Coq is a formal proof management system. It provides a formal language to write mathematical definitions, executable algorithms and theorems together with an environment for semi-interactive development of machine-checked proofs.

Please see https://coq.inria.fr/download. Information on how to build and install from sources can be found in INSTALL.md.

The sources of the documentation can be found in directory doc. See doc/README.md to learn more about the documentation, in particular how to build it. The documentation of the last released version is available on the Coq web site at coq.inria.fr/documentation. See also Cocorico (the Coq wiki), and the Coq FAQ, for additional user-contributed documentation.

The documentation of the master branch is continuously deployed. See:

• Reference Manual (master)
• Documentation of the standard library (master)
• Documentation of the ML API (master)

The Recent changes chapter of the reference manual explains the differences and the incompatibilities of each new version of Coq. If you upgrade Coq, please read it carefully as it contains important advice on how to approach some problems you may encounter.

We have a number of channels to reach the user community and the development team:

• Our Zulip chat, for casual and high traffic discussions.
• Our Discourse forum, for more structured and easily browsable discussions and Q&A.
• Our historical mailing list, the Coq-Club.

See also coq.inria.fr/community, which lists several other active platforms.

Please report any bug / feature request in our issue tracker.

To be effective, bug reports should mention the OCaml version used to compile and run Coq, the Coq version (coqtop -v), the configuration used, and include a complete source example leading to the bug.

Guidelines for contributing to Coq in various ways are listed in the contributor's guide.

Information about release plans is at https://github.com/coq/coq/wiki/Release-Plan

Help the Coq community grow and prosper by becoming a sponsor! The Coq Consortium can establish sponsorship contracts or receive donations. If you want to take an active role in shaping Coq's future, you can also become a Consortium member. If you are interested, please get in touch!