diff --git a/.changeset/blue-trees-draw.md b/.changeset/blue-trees-draw.md
new file mode 100644
index 0000000..8e2e8d9
--- /dev/null
+++ b/.changeset/blue-trees-draw.md
@@ -0,0 +1,5 @@
+---
+"create-effect-app": patch
+---
+
+Fix TypeScript compilation errors in monorepo template
diff --git a/templates/monorepo/packages/cli/src/Cli.ts b/templates/monorepo/packages/cli/src/Cli.ts
index 943529e..a5b8dcd 100644
--- a/templates/monorepo/packages/cli/src/Cli.ts
+++ b/templates/monorepo/packages/cli/src/Cli.ts
@@ -1,11 +1,12 @@
 import { Args, Command, Options } from "@effect/cli"
+import { TodoId } from "@template/domain/TodosApi"
 import { TodosClient } from "./TodosClient.js"
 
 const todoArg = Args.text({ name: "todo" }).pipe(
   Args.withDescription("The message associated with a todo")
 )
 
-const todoId = Options.integer("id").pipe(
+const todoId = Options.withSchema(Options.integer("id"), TodoId).pipe(
   Options.withDescription("The identifier of the todo")
 )
 
diff --git a/templates/monorepo/packages/cli/src/TodosClient.ts b/templates/monorepo/packages/cli/src/TodosClient.ts
index f3f68be..f77f444 100644
--- a/templates/monorepo/packages/cli/src/TodosClient.ts
+++ b/templates/monorepo/packages/cli/src/TodosClient.ts
@@ -1,4 +1,5 @@
 import { HttpApiClient } from "@effect/platform"
+import type { TodoId } from "@template/domain/TodosApi"
 import { TodosApi } from "@template/domain/TodosApi"
 import { Effect } from "effect"
 
@@ -19,14 +20,14 @@ export class TodosClient extends Effect.Service<TodosClient>()("cli/TodosClient"
       Effect.flatMap((todos) => Effect.logInfo(todos))
     )
 
-    function complete(id: number) {
+    function complete(id: TodoId) {
       return client.todos.completeTodo({ path: { id } }).pipe(
         Effect.flatMap((todo) => Effect.logInfo("Marked todo completed: ", todo)),
         Effect.catchTag("TodoNotFound", () => Effect.logError(`Failed to find todo with id: ${id}`))
       )
     }
 
-    function remove(id: number) {
+    function remove(id: TodoId) {
       return client.todos.removeTodo({ path: { id } }).pipe(
         Effect.flatMap(() => Effect.logInfo(`Deleted todo with id: ${id}`)),
         Effect.catchTag("TodoNotFound", () => Effect.logError(`Failed to find todo with id: ${id}`))
diff --git a/templates/monorepo/packages/domain/src/TodosApi.ts b/templates/monorepo/packages/domain/src/TodosApi.ts
index c289a2d..cac5d0c 100644
--- a/templates/monorepo/packages/domain/src/TodosApi.ts
+++ b/templates/monorepo/packages/domain/src/TodosApi.ts
@@ -24,7 +24,7 @@ export class TodosApiGroup extends HttpApiGroup.make("todos")
     HttpApiEndpoint.get("getTodoById", "/todos/:id")
       .addSuccess(Todo)
       .addError(TodoNotFound, { status: 404 })
-      .setPath(Schema.Struct({ id: Schema.NumberFromString }))
+      .setPath(Schema.Struct({ id: TodoIdFromString }))
   )
   .add(
     HttpApiEndpoint.post("createTodo", "/todos")
@@ -35,13 +35,13 @@ export class TodosApiGroup extends HttpApiGroup.make("todos")
     HttpApiEndpoint.patch("completeTodo", "/todos/:id")
       .addSuccess(Todo)
       .addError(TodoNotFound, { status: 404 })
-      .setPath(Schema.Struct({ id: Schema.NumberFromString }))
+      .setPath(Schema.Struct({ id: TodoIdFromString }))
   )
   .add(
     HttpApiEndpoint.del("removeTodo", "/todos/:id")
       .addSuccess(Schema.Void)
       .addError(TodoNotFound, { status: 404 })
-      .setPath(Schema.Struct({ id: Schema.NumberFromString }))
+      .setPath(Schema.Struct({ id: TodoIdFromString }))
   )
 {}
 
diff --git a/templates/monorepo/packages/server/src/TodosRepository.ts b/templates/monorepo/packages/server/src/TodosRepository.ts
index 7dde18b..384adf0 100644
--- a/templates/monorepo/packages/server/src/TodosRepository.ts
+++ b/templates/monorepo/packages/server/src/TodosRepository.ts
@@ -9,7 +9,7 @@ export class TodosRepository extends Effect.Service<TodosRepository>()("api/Todo
       Effect.map((todos) => Array.from(HashMap.values(todos)))
     )
 
-    function getById(id: number): Effect.Effect<Todo, TodoNotFound> {
+    function getById(id: TodoId): Effect.Effect<Todo, TodoNotFound> {
       return Ref.get(todos).pipe(
         Effect.flatMap(HashMap.get(id)),
         Effect.catchTag("NoSuchElementException", () => new TodoNotFound({ id }))
@@ -18,20 +18,20 @@ export class TodosRepository extends Effect.Service<TodosRepository>()("api/Todo
 
     function create(text: string): Effect.Effect<Todo> {
       return Ref.modify(todos, (map) => {
-        const id = TodoId.make(HashMap.reduce(map, 0, (max, todo) => todo.id > max ? todo.id : max))
+        const id = TodoId.make(HashMap.reduce(map, -1, (max, todo) => todo.id > max ? todo.id : max) + 1)
         const todo = new Todo({ id, text, done: false })
         return [todo, HashMap.set(map, id, todo)]
       })
     }
 
-    function complete(id: number): Effect.Effect<Todo, TodoNotFound> {
+    function complete(id: TodoId): Effect.Effect<Todo, TodoNotFound> {
       return getById(id).pipe(
         Effect.map((todo) => new Todo({ ...todo, done: true })),
         Effect.tap((todo) => Ref.update(todos, HashMap.set(todo.id, todo)))
       )
     }
 
-    function remove(id: number): Effect.Effect<void, TodoNotFound> {
+    function remove(id: TodoId): Effect.Effect<void, TodoNotFound> {
       return getById(id).pipe(
         Effect.flatMap((todo) => Ref.update(todos, HashMap.remove(todo.id)))
       )