craftbukkit/nms-patches/net/minecraft/server/commands/CommandEffect.patch

--- a/net/minecraft/server/commands/CommandEffect.java
+++ b/net/minecraft/server/commands/CommandEffect.java
@@ -79,7 +79,7 @@
             if (entity instanceof EntityLiving) {
                 MobEffect mobeffect = new MobEffect(holder, k, i, false, flag);
 
-                if (((EntityLiving) entity).addEffect(mobeffect, commandlistenerwrapper.getEntity())) {
+                if (((EntityLiving) entity).addEffect(mobeffect, commandlistenerwrapper.getEntity(), org.bukkit.event.entity.EntityPotionEffectEvent.Cause.COMMAND)) { // CraftBukkit
                     ++j;
                 }
             }
@@ -106,7 +106,7 @@
         int i = 0;
 
         for (Entity entity : collection) {
-            if (entity instanceof EntityLiving && ((EntityLiving) entity).removeAllEffects()) {
+            if (entity instanceof EntityLiving && ((EntityLiving) entity).removeAllEffects(org.bukkit.event.entity.EntityPotionEffectEvent.Cause.COMMAND)) { // CraftBukkit
                 ++i;
             }
         }
@@ -133,7 +133,7 @@
         int i = 0;
 
         for (Entity entity : collection) {
-            if (entity instanceof EntityLiving && ((EntityLiving) entity).removeEffect(holder)) {
+            if (entity instanceof EntityLiving && ((EntityLiving) entity).removeEffect(holder, org.bukkit.event.entity.EntityPotionEffectEvent.Cause.COMMAND)) { // CraftBukkit
                 ++i;
             }
         }