Each feature and system in the game needs technical documentation as a companion to (and linked to) its detailed design page.
The technical documentation is focused on the methods of implementation rather than designer rationale. These pages do not contain any of the "designy" elements such as why the feature is included, the desired player experience, etc. This is meant solely for the detailed, specific technical definition of the feature. Those programming the feature should primarily contribute to these pages, including any algorithms or data structures required.
Elements for these pages include: