fix(package): ship Python inline type metadata

AGENTS.md

@@ -34,6 +34,7 @@ This repository owns the published `elydora` package, its CLI, synchronous and a
 ## Code Quality
 
 - Keep the package, distribution, and CLI version in `elydora/_version.py`; build metadata must read that literal through Setuptools dynamic metadata.
+- Ship `elydora/py.typed` in every wheel and verify public annotations from an installed-wheel consumer.
 - Support every Python version declared in `pyproject.toml`.
 - Keep production source files at or below 500 lines.
 - Keep functions focused on one ownership boundary.

elydora/py.typed

@@ -0,0 +1 @@
+

pyproject.toml

@@ -42,5 +42,8 @@ dev = [
 [tool.setuptools.packages.find]
 include = ["elydora*"]
 
+[tool.setuptools.package-data]
+elydora = ["py.typed"]
+
 [tool.setuptools.dynamic]
 version = {attr = "elydora._version.__version__"}

tests/test_typing_distribution.py

@@ -0,0 +1,8 @@
+from importlib.resources import files
+
+
+def test_package_declares_inline_type_information() -> None:
+    marker = files("elydora").joinpath("py.typed")
+
+    assert marker.is_file()
+    assert marker.read_text(encoding="utf-8").strip() == ""