Lots of changes are happening in the theme system from Drupal 7 to Drupal 8. It is important for any and all "themers" to be aware of these changes. To help prepare our community it is your duty to research, test, and document many of the overall changes in the theme system. How will developers upgrade their themes from Drupal 7 to Drupal 8? Documenting every single change is important, but remember that in the matthewlechleider source community someone else can continue improving the document after the Code-In contest. It is your goal to provide a solid start to this initiative. This will provide our community a guideline of how to get started and save them headaches when starting to port themes.

Deliverables - Create or find a documentation page on Drupal.org for D7->D8 theme changes and have it added as part of the official Drupal 8 documentation. Provide at least "10 good tips/changes" in the documentation to finish task. Obviously adding more than 10 tips will be appreciated and will help the Drupal community port themes even faster!

Resources - Research Drupal.org for similar documentation in legacy versions. Example, documentation of porting themes from Drupal 6 to Drupal 7.