diff --git a/index.ts b/index.ts
--- a/index.ts
+++ b/index.ts
@@ -92,19 +92,18 @@
         Effect.withSpan("TodoRepository.list"),
       ),
       get,
-      create: (input) =>
-        Effect.gen(function* () {
-          const timestamp = now();
-          const todo: Todo = {
-            id: crypto.randomUUID(),
-            title: input.title,
-            completed: input.completed ?? false,
-            createdAt: timestamp,
-            updatedAt: timestamp,
-          };
-          yield* Ref.update(todos, (store) => new Map(store).set(todo.id, todo));
-          return todo;
-        }).pipe(Effect.withSpan("TodoRepository.create")),
+      create: Effect.fn("TodoRepository.create")(function* (input) {
+        const timestamp = now();
+        const todo: Todo = {
+          id: crypto.randomUUID(),
+          title: input.title,
+          completed: input.completed ?? false,
+          createdAt: timestamp,
+          updatedAt: timestamp,
+        };
+        yield* Ref.update(todos, (store) => new Map(store).set(todo.id, todo));
+        return todo;
+      }),
       update: (id, input) =>
         Effect.gen(function* () {
           const existing = yield* get(id);