diff --git a/build.sbt b/build.sbt
index 69557c3..ab1442d 100644
--- a/build.sbt
+++ b/build.sbt
@@ -26,7 +26,7 @@ addCommandAlias("fixCheck", "scalafmtCheckAll")
 addCommandAlias("fix", "scalafmtAll")
 
 val commonSettings = Seq(
-  version := "0.2.1",
+  version := "0.2.2",
   scalaVersion := "3.3.0",
   scalacOptions ++= Seq(
     "-explain",
diff --git a/modules/core/src/main/scala/muffin/internal/router/RouterDSL.scala b/modules/core/src/main/scala/muffin/internal/router/RouterDSL.scala
index 522e124..a567f21 100644
--- a/modules/core/src/main/scala/muffin/internal/router/RouterDSL.scala
+++ b/modules/core/src/main/scala/muffin/internal/router/RouterDSL.scala
@@ -16,7 +16,7 @@ case class Handle[F[
 
 object Handle {
 
-  extension [F[
+  implicit class RouterOps[F[
       _
   ], H, N <: Singleton, CommandName <: Tuple, ActionName <: Tuple, ActionIn <: Tuple, DialogName <: Tuple, DialogIn <: Tuple](
       h: Handle[F, H, N, CommandName, ActionName, ActionIn, DialogName, DialogIn]
diff --git a/modules/integration/circe-json-interop/src/main/scala/muffin/interop/json/circe/codec.scala b/modules/integration/circe-json-interop/src/main/scala/muffin/interop/json/circe/codec.scala
index 94efbb9..6ea6a66 100644
--- a/modules/integration/circe-json-interop/src/main/scala/muffin/interop/json/circe/codec.scala
+++ b/modules/integration/circe-json-interop/src/main/scala/muffin/interop/json/circe/codec.scala
@@ -14,7 +14,16 @@ import muffin.codec.*
 import muffin.error.MuffinError
 import muffin.http.Body
 
-object codec extends CodecSupport[Encoder, Decoder] {
+
+object codec extends codecA
+
+trait codecA extends CodecLow {
+  given NothingTo: io.circe.Encoder[Nothing] = UnitTo.asInstanceOf[Encoder[Nothing]]
+
+  given NothingFrom: io.circe.Decoder[Nothing] = UnitFrom.asInstanceOf[Decoder[Nothing]]
+}
+
+trait CodecLow extends CodecSupport[Encoder, Decoder] {
 
   given EncoderTo: FunctionK[Encoder, Encode] =
     new FunctionK[Encoder, Encode] {
@@ -68,10 +77,6 @@ object codec extends CodecSupport[Encoder, Decoder] {
 
   given LongFrom: io.circe.Decoder[Long] = Decoder.decodeLong
 
-  given NothingTo: io.circe.Encoder[Nothing] = UnitTo.asInstanceOf[Encoder[Nothing]]
-
-  given NothingFrom: io.circe.Decoder[Nothing] = UnitFrom.asInstanceOf[Decoder[Nothing]]
-
   given AnyTo: io.circe.Encoder[Any] = UnitTo.asInstanceOf[Encoder[Any]]
 
   given AnyFrom: io.circe.Decoder[Any] = UnitFrom.asInstanceOf[Decoder[Any]]
diff --git a/modules/integration/zio-json-interop/src/main/scala/muffin/interop/json/zio/codec.scala b/modules/integration/zio-json-interop/src/main/scala/muffin/interop/json/zio/codec.scala
index feb803f..1412f65 100644
--- a/modules/integration/zio-json-interop/src/main/scala/muffin/interop/json/zio/codec.scala
+++ b/modules/integration/zio-json-interop/src/main/scala/muffin/interop/json/zio/codec.scala
@@ -11,7 +11,13 @@ import muffin.codec.*
 import muffin.error.MuffinError
 import muffin.http.Body
 
-object codec extends CodecSupport[JsonEncoder, JsonDecoder] {
+object codec extends CodecA {
+  given NothingTo: JsonEncoder[Nothing] = UnitTo.asInstanceOf[JsonEncoder[Nothing]]
+
+  given NothingFrom: JsonDecoder[Nothing] = UnitFrom.asInstanceOf[JsonDecoder[Nothing]]
+}
+
+trait CodecA extends CodecSupport[JsonEncoder, JsonDecoder] {
 
   given EncodeTo[A: JsonEncoder]: Encode[A] = _.toJson
 
@@ -53,10 +59,6 @@ object codec extends CodecSupport[JsonEncoder, JsonDecoder] {
 
   given LongFrom: JsonDecoder[Long] = JsonDecoder.long
 
-  given NothingTo: JsonEncoder[Nothing] = UnitTo.asInstanceOf[JsonEncoder[Nothing]]
-
-  given NothingFrom: JsonDecoder[Nothing] = UnitFrom.asInstanceOf[JsonDecoder[Nothing]]
-
   given AnyTo: JsonEncoder[Any] = UnitTo.asInstanceOf[JsonEncoder[Any]]
 
   given AnyFrom: JsonDecoder[Any] = UnitFrom.asInstanceOf[JsonDecoder[Any]]