diff --git a/core/shared/src/main/scala/caseapp/Annotations.scala b/annotations/shared/src/main/scala/caseapp/Annotations.scala
similarity index 57%
rename from core/shared/src/main/scala/caseapp/Annotations.scala
rename to annotations/shared/src/main/scala/caseapp/Annotations.scala
index 42af957a..ee862a21 100644
--- a/core/shared/src/main/scala/caseapp/Annotations.scala
+++ b/annotations/shared/src/main/scala/caseapp/Annotations.scala
@@ -1,45 +1,16 @@
 package caseapp
 
-import core.util._
 import scala.annotation.StaticAnnotation
 
 /**
  * Extra name for the annotated argument
  */
-case class Name(name: String) extends StaticAnnotation {
-  private def isShort = name.length == 1
-
-  val optionName = pascalCaseSplit(name.toList).map(_.toLowerCase).mkString("-")
-  def option = opt
-  private val opt = if (isShort) s"-$name" else s"--$optionName"
-  private val optEq = if (isShort) s"-$name=" else s"--$optionName="
-
-  def apply(args: List[String], isFlag: Boolean): Option[List[String]] = args match {
-    case Nil => None
-    case h :: t =>
-      if (h == opt)
-        Some(t)
-      else if (!isFlag && h.startsWith(optEq))
-        Some(h.drop(optEq.length) :: t)
-      else
-        None
-  }
-
-  def apply(arg: String): Either[Unit, Option[String]] =
-    if (arg == opt)
-      Right(None)
-    else if (arg.startsWith(optEq))
-      Right(Some(arg.drop(optEq.length)))
-    else
-      Left(())
-}
+case class Name(name: String) extends StaticAnnotation
 
 /**
  * Description of the value of the annotated argument
  */
-case class ValueDescription(description: String) extends StaticAnnotation {
-  def message: String = s"<$description>"
-}
+case class ValueDescription(description: String) extends StaticAnnotation
 
 /**
  * Help message for the annotated argument
diff --git a/build.sbt b/build.sbt
index 70bfcc08..5f0ce59f 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,13 +1,22 @@
 
 lazy val `case-app` = project.in(file("."))
-  .aggregate(utilJVM, utilJS, coreJVM, coreJS, doc)
-  .dependsOn(utilJVM, coreJVM)
+  .aggregate(utilJVM, utilJS, annotationsJVM, annotationsJS, coreJVM, coreJS, doc)
+  .dependsOn(utilJVM, annotationsJVM, coreJVM)
   .settings(commonSettings)
   .settings(noPublishSettings)
   .settings(
     name := "case-app-root"
   )
 
+lazy val annotations = crossProject
+  .settings(commonSettings: _*)
+  .settings(
+    name := "case-app-annotations"
+  )
+
+lazy val annotationsJVM = annotations.jvm
+lazy val annotationsJS = annotations.js
+
 lazy val util = crossProject
   .settings(commonSettings: _*)
   .settings(
@@ -23,7 +32,7 @@ lazy val utilJVM = util.jvm
 lazy val utilJS = util.js
 
 lazy val core = crossProject
-  .dependsOn(util)
+  .dependsOn(annotations, util)
   .settings(commonSettings: _*)
   .settings(
     name := "case-app",
@@ -90,12 +99,12 @@ lazy val fullReleaseSettings = Seq(
       </developer>
     </developers>
   },
-  credentials += {
+  credentials ++= {
     Seq("SONATYPE_USER", "SONATYPE_PASS").map(sys.env.get) match {
       case Seq(Some(user), Some(pass)) =>
-        Credentials("Sonatype Nexus Repository Manager", "oss.sonatype.org", user, pass)
+        Seq(Credentials("Sonatype Nexus Repository Manager", "oss.sonatype.org", user, pass))
       case _ =>
-        Credentials(Path.userHome / ".ivy2" / ".credentials")
+        Seq.empty
     }
   }
 )
diff --git a/core/jvm/src/test/scala/caseapp/PlatformTests.scala b/core/jvm/src/test/scala/caseapp/PlatformTests.scala
index 6a598e25..dfe4ca9d 100644
--- a/core/jvm/src/test/scala/caseapp/PlatformTests.scala
+++ b/core/jvm/src/test/scala/caseapp/PlatformTests.scala
@@ -2,8 +2,6 @@ package caseapp
 
 import java.util.GregorianCalendar
 
-import caseapp.core.Parser
-
 import org.scalatest.{ Matchers, FlatSpec }
 
 object PlatformTests {
diff --git a/core/shared/src/main/scala/caseapp/core/package.scala b/core/shared/src/main/scala/caseapp/core/package.scala
new file mode 100644
index 00000000..8d9e5627
--- /dev/null
+++ b/core/shared/src/main/scala/caseapp/core/package.scala
@@ -0,0 +1,39 @@
+package caseapp
+
+package object core {
+
+  implicit class NameOps(name: Name) {
+
+    private def isShort = name.name.length == 1
+
+    private def optionName = caseapp.core.util.pascalCaseSplit(name.name.toList).map(_.toLowerCase).mkString("-")
+    private def optionEq = if (isShort) s"-${name.name}=" else s"--$optionName="
+
+    def option: String = if (isShort) s"-${name.name}" else s"--$optionName"
+
+    def apply(args: List[String], isFlag: Boolean): Option[List[String]] = args match {
+      case Nil => None
+      case h :: t =>
+        if (h == option)
+          Some(t)
+        else if (!isFlag && h.startsWith(optionEq))
+          Some(h.drop(optionEq.length) :: t)
+        else
+          None
+    }
+
+    def apply(arg: String): Either[Unit, Option[String]] =
+      if (arg == option)
+        Right(None)
+      else if (arg.startsWith(optionEq))
+        Right(Some(arg.drop(optionEq.length)))
+      else
+        Left(())
+  }
+
+  implicit class ValueDescriptionOps(desc: ValueDescription) {
+
+    def message: String = s"<${desc.description}>"
+  }
+
+}
diff --git a/project/plugins.sbt b/project/plugins.sbt
index 5e933b89..b3f32937 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -6,6 +6,6 @@ resolvers += Resolver.url(
 
 addSbtPlugin("com.jsuereth" % "sbt-pgp" % "1.0.0")
 addSbtPlugin("org.tpolecat" % "tut-plugin" % "0.4.0")
-addSbtPlugin("org.scala-js" % "sbt-scalajs" % "0.6.8")
+addSbtPlugin("org.scala-js" % "sbt-scalajs" % "0.6.9")
 
-addSbtPlugin("com.github.alexarchambault" % "coursier-sbt-plugin" % "1.0.0-M10")
+addSbtPlugin("io.get-coursier" % "sbt-coursier" % "1.0.0-M11")