Remark. How a task acquires interactive semantics [ftip-006U]
✍️source

    Section 3.1 of [sutton2018reinforcement] specifies the agent--environment interaction. Section 2 of [kaelbling1998planning] separates hidden state from observation. We combine those ingredients with the task interface of Definition [ftip-001O] so each task instance selects an initial law and transition kernels.

    The outcome-extraction map is an additional interface choice; neither cited source supplies it in this task-indexed form. This map connects a stopped interaction to the candidate outcome that the independent evaluator will score.