Design section for each task should cover implementation method for this task - how it should be implemented. For each task in Design section, please include: 
 * Tools that should be used for the implementation
 * What are the specific result requirements
  * What type - code, diagrams, wiki pages, etc.
  * Exact file format and location of the results.
 * For code tasks:
  * Required libraries
  * UML diagrams (class diagrams) where needed
A good design doesn't leave any questions about implementation - when it's read, implementation should be trivial.
Use the design section [wiki:PageTemplates/TaskPageTemplate#Design] of the Task Page Template.