diff --git a/pyproject.toml b/pyproject.toml
index 2b4ba42..e5768c4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -119,3 +119,6 @@ package-dir = { "" = "src" }
 where = ["src"]
 include = ["thechart*"]
 exclude = ["tests*"]
+
+[tool.setuptools.package-data]
+thechart = ["py.typed"]
diff --git a/src/thechart/main.py b/src/thechart/main.py
new file mode 100644
index 0000000..0c88a1f
--- /dev/null
+++ b/src/thechart/main.py
@@ -0,0 +1,8 @@
+"""Package proxy to the development entry module.
+
+This makes `thechart.main` importable while keeping the app in `src/main.py`.
+"""
+
+from __future__ import annotations
+
+from src.main import *  # noqa: F401,F403
diff --git a/src/thechart/managers.py b/src/thechart/managers.py
new file mode 100644
index 0000000..132a8d6
--- /dev/null
+++ b/src/thechart/managers.py
@@ -0,0 +1,12 @@
+"""Aggregate re-exports for thechart managers.
+
+Keeps external imports simple (e.g., `from thechart.managers import DataManager`) while
+preserving the current src layout.
+"""
+
+from __future__ import annotations
+
+from src.data_manager import DataManager  # noqa: F401
+from src.medicine_manager import Medicine, MedicineManager  # noqa: F401
+from src.pathology_manager import PathologyManager  # noqa: F401
+from src.ui_manager import UIManager  # noqa: F401
diff --git a/src/thechart/py.typed b/src/thechart/py.typed
new file mode 100644
index 0000000..e69de29