Open Source OCaml (Objective Caml) Code Review Software

Flow is a static type checker for JavaScript. It was designed to help improve code quality and developer productivity. It does this through several smart capabilities. First, it identifies problems as you code, so you no longer have to waste time guessing and checking again and again. Second, it understands your code and makes its knowledge available, allowing you to build other smart tools on top of it. Third, it helps you refactor safely so you can focus on the changes you want to make and not on what you might break. Lastly, it can help prevent bad rebases and protect your carefully designed library, which is especially relevant when working with a large group of developers. Flow integrates with many tools, so you can easily and seamlessly insert it into your existing workflow and toolchain.

Built from the ground up to support gradual typing and deliver responsive incremental checks. Performant on large codebases with millions of lines of Python. Designed to help improve code quality and development speed by flagging type errors interactively in your terminal or live in your favorite editor. Follows the typing standards introduced in PEPs 484, 526, 612, and is being actively developed and constantly improved. Pyre ships with Pysa, a security focused static analysis tool we've built to reason about data flows in Python applications at scale. Pyre is a performant type checker for Python compliant with PEP 484. Pyre can analyze codebases with millions of lines of code incrementally, providing instantaneous feedback to developers as they write code. Pyre ships with Pysa, a security focused static analysis tool we've built on top of Pyre that reasons about data flows in Python applications. Please refer to our documentation to get started with our security analysis.