diff --git a/src/main/java/net/fabricmc/loom/task/AbstractRemapJarTask.java b/src/main/java/net/fabricmc/loom/task/AbstractRemapJarTask.java
index ca7da77e..7da1ea1e 100644
--- a/src/main/java/net/fabricmc/loom/task/AbstractRemapJarTask.java
+++ b/src/main/java/net/fabricmc/loom/task/AbstractRemapJarTask.java
@@ -75,6 +75,7 @@ public abstract class AbstractRemapJarTask extends Jar {
 	public static final String MANIFEST_NAMESPACE_KEY = "Fabric-Mapping-Namespace";
 	public static final String MANIFEST_SPLIT_ENV_KEY = "Fabric-Loom-Split-Environment";
 	public static final String MANIFEST_CLIENT_ENTRIES_KEY = "Fabric-Loom-Client-Only-Entries";
+	public static final String MANIFEST_JAR_TYPE_KEY = "Fabric-Jar-Type";
 	public static final Attributes.Name MANIFEST_SPLIT_ENV_NAME = new Attributes.Name(MANIFEST_SPLIT_ENV_KEY);
 	public static final Attributes.Name MANIFEST_CLIENT_ENTRIES_NAME = new Attributes.Name(MANIFEST_CLIENT_ENTRIES_KEY);
 
@@ -112,6 +113,11 @@ public abstract class AbstractRemapJarTask extends Jar {
 	@Optional
 	public abstract Property<String> getClientOnlySourceSetName();
 
+	@Input
+	@Optional
+	@ApiStatus.Internal
+	public abstract Property<String> getJarType();
+
 	private final Provider<JarManifestService> jarManifestServiceProvider;
 
 	@Inject
@@ -120,6 +126,7 @@ public abstract class AbstractRemapJarTask extends Jar {
 		getTargetNamespace().convention(MappingsNamespace.INTERMEDIARY.toString()).finalizeValueOnRead();
 		getRemapperIsolation().convention(false).finalizeValueOnRead();
 		getIncludesClientOnlyClasses().convention(false).finalizeValueOnRead();
+		getJarType().finalizeValueOnRead();
 
 		jarManifestServiceProvider = JarManifestService.get(getProject());
 		usesService(jarManifestServiceProvider);
@@ -149,6 +156,10 @@ public abstract class AbstractRemapJarTask extends Jar {
 				params.getClientOnlyEntries().set(clientOnlyEntries.stream().filter(s -> s.endsWith(".class")).toList());
 			}
 
+			if (getJarType().isPresent()) {
+				params.getManifestAttributes().put(MANIFEST_JAR_TYPE_KEY, getJarType().get());
+			}
+
 			action.execute(params);
 		});
 	}
diff --git a/src/main/java/net/fabricmc/loom/task/RemapJarTask.java b/src/main/java/net/fabricmc/loom/task/RemapJarTask.java
index e680792c..9639f3d1 100644
--- a/src/main/java/net/fabricmc/loom/task/RemapJarTask.java
+++ b/src/main/java/net/fabricmc/loom/task/RemapJarTask.java
@@ -109,6 +109,8 @@ public abstract class RemapJarTask extends AbstractRemapJarTask {
 		// Make outputs reproducible by default
 		setReproducibleFileOrder(true);
 		setPreserveFileTimestamps(false);
+
+		getJarType().set("classes");
 	}
 
 	private void setupPreparationTask() {
diff --git a/src/main/java/net/fabricmc/loom/task/RemapSourcesJarTask.java b/src/main/java/net/fabricmc/loom/task/RemapSourcesJarTask.java
index cca9638e..2a9424ac 100644
--- a/src/main/java/net/fabricmc/loom/task/RemapSourcesJarTask.java
+++ b/src/main/java/net/fabricmc/loom/task/RemapSourcesJarTask.java
@@ -51,6 +51,7 @@ public abstract class RemapSourcesJarTask extends AbstractRemapJarTask {
 		serviceManagerProvider = BuildSharedServiceManager.createForTask(this, getBuildEventsListenerRegistry());
 
 		getClasspath().from(getProject().getConfigurations().getByName(JavaPlugin.COMPILE_CLASSPATH_CONFIGURATION_NAME));
+		getJarType().set("sources");
 	}
 
 	@TaskAction