restrict multi-step routing to visited locations only

src/agents/game_master.py

@@ -91,6 +91,12 @@ YOUR RULES:
    Never use a direction that is not listed in the current location's exits.
    Plan each step: from room_21 the only exit is downstairs to tavern,
    from tavern north leads to street. So room_21 to street = ['downstairs', 'north'].
+
+10. Multi-step movement is only allowed to locations the player has already visited.
+   These are shown in KNOWN MAP.
+   If the destination is not in KNOWN MAP, move one step at a time toward it
+   using only exits visible in the current location.
+   Never guess directions to unvisited locations.
 """
 
 GM_PROMPT = """

src/world/state.py

@@ -263,6 +263,27 @@ class WorldState:
             # Normalise to list to handle both single direction and multi-step
             directions = dest if isinstance(dest, list) else [dest]
 
+            # For multi-step paths, check if final destination is visited
+            # If not visited, truncate to single step only
+            if len(directions) > 1:
+                # Simulate the path to find the final location
+                simulated_loc = self.player.location
+                valid_directions = []
+                for direction in directions:
+                    loc = self.locations.get(simulated_loc)
+                    if loc and direction in loc.exits and loc.exits[direction] in self.locations:
+                        next_loc_id = loc.exits[direction]
+                        next_loc = self.locations[next_loc_id]
+                        if not next_loc.visited and next_loc_id != self.player.location:
+                            # Unvisited destination — stop path here, take only this one step
+                            valid_directions.append(direction)
+                            break
+                        valid_directions.append(direction)
+                        simulated_loc = next_loc_id
+                    else:
+                        break
+                directions = valid_directions if valid_directions else directions[:1]
+
             for direction in directions:
                 loc = self.current_location()
                 if direction in loc.exits and loc.exits[direction] in self.locations: