(GDD) Game design document (Farming, Crafting, Gathering,Refining) for an indie rpg online game

We need a game design document for these features:

Farming:
- List of items to farm
- Skills idea to farm
- Skills levels
- item requirements to use
- Other idea

Gathering:
- Life skills list + levels
- Items list + requirements
- mini games idea

Crafting:
- Life skills list + levels
- Items list to craft + requirements