diff --git a/bun.lockb b/bun.lockb
index 977532e..cf49da4 100755
Binary files a/bun.lockb and b/bun.lockb differ
diff --git a/packages/example/package.json b/packages/example/package.json
index f9c93b6..4b15181 100644
--- a/packages/example/package.json
+++ b/packages/example/package.json
@@ -34,6 +34,9 @@
   },
   "dependencies": {
     "@effect/platform": "^0.73.1",
-    "@effect/platform-browser": "^0.52.1"
+    "@effect/platform-browser": "^0.52.1",
+    "@radix-ui/themes": "^3.1.6",
+    "@typed/id": "^0.17.1",
+    "mobx": "^6.13.5"
   }
 }
diff --git a/packages/example/src/domain/Todo.ts b/packages/example/src/domain/Todo.ts
index 5eb8474..0683a6e 100644
--- a/packages/example/src/domain/Todo.ts
+++ b/packages/example/src/domain/Todo.ts
@@ -1,19 +1,28 @@
 import { ThSchema } from "@thilawyn/thilaschema"
-import { Schema } from "effect"
+import { CuidState, DateTimes, GetRandomValues, makeCuid } from "@typed/id"
+import { Effect, Schema } from "effect"
 
 
 export class Todo extends Schema.Class<Todo>("Todo")({
+    _tag: Schema.tag("Todo"),
     id: Schema.String,
     content: Schema.String,
-    completedAt: Schema.DateTimeUtcFromSelf,
+    completedAt: Schema.OptionFromSelf(Schema.DateTimeUtcFromSelf),
 }) {}
 
 
 export const TodoFromJsonStruct = Schema.Struct({
     ...Todo.fields,
-    completedAt: Schema.DateTimeUtc,
+    completedAt: Schema.Option(Schema.DateTimeUtc),
 }).pipe(
     ThSchema.assertEncodedJsonifiable
 )
 
 export const TodoFromJson = TodoFromJsonStruct.pipe(Schema.compose(Todo))
+
+
+export const generateUniqueID = makeCuid.pipe(
+    Effect.provide(CuidState.layer("@reffuse/example")),
+    Effect.provide(GetRandomValues.CryptoRandom),
+    Effect.provide(DateTimes.Default),
+)
diff --git a/packages/example/src/main.tsx b/packages/example/src/main.tsx
index 1f4673e..715d6e6 100644
--- a/packages/example/src/main.tsx
+++ b/packages/example/src/main.tsx
@@ -3,7 +3,6 @@ import { ReffuseRuntime } from "@thilawyn/reffuse"
 import { Layer } from "effect"
 import { StrictMode } from "react"
 import { createRoot } from "react-dom/client"
-import "./index.css"
 import { GlobalContext } from "./reffuse"
 import { routeTree } from "./routeTree.gen"
 import { FetchData } from "./services"
diff --git a/packages/example/src/routes/__root.tsx b/packages/example/src/routes/__root.tsx
index b152a32..beef033 100644
--- a/packages/example/src/routes/__root.tsx
+++ b/packages/example/src/routes/__root.tsx
@@ -1,5 +1,8 @@
+import { Container, Flex, Theme } from "@radix-ui/themes"
+import "@radix-ui/themes/styles.css"
 import { createRootRoute, Link, Outlet } from "@tanstack/react-router"
 import { TanStackRouterDevtools } from "@tanstack/router-devtools"
+import "../index.css"
 
 
 export const Route = createRootRoute({
@@ -7,14 +10,18 @@ export const Route = createRootRoute({
 })
 
 function Root() {
-    return <>
-        <div className="container flex-row gap-2 justify-center items-center mx-auto mb-4">
-            <Link to="/">Index</Link>
-            <Link to="/time">Time</Link>
-            <Link to="/count">Count</Link>
-        </div>
+    return (
+        <Theme>
+            <Container>
+                <Flex direction="row" justify="center" align="center" gap="2">
+                    <Link to="/">Index</Link>
+                    <Link to="/time">Time</Link>
+                    <Link to="/count">Count</Link>
+                </Flex>
+            </Container>
 
-        <Outlet />
-        <TanStackRouterDevtools />
-    </>
+            <Outlet />
+            <TanStackRouterDevtools />
+        </Theme>
+    )
 }
diff --git a/packages/example/src/routes/index.tsx b/packages/example/src/routes/index.tsx
index 8e2bdad..6de5c78 100644
--- a/packages/example/src/routes/index.tsx
+++ b/packages/example/src/routes/index.tsx
@@ -1,6 +1,7 @@
 import { TodosContext } from "@/todos/reffuse"
 import { TodosState } from "@/todos/services"
 import { VTodos } from "@/todos/views/VTodos"
+import { Container } from "@radix-ui/themes"
 import { createFileRoute } from "@tanstack/react-router"
 import { Layer } from "effect"
 import { useMemo } from "react"
@@ -18,11 +19,11 @@ function Index() {
 
 
     return (
-        <div className="container mx-auto">
+        <Container>
             <TodosContext.Provider layer={todosLayer}>
                 <VTodos />
             </TodosContext.Provider>
-        </div>
+        </Container>
     )
 
 }
diff --git a/packages/example/src/todos/services/TodosState.ts b/packages/example/src/todos/services/TodosState.ts
index e683ddb..d9b2bea 100644
--- a/packages/example/src/todos/services/TodosState.ts
+++ b/packages/example/src/todos/services/TodosState.ts
@@ -2,16 +2,17 @@ import { Todo } from "@/domain"
 import { KeyValueStore } from "@effect/platform"
 import { BrowserKeyValueStore } from "@effect/platform-browser"
 import { PlatformError } from "@effect/platform/Error"
-import { Cause, Chunk, Context, Effect, identity, Layer, ParseResult, Ref, Schema, SubscriptionRef } from "effect"
+import { Chunk, Context, Effect, identity, Layer, ParseResult, Ref, Schema, SubscriptionRef } from "effect"
 
 
 export class TodosState extends Context.Tag("TodosState")<TodosState, {
     readonly todos: SubscriptionRef.SubscriptionRef<Chunk.Chunk<Todo.Todo>>
 
-    readonly readFromLocalStorage: Effect.Effect<void, Cause.NoSuchElementException | PlatformError | ParseResult.ParseError>
+    readonly readFromLocalStorage: Effect.Effect<void, PlatformError | ParseResult.ParseError>
     readonly saveToLocalStorage: Effect.Effect<void, PlatformError | ParseResult.ParseError>
 
     readonly prepend: (todo: Todo.Todo) => Effect.Effect<void>
+    readonly replace: (index: number, todo: Todo.Todo) => Effect.Effect<void>
     readonly remove: (index: number) => Effect.Effect<void>
     // readonly moveUp: (index: number) => Effect.Effect<void, Cause.NoSuchElementException>
     // readonly moveDown: (index: number) => Effect.Effect<void, Cause.NoSuchElementException>
@@ -30,6 +31,8 @@ export const make = (key: string) => Layer.effect(TodosState, Effect.gen(functio
         )),
         Effect.flatMap(v => Ref.set(todos, v)),
 
+        Effect.catchTag("NoSuchElementException", () => Ref.set(todos, Chunk.empty())),
+
         Effect.provide(BrowserKeyValueStore.layerLocalStorage),
     )
 
@@ -46,6 +49,7 @@ export const make = (key: string) => Layer.effect(TodosState, Effect.gen(functio
     )
 
     const prepend = (todo: Todo.Todo) => Ref.update(todos, Chunk.prepend(todo))
+    const replace = (index: number, todo: Todo.Todo) => Ref.update(todos, Chunk.replace(index, todo))
     const remove = (index: number) => Ref.update(todos, Chunk.remove(index))
 
     // const moveUp = (index: number) => Effect.gen(function*() {
@@ -59,6 +63,7 @@ export const make = (key: string) => Layer.effect(TodosState, Effect.gen(functio
         readFromLocalStorage,
         saveToLocalStorage,
         prepend,
+        replace,
         remove,
     }
 }))
diff --git a/packages/example/src/todos/views/VNewTodo.tsx b/packages/example/src/todos/views/VNewTodo.tsx
new file mode 100644
index 0000000..c454ff0
--- /dev/null
+++ b/packages/example/src/todos/views/VNewTodo.tsx
@@ -0,0 +1,52 @@
+import { Todo } from "@/domain"
+import { Box, Button, Card, Flex, TextArea } from "@radix-ui/themes"
+import { Effect, Option } from "effect"
+import { Reffuse } from "../reffuse"
+import { TodosState } from "../services"
+
+
+export function VNewTodo() {
+
+    const runSync = Reffuse.useRunSync()
+
+    const createEmptyTodo = Todo.generateUniqueID.pipe(
+        Effect.map(id => Todo.Todo.make({
+            id,
+            content: "",
+            completedAt: Option.none(),
+        }, true))
+    )
+
+    const todoRef = Reffuse.useRefFromEffect(createEmptyTodo)
+    const [todo, setTodo] = Reffuse.useRefState(todoRef)
+
+
+    return (
+        <Box>
+            <Card>
+                <Flex direction="column" align="stretch" gap="2">
+                    <TextArea
+                        value={todo.content}
+                        onChange={e => setTodo(
+                            Todo.Todo.make({ ...todo, content: e.target.value }, true)
+                        )}
+                    />
+
+                    <Flex direction="row" justify="center" align="center">
+                        <Button
+                            onClick={() => TodosState.TodosState.pipe(
+                                Effect.flatMap(state => state.prepend(todo)),
+                                Effect.flatMap(() => createEmptyTodo),
+                                Effect.map(setTodo),
+                                runSync,
+                            )}
+                        >
+                            Add
+                        </Button>
+                    </Flex>
+                </Flex>
+            </Card>
+        </Box>
+    )
+
+}
diff --git a/packages/example/src/todos/views/VTodo.tsx b/packages/example/src/todos/views/VTodo.tsx
index b34c96a..281bf27 100644
--- a/packages/example/src/todos/views/VTodo.tsx
+++ b/packages/example/src/todos/views/VTodo.tsx
@@ -1,5 +1,9 @@
 import { Todo } from "@/domain"
+import { Box, Card, Flex, Heading, TextArea } from "@radix-ui/themes"
+import { Effect } from "effect"
+import { useState } from "react"
 import { Reffuse } from "../reffuse"
+import { TodosState } from "../services"
 
 
 export interface VTodoProps {
@@ -10,12 +14,29 @@ export interface VTodoProps {
 export function VTodo({ index, todo }: VTodoProps) {
 
     const runSync = Reffuse.useRunSync()
+    const editorMode = useState(false)
 
 
     return (
-        <div className="">
+        <Box>
+            <Card>
+                <Flex direction="column" align="stretch" gap="1">
+                    <Heading>#{todo.id}</Heading>
 
-        </div>
+                    <TextArea
+                        value={todo.content}
+                        onChange={e => TodosState.TodosState.pipe(
+                            Effect.flatMap(state => state.replace(
+                                index,
+                                Todo.Todo.make({ ...todo, content: e.target.value }, true),
+                            )),
+                            runSync,
+                        )}
+                        disabled={!editorMode}
+                    />
+                </Flex>
+            </Card>
+        </Box>
     )
 
 }
diff --git a/packages/example/src/todos/views/VTodos.tsx b/packages/example/src/todos/views/VTodos.tsx
index b3cb2c6..a1aa3d6 100644
--- a/packages/example/src/todos/views/VTodos.tsx
+++ b/packages/example/src/todos/views/VTodos.tsx
@@ -1,6 +1,9 @@
-import { Effect, Stream } from "effect"
+import { Flex } from "@radix-ui/themes"
+import { Chunk, Effect, Stream } from "effect"
 import { Reffuse } from "../reffuse"
 import { TodosState } from "../services"
+import { VNewTodo } from "./VNewTodo"
+import { VTodo } from "./VTodo"
 
 
 export function VTodos() {
@@ -16,6 +19,18 @@ export function VTodos() {
     const [todos] = Reffuse.useRefState(todosRef)
 
 
-    return <></>
+    return (
+        <Flex direction="column" align="stretch" gap="3">
+            <VNewTodo />
+
+            {Chunk.map(todos, (todo, index) => (
+                <VTodo
+                    key={todo.id}
+                    index={index}
+                    todo={todo}
+                />
+            ))}
+        </Flex>
+    )
 
 }