Add nox sessions for building package & running mypy

noxfile.py

@@ -5,14 +5,14 @@
 
 
 @nox.session
-def tests(session):
+def tests(session: nox.Session) -> None:
     """Run tests with pytest."""
     session.install(".")
-    session.run("pytest")
+    session.run("pytest", *session.posargs)
 
 
 @nox.session
-def docs(session):
+def docs(session: nox.Session) -> None:
     """Build documentation with Sphinx."""
     session.install(".")
     session.run(
@@ -21,4 +21,29 @@ def docs(session):
         "docs/build/html",
         "--builder",
         "html",
+        *session.posargs,
     )
+
+
+@nox.session
+def build(session: nox.Session) -> None:
+    """Build & verify the source distribution and wheel."""
+    session.install("twine", "build")
+    build_command = ("python", "-m", "build")
+    session.run(*build_command, "--sdist")
+    session.run(*build_command, "--wheel")
+    session.run("twine", "check", "dist/*")
+
+
+@nox.session
+def mypy(session: nox.Session) -> None:
+    """Perform static type checking with mypy."""
+    MYPY_COMMAND: tuple[str, ...] = (
+        "mypy",
+        ".",
+        "--show-error-context",
+        "--show-error-code-links",
+        "--pretty",
+    )
+    session.install(".")
+    session.run(*MYPY_COMMAND, *session.posargs)