diff --git a/.npmrc b/.npmrc
new file mode 100644
index 0000000..93f962e
--- /dev/null
+++ b/.npmrc
@@ -0,0 +1 @@
+@thilawyn:registry=https://git.jvalver.de/api/packages/thilawyn/npm/
diff --git a/bun.lockb b/bun.lockb
index 87e2e98..ac6a6e8 100755
Binary files a/bun.lockb and b/bun.lockb differ
diff --git a/bunfig.toml b/bunfig.toml
new file mode 100644
index 0000000..bb40fbe
--- /dev/null
+++ b/bunfig.toml
@@ -0,0 +1,2 @@
+[install.scopes]
+"@thilawyn" = "https://git.jvalver.de/api/packages/thilawyn/npm/"
diff --git a/package.json b/package.json
index e995c57..8e9f209 100644
--- a/package.json
+++ b/package.json
@@ -4,6 +4,8 @@
   "private": true,
   "workspaces": ["packages/*"],
   "devDependencies": {
+    "npm-check-updates": "^16.14.20",
+    "npm-sort": "^0.0.4",
     "typescript": "^5.5.2"
   }
 }
diff --git a/packages/common/package.json b/packages/common/package.json
index 16fcc2a..2b908bb 100644
--- a/packages/common/package.json
+++ b/packages/common/package.json
@@ -1,5 +1,13 @@
 {
   "name": "@todo-tests/common",
   "type": "module",
-  "private": true
+  "exports": {
+    "./data": "./src/data/index.ts"
+  },
+  "private": true,
+  "dependencies": {
+    "@effect/schema": "^0.68.12",
+    "@thilawyn/thilalib": "^0.1.3",
+    "effect": "^3.4.5"
+  }
 }
diff --git a/packages/common/src/data/Todo.ts b/packages/common/src/data/Todo.ts
new file mode 100644
index 0000000..d3bb435
--- /dev/null
+++ b/packages/common/src/data/Todo.ts
@@ -0,0 +1,16 @@
+import { Schema as S } from "@effect/schema"
+import { Tag } from "@thilawyn/thilalib/effect/schema"
+import { Class } from "@thilawyn/thilalib/effect/schema/class"
+
+
+export class Todo extends Class<Todo>("Todo")({
+    _tag:       Tag("Todo"),
+
+    id:         S.String,
+    title:      S.String,
+    content:    S.String,
+
+    due:        S.optional(S.DateFromSelf, { as: "Option" }),
+    createdAt:  S.DateFromSelf,
+    updatedAt:  S.DateFromSelf,
+}) {}
diff --git a/packages/common/src/data/index.ts b/packages/common/src/data/index.ts
new file mode 100644
index 0000000..d5dbbf5
--- /dev/null
+++ b/packages/common/src/data/index.ts
@@ -0,0 +1 @@
+export * from "./Todo"
diff --git a/packages/server/package.json b/packages/server/package.json
index 7076209..7039a46 100644
--- a/packages/server/package.json
+++ b/packages/server/package.json
@@ -6,6 +6,8 @@
     "@effect/platform": "^0.58.12",
     "@effect/platform-bun": "^0.38.11",
     "@effect/schema": "^0.68.11",
+    "@thilawyn/thilalib": "^0.1.3",
+    "@todo-tests/common": "workspace:*",
     "effect": "^3.4.4"
   }
 }
diff --git a/packages/server/src/Todos.ts b/packages/server/src/Todos.ts
new file mode 100644
index 0000000..9da8fc5
--- /dev/null
+++ b/packages/server/src/Todos.ts
@@ -0,0 +1,5 @@
+import type { Todo } from "@todo-tests/common/data"
+import { Context, Ref } from "effect"
+
+
+export class Todos extends Context.Tag("Todos")<Todos, Ref.Ref<Todo[]>>() {}
diff --git a/packages/server/src/index.ts b/packages/server/src/index.ts
new file mode 100644
index 0000000..f76c65a
--- /dev/null
+++ b/packages/server/src/index.ts
@@ -0,0 +1,36 @@
+import { BunRuntime } from "@effect/platform-bun"
+import { Todo } from "@todo-tests/common/data"
+import { Array, Effect, Option, Ref } from "effect"
+import { Todos } from "./Todos"
+
+
+const createDefaultTodos = Todos.pipe(
+    Effect.flatMap(ref =>
+        Ref.update(ref, todos =>
+            Array.appendAll(todos, [
+                new Todo({
+                    id: "1",
+                    title: "A test todo",
+                    content: "Lorem ipsum",
+                    due: Option.none(),
+                    createdAt: new Date(),
+                    updatedAt: new Date(),
+                })
+            ])
+        )
+    )
+)
+
+
+const main = Effect.gen(function*() {
+    yield* createDefaultTodos
+
+    const todos = yield* Todos
+    console.log(yield* Ref.get(todos))
+})
+
+const runnableMain = main.pipe(
+    Effect.provideServiceEffect(Todos, Ref.make(Array.empty()))
+)
+
+BunRuntime.runMain(runnableMain)