Add ciris module

build.sbt

@@ -1,6 +1,7 @@
 val Version = new {
   val Cats = "2.10.0"
   val Circe = "0.14.6"
+  val Ciris = "3.5.0"
   val Munit = "0.7.29"
   val Scala = "3.3.3"
 }
@@ -18,7 +19,7 @@ inThisBuild(
   )
 )
 
-lazy val root = project
+lazy val root = crossProject(JVMPlatform)
   .in(file("."))
   .enablePlugins(BlowoutYamlPlugin)
   .settings(noPublishSettings)
@@ -31,7 +32,7 @@ lazy val root = project
     },
     name := "enumeration-ext"
   )
-  .aggregate(core.jvm, core.js, circe.jvm, circe.js)
+  .aggregate(core, circe, ciris)
 
 lazy val core = crossProject(JVMPlatform, JSPlatform)
   .crossType(CrossType.Pure)
@@ -62,3 +63,15 @@ lazy val circe = crossProject(JVMPlatform, JSPlatform)
     name := "enumeration-ext-circe"
   )
   .dependsOn(core % "compile->compile;test->test")
+
+lazy val ciris = crossProject(JVMPlatform, JSPlatform)
+  .crossType(CrossType.Pure)
+  .withoutSuffixFor(JVMPlatform)
+  .in(file("modules/ciris"))
+  .settings(
+    libraryDependencies ++=
+      "is.cir" %% "ciris" % Version.Ciris ::
+        Nil,
+    name := "enumeration-ext-ciris"
+  )
+  .dependsOn(core % "compile->compile;test->test")

modules/ciris/src/main/scala/io/taig/enumeration/ext/ciris.scala

@@ -0,0 +1,16 @@
+package io.taig.enumeration.ext
+
+import cats.syntax.all.*
+import cats.{Hash, Show}
+import _root_.ciris.ConfigDecoder
+
+trait ciris:
+  given conficDecoder[A, B, C: Show](using mapping: Mapping[B, C], decoder: ConfigDecoder[A, C]): ConfigDecoder[A, B] =
+    ConfigDecoder[A, C].mapOption(typeName = mapping.values.map(mapping.inj).map(_.show).mkString("|"))(mapping.prj)
+
+  def decoderEnumeration[A, B, C: Show: Hash](
+      f: B => C
+  )(using EnumerationValues.Aux[B, B])(using decoder: ConfigDecoder[A, C]): ConfigDecoder[A, B] =
+    conficDecoder(using Show[C], Mapping.enumeration(f), decoder)
+
+object ciris extends ciris