diff --git a/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/api/IAssemblyContributor.kt b/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/api/IAssemblyContributor.kt
new file mode 100644
index 00000000..64c1d19b
--- /dev/null
+++ b/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/api/IAssemblyContributor.kt
@@ -0,0 +1,10 @@
+package com.beust.kobalt.api
+
+import com.beust.kobalt.TaskResult
+
+/**
+ * Plug-ins that will be invoked during the "assemble" task.
+ */
+interface IAssemblyContributor {
+    fun assemble(project: Project, context: KobaltContext) : TaskResult
+}
diff --git a/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/internal/KobaltPluginXml.kt b/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/internal/KobaltPluginXml.kt
index 34c00333..b114af02 100644
--- a/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/internal/KobaltPluginXml.kt
+++ b/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/internal/KobaltPluginXml.kt
@@ -3,7 +3,6 @@ package com.beust.kobalt.internal
 import com.beust.kobalt.api.*
 import com.beust.kobalt.misc.log
 import java.io.ByteArrayInputStream
-import java.io.File
 import java.io.InputStream
 import javax.xml.bind.JAXBContext
 import javax.xml.bind.annotation.XmlElement
@@ -74,6 +73,7 @@ class PluginInfo(val xml: KobaltPluginXml, val classLoader: ClassLoader?) {
     val testSourceDirContributors = arrayListOf<ITestSourceDirectoryContributor>()
     val buildConfigFieldContributors = arrayListOf<IBuildConfigFieldContributor>()
     val taskContributors = arrayListOf<ITaskContributor>()
+    val assemblyContributors = arrayListOf<IAssemblyContributor>()
 
     // Not documented yet
     val buildConfigContributors = arrayListOf<IBuildConfigContributor>()
@@ -161,6 +161,7 @@ class PluginInfo(val xml: KobaltPluginXml, val classLoader: ClassLoader?) {
                 if (this is IMavenIdInterceptor) mavenIdInterceptors.add(this)
                 if (this is ITestSourceDirectoryContributor) testSourceDirContributors.add(this)
                 if (this is IBuildConfigContributor) buildConfigContributors.add(this)
+                if (this is IAssemblyContributor) assemblyContributors.add(this)
             }
         }
     }
@@ -191,6 +192,7 @@ class PluginInfo(val xml: KobaltPluginXml, val classLoader: ClassLoader?) {
         testSourceDirContributors.addAll(pluginInfo.testSourceDirContributors)
         mavenIdInterceptors.addAll(pluginInfo.mavenIdInterceptors)
         buildConfigContributors.addAll(pluginInfo.buildConfigContributors)
+        assemblyContributors.addAll(pluginInfo.assemblyContributors)
     }
 }
 
diff --git a/src/main/kotlin/com/beust/kobalt/plugin/packaging/PackagingPlugin.kt b/src/main/kotlin/com/beust/kobalt/plugin/packaging/PackagingPlugin.kt
index 4f1c582c..10d6cc09 100644
--- a/src/main/kotlin/com/beust/kobalt/plugin/packaging/PackagingPlugin.kt
+++ b/src/main/kotlin/com/beust/kobalt/plugin/packaging/PackagingPlugin.kt
@@ -25,7 +25,7 @@ class PackagingPlugin @Inject constructor(val dependencyManager : DependencyMana
         val executors: KobaltExecutors, val jarGenerator: JarGenerator, val warGenerator: WarGenerator,
         val zipGenerator: ZipGenerator, val taskContributor: TaskContributor,
         val pomFactory: PomGenerator.IFactory, val configActor: ConfigActor<InstallConfig>)
-            : BasePlugin(), IConfigActor<InstallConfig> by configActor, ITaskContributor {
+            : BasePlugin(), IConfigActor<InstallConfig> by configActor, ITaskContributor, IAssemblyContributor {
 
     companion object {
         const val PLUGIN_NAME = "Packaging"
@@ -140,9 +140,8 @@ class PackagingPlugin @Inject constructor(val dependencyManager : DependencyMana
                 runTask = { doTaskAssemble(project) })
     }
 
-    @Task(name = TASK_ASSEMBLE, description = "Package the artifacts",
-            runAfter = arrayOf(JvmCompilerPlugin.TASK_COMPILE))
-    fun doTaskAssemble(project: Project) : TaskResult {
+    // IAssemblyContributor
+    override fun assemble(project: Project, context: KobaltContext) : TaskResult {
         try {
             project.projectProperties.put(PACKAGES, packages)
             packages.filter { it.project.name == project.name }.forEach { pkg ->
@@ -159,6 +158,19 @@ class PackagingPlugin @Inject constructor(val dependencyManager : DependencyMana
         }
     }
 
+    @Task(name = TASK_ASSEMBLE, description = "Package the artifacts",
+            runAfter = arrayOf(JvmCompilerPlugin.TASK_COMPILE))
+    fun doTaskAssemble(project: Project) : TaskResult {
+        context.pluginInfo.assemblyContributors.forEach {
+            val thisResult = it.assemble(project, context)
+            if (! thisResult.success) {
+                // Abort at the first failure
+                return thisResult
+            }
+        }
+        return TaskResult()
+    }
+
     fun addPackage(p: PackageConfig) {
         packages.add(p)
     }