Fixes holoparasite injector being usable on anything

Content.Server/Guardian/CanHostGuardianComponent.cs

@@ -0,0 +1,8 @@
+using Robust.Shared.GameObjects;
+
+namespace Content.Server.Guardian;
+
+[RegisterComponent, ComponentProtoName("CanHostGuardian")]
+public class CanHostGuardianComponent : Component
+{
+}

Content.Server/Guardian/GuardianSystem.cs

@@ -126,6 +126,14 @@ namespace Content.Server.Guardian
                 return;
             }
 
+            // Can only inject things with the component...
+            if (!HasComp<CanHostGuardianComponent>(target))
+            {
+                _popupSystem.PopupEntity(Loc.GetString("guardian-activator-invalid-target"), user, Filter.Entities(user));
+                return;
+            }
+
+
             // If user is already a host don't duplicate.
             if (HasComp<GuardianHostComponent>(target))
             {

Resources/Changelog/Parts/holoparasite.yml

@@ -0,0 +1,4 @@
+author: Your_Name_Here
+changes:
+  - type: Fix # One of the following: Add, Remove, Tweak, Fix
+    message: Fixes guardian injector being usable on anything. Now only humans can use it.

Resources/Locale/en-US/guardian/guardian.ftl

@@ -7,6 +7,7 @@ guardian-already-present-invalid-creation = You are NOT re-living that haunting
 guardian-no-actions-invalid-creation = You don't have the ability to host a guardian!
 guardian-activator-empty-invalid-creation = The injector is spent.
 guardian-activator-empty-examine = [color=#ba1919]The injector is spent.[/color]
+guardian-activator-invalid-target = Only humans can be injected! # Change this once other species can inject it?
 guardian-no-soul = Your guardian has no soul.
 guardian-available = Your guardian now has a soul.
 

Resources/Prototypes/Entities/Mobs/NPCs/animals.yml

@@ -371,6 +371,9 @@
     makeSentient: true
     name: monkey
     description: Ook ook!
+    rules: |
+      Being a monkey does NOT give you a free pass to kill, RDM or self-antag.
+
   - type: Sprite
     drawdepth: Mobs
     layers:

Resources/Prototypes/Entities/Mobs/Player/human.yml

@@ -21,6 +21,7 @@
   - type: CameraRecoil
   - type: Examiner
   - type: HumanInventoryController
+  - type: CanHostGuardian
   - type: AiFactionTag
     factions:
     - NanoTrasen