Version 1.2 of the WordPress REST API was released today. It's release follows nine months of work, and it will be the last pre-2.0 release for the API.
Development on the 1.2 branch has been active, but was entirely on Github until it was synced back to the WordPress plugin repo today. It's now stable enough to be used on production websites.
In the release post, Rachel Baker highlights the major changes and links to the larger changelog. Twenty nine individuals got props in the 1.2 release — an excellent testament to the attention this project is getting. However, project leads Ryan McCue and Rachel Baker made huge, huge contributions, with 73 and 86 commits respectively. Daniel Bachhuber, Eddie Hurtig, Sarah Gooding, and Josh Kadis also all made 5+ contributions.
Also noted in the release post, they're working on a beta release for 2.0 next month, which is a huge milestone. The 2.0 branch will break some backward compatibility with 1.x, and it'll also be the version that will be proposed for WordPress core inclusion “sometime in 2015.”
As readers know I have said before, I think this is the biggest thing for WordPress since custom post types. WordCamp attendance for WP REST API sessions seems to confirm the anticipation.
If you're in Atlanta, San Diego, or Seattle this weekend and haven't seen a presentation on the API yet, be sure to catch one at these WordCamps.