diff --git a/src/effect/schema/MutableClass.ts b/src/effect/schema/MutableClass.ts
new file mode 100644
index 0000000..70f5411
--- /dev/null
+++ b/src/effect/schema/MutableClass.ts
@@ -0,0 +1,24 @@
+import { Schema as S } from "@effect/schema"
+import type { Annotations, Class, Struct } from "@effect/schema/Schema"
+import type { HasFields, MissingSelfGeneric } from "./util"
+
+
+export const MutableClass = <Self = never>(identifier: string) => (
+    <Fields extends Struct.Fields>(
+        fieldsOr:      Fields | HasFields<Fields>,
+        annotations?:  Annotations.Schema<Self>
+    ): (
+        [Self] extends [never]
+            ? MissingSelfGeneric<"Class">
+            : Class<
+                Self,
+                Fields,
+                Struct.Encoded<Fields>,
+                Struct.Context<Fields>,
+                Struct.Constructor<Fields>,
+                {},
+                {}
+            >
+    ) =>
+        S.Class<Self>(identifier)(fieldsOr, annotations)
+)
diff --git a/src/effect/schema/index.ts b/src/effect/schema/index.ts
index 336ce12..8c87023 100644
--- a/src/effect/schema/index.ts
+++ b/src/effect/schema/index.ts
@@ -1 +1 @@
-export {}
+export { MutableClass } from "./MutableClass"
diff --git a/src/effect/schema/tests.ts b/src/effect/schema/tests.ts
new file mode 100644
index 0000000..64a465e
--- /dev/null
+++ b/src/effect/schema/tests.ts
@@ -0,0 +1 @@
+import { Schema as S } from "@effect/schema"
diff --git a/src/effect/schema/util.ts b/src/effect/schema/util.ts
new file mode 100644
index 0000000..504f41b
--- /dev/null
+++ b/src/effect/schema/util.ts
@@ -0,0 +1,11 @@
+import type { Struct } from "@effect/schema/Schema"
+
+
+export type MissingSelfGeneric<Usage extends string, Params extends string = ""> = (
+    `Missing \`Self\` generic - use \`class Self extends ${Usage}<Self>()(${Params}{ ... })\``
+)
+
+export type HasFields<Fields extends Struct.Fields> = (
+    | { readonly fields: Fields }
+    | { readonly from: HasFields<Fields> }
+)