diff --git a/qsl.toml b/qsl.toml
new file mode 100644
index 0000000..b36cfc5
--- /dev/null
+++ b/qsl.toml
@@ -0,0 +1,8 @@
+tier = "core"
+ring = 0
+allow_legacy = true
+
+[compat]
+bundle = "2026.07.0"
+requires = [
+]
diff --git a/tests/test_qsl_compat_metadata.py b/tests/test_qsl_compat_metadata.py
new file mode 100644
index 0000000..0441a02
--- /dev/null
+++ b/tests/test_qsl_compat_metadata.py
@@ -0,0 +1,12 @@
+from pathlib import Path
+import tomllib
+
+
+def test_qsl_compat_metadata_exists_and_bundle() -> None:
+    qsl_path = Path(__file__).resolve().parents[1] / "qsl.toml"
+    assert qsl_path.exists(), "qsl.toml missing"
+    with qsl_path.open("rb") as f:
+        data = tomllib.load(f)
+
+    assert data.get("compat", {}).get("bundle") == "2026.07.0", "compat.bundle mismatch"
+