Red blue doors
RedBlueDoors (issue #172): a single room split by one dividing wall
into two chambers, with a red and a blue Door both embedded in that
same wall (at two distinct rows) - both reachable from the left chamber
alone, no need to ever cross into the right one. Reward + termination on
opening blue while red is already open; opening blue first ends the
episode with no reward.
Deliberately simplified from MiniGrid's actual RedBlueDoorEnv._gen_grid
(checked directly, after PR #191's review caught an earlier, incorrect
claim of an exact match here): real MiniGrid places the agent in a
third, middle chamber, with red and blue on two different walls
leading to two separate outer chambers, not one shared wall - but since
toggle only needs the player adjacent-and-facing a door (never
actually walking through one), and termination fires the instant blue
opens (before either outer chamber could ever be reached), the two
layouts are behaviourally indistinguishable through gameplay: order,
not position, is all that determines success either way.
RedBlueDoors
Bases: Environment
Navix-RedBlueDoors-*. One room, a dividing wall holding a red and
a blue Door (both reachable from the start side). Success is
opening the blue door after the red one is already open; opening
blue first ends the episode with no reward. The task is about
ordering, not navigation.