diff --git a/admin/conf/logback.xml b/admin/conf/logback.xml
index 45418df2aa30..ce08bf16805c 100644
--- a/admin/conf/logback.xml
+++ b/admin/conf/logback.xml
@@ -30,7 +30,13 @@
 
     <root level="INFO">
         <appender-ref ref="LOGFILE"/>
-        <appender-ref ref="ASYNCSTDOUT"/>
     </root>
+    <if condition='!property("STAGE").contains("DEV")'>
+        <then>
+            <root level="INFO">
+                <appender-ref ref="ASYNCSTDOUT"/>
+            </root>
+        </then>
+    </if>
 
 </configuration>
diff --git a/applications/conf/logback.xml b/applications/conf/logback.xml
index 73674b3d957e..2631c29502ff 100644
--- a/applications/conf/logback.xml
+++ b/applications/conf/logback.xml
@@ -25,7 +25,13 @@
 
     <root level="INFO">
         <appender-ref ref="LOGFILE"/>
-        <appender-ref ref="ASYNCSTDOUT"/>
     </root>
+    <if condition='!property("STAGE").contains("DEV")'>
+        <then>
+            <root level="INFO">
+                <appender-ref ref="ASYNCSTDOUT"/>
+            </root>
+        </then>
+    </if>
 
 </configuration>
diff --git a/archive/conf/logback.xml b/archive/conf/logback.xml
index 34e52a438775..f8569dd5e112 100644
--- a/archive/conf/logback.xml
+++ b/archive/conf/logback.xml
@@ -25,7 +25,13 @@
 
     <root level="INFO">
         <appender-ref ref="LOGFILE"/>
-        <appender-ref ref="ASYNCSTDOUT"/>
     </root>
+    <if condition='!property("STAGE").contains("DEV")'>
+        <then>
+            <root level="INFO">
+                <appender-ref ref="ASYNCSTDOUT"/>
+            </root>
+        </then>
+    </if>
 
 </configuration>
diff --git a/article/conf/logback.xml b/article/conf/logback.xml
index befc7af7839f..d97caedccc1b 100644
--- a/article/conf/logback.xml
+++ b/article/conf/logback.xml
@@ -25,7 +25,13 @@
 
     <root level="INFO">
         <appender-ref ref="LOGFILE"/>
-        <appender-ref ref="ASYNCSTDOUT"/>
     </root>
+    <if condition='!property("STAGE").contains("DEV")'>
+        <then>
+            <root level="INFO">
+                <appender-ref ref="ASYNCSTDOUT"/>
+            </root>
+        </then>
+    </if>
 
 </configuration>
diff --git a/build.sbt b/build.sbt
index afc1bac4d019..fea5bd9fe35a 100644
--- a/build.sbt
+++ b/build.sbt
@@ -70,6 +70,7 @@ val common = library("common")
       pekkoSlf4j,
       pekkoSerializationJackson,
       pekkoActorTyped,
+      janino,
     ) ++ jackson,
     TestAssets / mappings ~= filterAssets,
   )
diff --git a/commercial/conf/logback.xml b/commercial/conf/logback.xml
index 044b5cfe3559..63dfc3ec7e73 100644
--- a/commercial/conf/logback.xml
+++ b/commercial/conf/logback.xml
@@ -25,7 +25,13 @@
 
     <root level="INFO">
         <appender-ref ref="LOGFILE"/>
-        <appender-ref ref="STDOUT"/>
     </root>
+    <if condition='!property("STAGE").contains("DEV")'>
+        <then>
+            <root level="INFO">
+                <appender-ref ref="STDOUT"/>
+            </root>
+        </then>
+    </if>
 
 </configuration>
diff --git a/common/test/resources/logback.xml b/common/test/resources/logback.xml
index 03c2e50630e4..2c8848d0524e 100644
--- a/common/test/resources/logback.xml
+++ b/common/test/resources/logback.xml
@@ -25,7 +25,13 @@
 
     <root level="INFO">
         <appender-ref ref="LOGFILE"/>
-        <appender-ref ref="ASYNCSTDOUT"/>
     </root>
+    <if condition='!property("STAGE").contains("DEV")'>
+        <then>
+            <root level="INFO">
+                <appender-ref ref="ASYNCSTDOUT"/>
+            </root>
+        </then>
+    </if>
 
 </configuration>
diff --git a/dev-build/conf/logback.xml b/dev-build/conf/logback.xml
index 34fad1454363..cb86de9b9c3a 100644
--- a/dev-build/conf/logback.xml
+++ b/dev-build/conf/logback.xml
@@ -29,7 +29,13 @@
 
     <root level="INFO">
         <appender-ref ref="LOGFILE"/>
-        <appender-ref ref="STDOUT"/>
     </root>
+    <if condition='!property("STAGE").contains("DEV")'>
+        <then>
+            <root level="INFO">
+                <appender-ref ref="ASYNCSTDOUT"/>
+            </root>
+        </then>
+    </if>
 
 </configuration>
diff --git a/discussion/conf/logback.xml b/discussion/conf/logback.xml
index f22cc96f287f..627925dab0ad 100644
--- a/discussion/conf/logback.xml
+++ b/discussion/conf/logback.xml
@@ -25,7 +25,13 @@
 
     <root level="INFO">
         <appender-ref ref="LOGFILE"/>
-        <appender-ref ref="ASYNCSTDOUT"/>
     </root>
+    <if condition='!property("STAGE").contains("DEV")'>
+        <then>
+            <root level="INFO">
+                <appender-ref ref="ASYNCSTDOUT"/>
+            </root>
+        </then>
+    </if>
 
 </configuration>
diff --git a/facia-press/conf/logback.xml b/facia-press/conf/logback.xml
index 19e1eadccec1..10d19e003049 100644
--- a/facia-press/conf/logback.xml
+++ b/facia-press/conf/logback.xml
@@ -25,7 +25,13 @@
 
     <root level="INFO">
         <appender-ref ref="LOGFILE"/>
-        <appender-ref ref="ASYNCSTDOUT"/>
     </root>
+    <if condition='!property("STAGE").contains("DEV")'>
+        <then>
+            <root level="INFO">
+                <appender-ref ref="ASYNCSTDOUT"/>
+            </root>
+        </then>
+    </if>
 
 </configuration>
diff --git a/facia/conf/logback.xml b/facia/conf/logback.xml
index 213c43784143..07d73510602c 100644
--- a/facia/conf/logback.xml
+++ b/facia/conf/logback.xml
@@ -25,7 +25,13 @@
 
     <root level="INFO">
         <appender-ref ref="LOGFILE"/>
-        <appender-ref ref="ASYNCSTDOUT"/>
     </root>
+    <if condition='!property("STAGE").contains("DEV")'>
+        <then>
+            <root level="INFO">
+                <appender-ref ref="ASYNCSTDOUT"/>
+            </root>
+        </then>
+    </if>
 
 </configuration>
diff --git a/identity/conf/logback.xml b/identity/conf/logback.xml
index 35795d61ae60..937dec8f9b93 100644
--- a/identity/conf/logback.xml
+++ b/identity/conf/logback.xml
@@ -29,6 +29,12 @@
 
     <root level="INFO">
         <appender-ref ref="LOGFILE"/>
-        <appender-ref ref="ASYNCSTDOUT"/>
     </root>
+    <if condition='!property("STAGE").contains("DEV")'>
+        <then>
+            <root level="INFO">
+                <appender-ref ref="ASYNCSTDOUT"/>
+            </root>
+        </then>
+    </if>
 </configuration>
diff --git a/onward/conf/logback.xml b/onward/conf/logback.xml
index 95974d06e781..80bfbd32b7ed 100644
--- a/onward/conf/logback.xml
+++ b/onward/conf/logback.xml
@@ -25,7 +25,13 @@
 
     <root level="INFO">
         <appender-ref ref="LOGFILE"/>
-        <appender-ref ref="ASYNCSTDOUT"/>
     </root>
+    <if condition='!property("STAGE").contains("DEV")'>
+        <then>
+            <root level="INFO">
+                <appender-ref ref="ASYNCSTDOUT"/>
+            </root>
+        </then>
+    </if>
 
 </configuration>
diff --git a/preview/conf/logback.xml b/preview/conf/logback.xml
index ce692fbc7dd2..acf142222892 100644
--- a/preview/conf/logback.xml
+++ b/preview/conf/logback.xml
@@ -25,7 +25,13 @@
 
     <root level="INFO">
         <appender-ref ref="LOGFILE"/>
-        <appender-ref ref="ASYNCSTDOUT"/>
     </root>
+    <if condition='!property("STAGE").contains("DEV")'>
+        <then>
+            <root level="INFO">
+                <appender-ref ref="ASYNCSTDOUT"/>
+            </root>
+        </then>
+    </if>
 
 </configuration>
diff --git a/project/Dependencies.scala b/project/Dependencies.scala
index 8283800dfafe..4e085fd83f2c 100644
--- a/project/Dependencies.scala
+++ b/project/Dependencies.scala
@@ -88,6 +88,7 @@ object Dependencies {
 
   val logstash = ("net.logstash.logback" % "logstash-logback-encoder" % "8.0")
     .excludeAll(ExclusionRule("com.fasterxml.jackson.core")) // Avoid conflicts with Play's Jackson dependency
+  val janino = "org.codehaus.janino" % "janino" % "3.1.12"
 
   val targetingClient = "com.gu.targeting-client" %% "client-play-json-v30" % "1.1.9"
   val scanamo = "org.scanamo" %% "scanamo" % "2.0.0"
diff --git a/rss/conf/logback.xml b/rss/conf/logback.xml
index 223af294c625..2435e9168caa 100644
--- a/rss/conf/logback.xml
+++ b/rss/conf/logback.xml
@@ -25,7 +25,13 @@
 
     <root level="INFO">
         <appender-ref ref="LOGFILE"/>
-        <appender-ref ref="ASYNCSTDOUT"/>
     </root>
+    <if condition='!property("STAGE").contains("DEV")'>
+        <then>
+            <root level="INFO">
+                <appender-ref ref="ASYNCSTDOUT"/>
+            </root>
+        </then>
+    </if>
 
 </configuration>
diff --git a/sbt b/sbt
index 6dc1c59a539d..fc9cbbfa7ead 100755
--- a/sbt
+++ b/sbt
@@ -59,4 +59,5 @@ export APP_SECRET="this_is_not_a_real_secret_just_for_tests"
 java $FRONTEND_JVM_ARGS  \
   $DEBUG_PARAMS \
   -Duser.timezone=Australia/Sydney \
+  -DSTAGE=DEV \
   -jar `dirname $0`/bin/sbt-launch.jar "$@"
diff --git a/sport/conf/logback.xml b/sport/conf/logback.xml
index 90bcb69fdf0f..d1b9a048be1b 100644
--- a/sport/conf/logback.xml
+++ b/sport/conf/logback.xml
@@ -25,7 +25,13 @@
 
     <root level="INFO">
         <appender-ref ref="LOGFILE"/>
-        <appender-ref ref="ASYNCSTDOUT"/>
     </root>
+    <if condition='!property("STAGE").contains("DEV")'>
+        <then>
+            <root level="INFO">
+                <appender-ref ref="ASYNCSTDOUT"/>
+            </root>
+        </then>
+    </if>
 
 </configuration>