We're excited to announce the release of Zulip Server 1.6.0, containing hundreds of new features and bug fixes.

Over the last few years, static type checkers have become available for popular dynamic languages like PHP (Hack) and JavaScript (Flow and TypeScript), and have seen wide adoption. Two years ago, a provisional syntax for static type annotations was added to Python 3. However, static types in Python have yet to be widely adopted, because the tool for checking the type annotations, mypy, was not ready for production use… until now!