diff --git a/.envrc b/.envrc
index dc25ec7..a41f435 100644
--- a/.envrc
+++ b/.envrc
@@ -1,10 +1 @@
-if ! has nix_direnv_version || ! nix_direnv_version 2.2.1; then
-  source_url "https://raw.githubusercontent.com/nix-community/nix-direnv/2.2.1/direnvrc" "sha256-zelF0vLbEl5uaqrfIzbgNzJWGmLzCmYAkInj/LNxvKs="
-fi
-
-watch_file flake.nix
-watch_file flake.lock
-if ! use flake . --no-pure-eval
-then
-  echo "devenv could not be built. The devenv environment was not loaded. Make the necessary changes to devenv.nix and hit enter to try again." >&2
-fi
+use flake . --no-pure-eval
diff --git a/core/src/lu/foyer/EventSourcing.scala b/core/src/lu/foyer/EventSourcing.scala
index bd157af..af4031a 100644
--- a/core/src/lu/foyer/EventSourcing.scala
+++ b/core/src/lu/foyer/EventSourcing.scala
@@ -1,9 +1,6 @@
 package lu.foyer
 
 import zio.*
-import zio.schema.Schema
-
-import lu.foyer.auth.UserInfo
 
 final case class Entity[T](entityId: String, data: T, version: Long)
 final case class Event[T](entityId: String, data: T, eventId: String)
@@ -12,13 +9,3 @@ trait StateRepository[Data] extends Repository[Entity[Data], String]
 trait EventRepository[Data] extends Repository[Event[Data], String]:
   def fetchOne(entityId: String, eventId: String): Task[Option[Event[Data]]]
   def fetchMany(entityId: String, page: Page): Task[Paged[Event[Data]]]
-
-trait Reducer[Event, State]:
-  def fromEmpty: PartialFunction[Event, State]
-  def fromState: PartialFunction[(State, Event), State]
-
-  def reduce(event: Event): Option[State] =
-    fromEmpty.lift(event)
-
-  def reduce(state: State, event: Event): Option[State] =
-    fromState.lift((state, event))
diff --git a/core/src/lu/foyer/Reducer.scala b/core/src/lu/foyer/Reducer.scala
new file mode 100644
index 0000000..6d567fd
--- /dev/null
+++ b/core/src/lu/foyer/Reducer.scala
@@ -0,0 +1,11 @@
+package lu.foyer
+
+trait Reducer[Event, State]:
+  def fromEmpty: PartialFunction[Event, State]
+  def fromState: PartialFunction[(State, Event), State]
+
+  def reduce(event: Event): Option[State] =
+    fromEmpty.lift(event)
+
+  def reduce(state: State, event: Event): Option[State] =
+    fromState.lift((state, event))