diff --git a/.smalltalk.ston b/.smalltalk.ston
index 2161231..9fe2564 100644
--- a/.smalltalk.ston
+++ b/.smalltalk.ston
@@ -4,6 +4,7 @@ SmalltalkCISpec {
       #baseline : 'MooseRuleEngine',
       #directory : 'src',
       #ignoreImage : true,
+      #load : [ 'tests' ],
       #onConflict : #useIncoming,
       #onUpgrade : #useIncoming
     }
@@ -14,4 +15,4 @@ SmalltalkCISpec {
       #format : #lcov
     }
   }
-}
\ No newline at end of file
+}
diff --git a/README.md b/README.md
index baa64e7..509afab 100644
--- a/README.md
+++ b/README.md
@@ -35,19 +35,31 @@ Moose-Rule-Engine is a multi-language, rule-based engine designed for code analy
 
 ### From Playground
 
-To load the Moose-Rule-Engine from the Playground, run the following script:
+To load Moose-Rule-Engine runtime from a Playground:
 
 ```st
 Metacello new
   githubUser: 'Evref-BL' project: 'Moose-Rule-Engine' commitish: 'main' path: 'src';
   baseline: 'MooseRuleEngine';
+  loads: #( 'default' );
+  onConflict: [ :ex | ex useIncoming ];
+  load.
+```
+
+To load everything for development, including tests:
+
+```st
+Metacello new
+  githubUser: 'Evref-BL' project: 'Moose-Rule-Engine' commitish: 'main' path: 'src';
+  baseline: 'MooseRuleEngine';
+  loads: #( 'dev' );
   onConflict: [ :ex | ex useIncoming ];
   load.
 ```
 
 ### Baseline Dependency
 
-To include Moose-Rule-Engine as a dependency in your project, add the following to your baseline:
+To use Moose-Rule-Engine as a dependency:
 
 ```st
 spec baseline: 'MooseRuleEngine' with: [
@@ -55,6 +67,8 @@ spec baseline: 'MooseRuleEngine' with: [
 ].
 ```
 
+By default this loads only the runtime package. Tests and dev dependencies are opt-in through the `tests` or `dev` groups.
+
 ---
 
 ## Usage
diff --git a/src/BaselineOfMooseRuleEngine/BaselineOfMooseRuleEngine.class.st b/src/BaselineOfMooseRuleEngine/BaselineOfMooseRuleEngine.class.st
index b6c6143..c069c5d 100644
--- a/src/BaselineOfMooseRuleEngine/BaselineOfMooseRuleEngine.class.st
+++ b/src/BaselineOfMooseRuleEngine/BaselineOfMooseRuleEngine.class.st
@@ -10,18 +10,15 @@ BaselineOfMooseRuleEngine >> baseline: spec [
 
 	<baseline>
 	spec for: #common do: [
-		self defineDependencies: spec.
-		self definePackages: spec.
-		self defineGroups: spec ]
+			self defineDependencies: spec.
+			self defineDevDependencies: spec.
+			self definePackages: spec.
+			self defineGroups: spec ]
 ]
 
 { #category : 'dependencies' }
 BaselineOfMooseRuleEngine >> defineDependencies: spec [
 
-	spec
-		baseline: 'Mocketry'
-		with: [ spec repository: 'github://dionisiydk/Mocketry:v7.0.3' ].
-
 	spec
 		baseline: 'LLMAPI'
 		with: [ spec repository: 'github://Evref-BL/Pharo-LLMAPI:1.0.4/src' ].
@@ -29,18 +26,30 @@ BaselineOfMooseRuleEngine >> defineDependencies: spec [
 	spec
 		baseline: 'SonarqubePharoAPI'
 		with: [
-		spec repository: 'github://Evref-BL/Sonarqube-Pharo-API:0.1.0' ].
+		spec repository: 'github://Evref-BL/Sonarqube-Pharo-API:0.1.0' ]
+]
+
+{ #category : 'dependencies' }
+BaselineOfMooseRuleEngine >> defineDevDependencies: spec [
+
+	spec
+		baseline: 'Mocketry'
+		with: [ spec repository: 'github://dionisiydk/Mocketry:v7.0.3' ].
 
 	spec baseline: 'FASTJava' with: [
-		spec
-			repository: 'github://moosetechnology/FAST-Java:v4/src';
-			loads: #( 'smacc' ) ]
+			spec
+				repository: 'github://moosetechnology/FAST-Java:v4/src';
+				loads: #( 'smacc' ) ]
 ]
 
 { #category : 'groups' }
 BaselineOfMooseRuleEngine >> defineGroups: spec [
 
-	
+	spec
+		group: 'default' with: #( 'MooseRuleEngine' );
+		group: 'tests' with: #( 'MooseRuleEngine-Tests' );
+		group: 'dev' with: #( 'default' 'tests' );
+		group: 'all' with: #( 'default' 'tests' )
 ]
 
 { #category : 'packages' }