

Autoload classes, functions, enums, constants, and typedefs on HHVM

A unit testing framework for Hack

Find definitions (classes, functions, etc) in PHP and Hack files

Disable HHVM's automatic calls to the Hack typechecker