diff --git a/custom_components/bahmcloud_store/const.py b/custom_components/bahmcloud_store/const.py
new file mode 100644
index 0000000..85bcc09
--- /dev/null
+++ b/custom_components/bahmcloud_store/const.py
@@ -0,0 +1,11 @@
+"""Constants for Bahmcloud Store."""
+
+from __future__ import annotations
+
+DOMAIN = "bahmcloud_store"
+
+# Fixed store index URL (not user-configurable).
+DEFAULT_STORE_URL = "https://git.bahmcloud.de/bahmcloud/ha_store/raw/branch/main/store.yaml"
+
+# Config entry option keys
+CONF_GITHUB_TOKEN = "github_token"