diff --git a/src/core/plan.h b/src/core/plan.h
index e53d0ea..6780b07 100644
--- a/src/core/plan.h
+++ b/src/core/plan.h
@@ -17,18 +17,56 @@ typedef enum effect_type_t {
   ZDWM_EFFECT_MAP_WINDOW,
   ZDWM_EFFECT_UNMAP_WINDOW,
   ZDWM_EFFECT_FOCUS_WINDOW,
+  ZDWM_EFFECT_MOVE_WINDOW,
+  ZDWM_EFFECT_RESIZE_WINDOW,
+  ZDWM_EFFECT_CHANGE_BORDER_COLOR,
+  ZDWM_EFFECT_CHANGE_BORDER_WIDTH,
+  ZDWM_EFFECT_CHANGE_WINDOW_LIST,
+  ZDWM_EFFECT_RESTACK_WINDOWS,
 } effect_type_t;
 
 typedef struct effect_only_window_id_t {
   window_id_t window;
 } effect_only_window_id_t;
 
+typedef struct effect_move_window_t {
+  window_id_t window;
+  point_t left_top_point;
+} effect_move_window_t;
+
+typedef struct effect_resize_window_t {
+  window_id_t window;
+  int32_t width;
+  int32_t height;
+} effect_resize_window_t;
+
+typedef struct effect_change_border_color_t {
+  window_id_t window;
+  const color_t *color;
+} effect_change_border_color_t;
+
+typedef struct effect_change_border_width_t {
+  window_id_t window;
+  uint32_t border_width;
+} effect_change_border_width_t;
+
+typedef struct effect_window_list_t {
+  const window_id_t *windows;
+  size_t count;
+} effect_window_list_t;
+
 typedef struct effect_t {
   effect_type_t type;
   union {
     effect_only_window_id_t map;
     effect_only_window_id_t unmap;
     effect_only_window_id_t focus;
+    effect_move_window_t move;
+    effect_resize_window_t resize;
+    effect_change_border_color_t change_border_color;
+    effect_change_border_width_t change_border_width;
+    effect_window_list_t change_window_list;
+    effect_window_list_t restack_windows;
   } as;
 } effect_t;
 
diff --git a/src/core/types.h b/src/core/types.h
index b360e65..40f9a15 100644
--- a/src/core/types.h
+++ b/src/core/types.h
@@ -24,6 +24,14 @@ typedef struct point_t {
   int32_t y;
 } point_t;
 
+typedef struct color_t {
+  uint32_t rgba;
+  uint32_t argb;
+
+  /* RGBA color channels for Cairo, each channel in the range [0, 1] */
+  double red, green, blue, alpha;
+} color_t;
+
 typedef enum window_geometry_mode_t {
   ZDWM_GEOMETRY_NORMAL,
   ZDWM_GEOMETRY_MAXIMIZED,