Project Timeline - WordPress/WordPress-Coding-Standards GitHub Wiki

On 22nd April 2009, the original project from Urban Giraffe was packaged and published.
In May 2011 the project was forked and added to GitHub by Chris Adams.
In April 2012 XWP started to dedicate resources to develop and lead the creation of the sniffs and rulesets for WordPress-Core, WordPress-VIP (WordPress.com VIP), and WordPress-Extra.
In May 2015, an initial documentation ruleset was added as WordPress-Docs.
In 2015, J.D. Grimes began significant contributions, along with maintenance from Gary Jones.
In 2016, Juliette Reinders Folmer began contributing heavily, adding more commits in a year than anyone else in the five years since the project was added to GitHub.
In July 2018, version 1.0.0 of the project was released.
In May 2019, Denis Žoljom joined the maintainers team.