Add initial Ty configuration file (#13843)

Author: AA-Turner

pyproject.toml

@@ -132,6 +132,7 @@ types = [
     "mypy==1.17.1",
     "pyrefly",
     "pyright==1.1.400",
+    "ty",
     { include-group = "type-stubs" },
 ]
 type-stubs = [

ty.toml

@@ -0,0 +1,21 @@
+# Configuration file for Ty_.
+# n.b. Ty is early in development.
+#      Sphinx's current primary/reference type-checker is mypy.
+#
+# .. _Ty: https://docs.astral.sh/ty/
+
+[src]
+include = [
+    "doc/conf.py",
+    "doc/development/tutorials/examples/autodoc_intenum.py",
+    "doc/development/tutorials/examples/helloworld.py",
+    "sphinx",
+    "tests",
+    "utils",
+]
+exclude = [
+    "tests/roots/test-pycode/cp_1251_coded.py",  # Not UTF-8
+    # This panics (2025-08-18; ty 0.0.1-alpha.18).
+    # See https://github.com/astral-sh/ty/issues/256
+    "tests/test_config/test_config.py",
+]