Developer docs for the upcoming Spring ’13 release are now available for preview.
The Force.com Tooling API Developer’s Guide describes new SOAP and REST interfaces that allow you to build custom development tools for Force.com applications. Using Tooling API, you can:
You can find all the preview developer docs on the Documentation page under “Preview: Reference Documentation, PREVIEW Spring ’13 (Version 27.0)”.
To see the preview release notes, click here (PDF).
Stay tuned for more announcements, and don’t forget to register for the Spring ’13 Release Developer Preview webinar on January 30, 2013 to get an overview of the key features you shouldn’t miss.