Added a .pyi stub file to type inspection with pylance

pyproject.toml

@@ -5,7 +5,7 @@ requires = [ "setuptools", "wheel" ]
 
 [project]
 name = "cunumpy"
-version = "0.1"
+version = "0.1.1"
 description = "Simple wrapper for numpy and cupy. Replace `import numpy as np` with `import cunumpy as xp`."
 readme = "README.md"
 keywords = [ "python" ]
@@ -48,3 +48,6 @@ urls."Source" = "https://github.com/max-models/cunumpy"
 
 [tool.setuptools.packages.find]
 where = [ "src" ]
+
+[tool.setuptools.package-data]
+cunumpy = [ "py.typed", "*.pyi" ]

src/cunumpy/__init__.pyi

@@ -0,0 +1,7 @@
+# Stub file for Pylance/mypy: exposes all numpy symbols so that
+# `import cunumpy as xp` followed by `xp.<Tab>` shows numpy completions.
+# At runtime the real __init__.py dispatches to numpy or cupy via __getattr__.
+from numpy import *
+from numpy import __config__, __version__
+
+from . import xp

tests/unit/test_app.py

@@ -1,3 +1,5 @@
+import numpy as np
+
 import cunumpy as xp
 
 
@@ -9,5 +11,16 @@ def test_xp_array():
     print(f"{arr = } {type(arr) = }")
 
 
+def test_numpy_symbols_accessible():
+    """All public numpy symbols must be reachable via cunumpy.
+
+    This validates the runtime behaviour that the stub file (__init__.pyi)
+    declares to Pylance so that `xp.<Tab>` shows numpy completions in VS Code.
+    """
+    missing = [name for name in np.__all__ if not hasattr(xp, name)]
+    assert missing == [], f"Symbols not accessible via cunumpy: {missing}"
+
+
 if __name__ == "__main__":
     test_xp_array()
+    test_numpy_symbols_accessible()