# Propose Move-forward operator if front is not blocked
# If the tank is not blocked in the forward direction, propose the move 
# operator.

sp {wander*propose*move
   (state <s> ^name wander
              ^io.input-link.blocked.forward no)
-->
   (<s> ^operator <o> + =)
   (<o> ^name move
        ^actions.move.direction forward)}
