Do you need your resources, items and terrain in place when you plan, or can you use what you gain during the action phase?

Question

Accepted Answer

In place when you plan. Everything an action needs (resources, built items, weapon level, explored terrain, determination tokens) must already exist at planning, so a Shelter, item or token gained this phase cannot support another action this round. Once an action is planned, losing the item later in the phase does not cancel it.

Robinson Crusoe: Adventures on the Cursed Island

Do you need your resources, items and terrain in place when you plan, or can you use what you gain during the action phase?