A little bit of layout up and displaying to get started.

battle.cpp

@@ -15,10 +15,8 @@ namespace combat {
 
       if(enemy.ai.active()) {
         if(enemy.ai.wants_to("kill_enemy")) {
-          fmt::println(">> enemy {} wants to KILL", entity);
           pending_actions.emplace_back(enemy, BattleAction::ATTACK);
         } else if(enemy.ai.wants_to("run_away")) {
-          fmt::println(">> enemy {} wants to RUN", entity);
           pending_actions.emplace_back(enemy, BattleAction::ESCAPE);
         }
       }

boss/ui.cpp

@@ -1,24 +1,32 @@
 #include "boss/ui.hpp"
+#include "constants.hpp"
 
 namespace boss {
-  UI::UI(shared_ptr<World> world, Entity boss_id) {
-    (void)world;
-    (void)boss_id;
+  UI::UI(shared_ptr<World> world, Entity boss_id)
+    : $world(world), $boss_id(boss_id)
+  {
   }
 
   void UI::init() {
-
+    $gui.position(SCREEN_WIDTH-BOSS_VIEW_WIDTH,0, BOSS_VIEW_WIDTH, SCREEN_HEIGHT);
+    $gui.layout(
+        "[a1|b1|c1|d1|e1|f1]"
+        "[a2|b2|c2|d2|e2|f2]"
+        "[a3|b3|c3|d3|e3|f3]"
+        "[a4|b4|c4|d4|e4|f4]"
+        "[a5|b5|c5|d5|e5|f5]"
+        "[a6|b6|c6|d6|e6|f6]"
+        );
+    $gui.init();
   }
 
   void UI::render(sf::RenderWindow& window) {
-    (void)window;
+    $gui.render(window);
+    $gui.debug_layout(window);
   }
 
   bool UI::mouse(float x, float y, guecs::Modifiers mods) {
-    (void)x;
-    (void)y;
-    (void)mods;
-    return false;
+    return $gui.mouse(x, y, mods);
   }
 
   bool UI::boss_dead() {

boss/ui.hpp

@@ -9,6 +9,9 @@ namespace boss {
   using namespace DinkyECS;
 
   struct UI {
+    shared_ptr<World> $world = nullptr;
+    Entity $boss_id = NONE;
+    guecs::UI $gui;
 
     UI(shared_ptr<World> world, Entity boss_id);