Show entities at player position beneath the map

Adds a "Here: goblin, Ally" line after the map grid listing mobs and
other players sharing the tile. Dead mobs are excluded.

src/mudlib/commands/look.py

@@ -102,6 +102,18 @@ async def cmd_look(player: Player, args: str) -> None:
     # Send to player
     player.writer.write("\r\n".join(output_lines) + "\r\n")
 
+    # Show entities (mobs, other players) at the player's position
+    entities_here = [
+        obj
+        for obj in zone.contents_at(player.x, player.y)
+        if isinstance(obj, Entity)
+        and obj is not player
+        and (not hasattr(obj, "alive") or obj.alive)
+    ]
+    if entities_here:
+        names = ", ".join(e.name for e in entities_here)
+        player.writer.write(f"Here: {names}\r\n")
+
     # Show items on the ground at player's position
     from mudlib.portal import Portal
 

tests/test_commands.py

@@ -432,3 +432,68 @@ async def test_look_ignores_items_at_other_positions(player, test_zone):
 
     output = "".join([call[0][0] for call in player.writer.write.call_args_list])
     assert "far_rock" not in output.lower()
+
+
+@pytest.mark.asyncio
+async def test_look_shows_entities_here(player, test_zone):
+    """look lists mobs and other players at the player's position."""
+    from mudlib.entity import Mob
+    from mudlib.player import players
+
+    players.clear()
+    players[player.name] = player
+
+    Mob(name="goblin", location=test_zone, x=5, y=5, description="a goblin")
+    other = Player(
+        name="Ally",
+        location=test_zone,
+        x=5,
+        y=5,
+        reader=MagicMock(),
+        writer=MagicMock(),
+    )
+    players["Ally"] = other
+
+    await look.cmd_look(player, "")
+
+    output = "".join(c[0][0] for c in player.writer.write.call_args_list)
+    assert "Here: " in output
+    assert "goblin" in output
+    assert "Ally" in output
+
+
+@pytest.mark.asyncio
+async def test_look_hides_dead_mobs_from_here(player, test_zone):
+    """look omits dead mobs from the here line."""
+    from mudlib.entity import Mob
+    from mudlib.player import players
+
+    players.clear()
+    players[player.name] = player
+
+    Mob(
+        name="corpse",
+        location=test_zone,
+        x=5,
+        y=5,
+        description="dead",
+        alive=False,
+    )
+    await look.cmd_look(player, "")
+
+    output = "".join(c[0][0] for c in player.writer.write.call_args_list)
+    assert "corpse" not in output
+
+
+@pytest.mark.asyncio
+async def test_look_no_here_line_when_alone(player, test_zone):
+    """look omits the here line when no other entities are present."""
+    from mudlib.player import players
+
+    players.clear()
+    players[player.name] = player
+
+    await look.cmd_look(player, "")
+
+    output = "".join(c[0][0] for c in player.writer.write.call_args_list)
+    assert "Here:" not in output