Clojure 1.9 is now available

Clojure 1.9 is now available!

Clojure 1.9 introduces two major new features: integration with spec and command line tools.

spec (rationale, guide) is a library for describing the structure of data and functions with support for:

Clojure integrates spec via two new libraries (still in alpha):

This modularization facilitates refinement of spec separate from the Clojure release cycle.

The command line tools (getting started, guide, reference) provide:

The installer is available for Mac developers in brew, for Linux users in a script, and for more platforms in the future.

For more information, see the complete list of all changes in Clojure 1.9 for more details.