diff --git a/py.typed b/py.typed
deleted file mode 100644
index e69de29..0000000
diff --git a/pyproject.toml b/pyproject.toml
index 7c98f23..ec4378b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "maturin"
 
 [project]
 name = "teo"
-requires-python = ">=3.7"
+requires-python = ">=3.12"
 classifiers = [
     "Programming Language :: Rust",
     "Programming Language :: Python :: Implementation :: CPython",
diff --git a/teo/__init__.pyi b/teo/__init__.pyi
new file mode 100644
index 0000000..317e397
--- /dev/null
+++ b/teo/__init__.pyi
@@ -0,0 +1,26 @@
+class App:
+
+    def __init__(self):
+        """
+        Create a new app. Only one can be present in a program.
+        """
+
+    def main_namespace(self) -> Namespace:
+        """
+        Get the attached main namespace of the app.
+        """
+        pass
+
+    async def run(self):
+        """
+        Start the app.
+        """
+
+
+class Namespace:
+    """
+    Namespace is where handlers and models are defined.
+    """
+
+    def define_handler(self):
+        pass
\ No newline at end of file