Add projects to shared tag discovery

tests/test_project_sources.py

@@ -17,6 +17,7 @@ from project_sources import (  # noqa: E402
     metadata_digest,
     parse_record,
     split_list,
+    taxonomy_label_items,
     validate_image,
     validate_url,
 )
@@ -61,6 +62,12 @@ class ProjectSourceTests(unittest.TestCase):
             with self.assertRaises(RepositoryNotPublicError):
                 fetch_json("https://git.example.test/api/repo", require_public=True)
 
+    def test_unapproved_labels_remain_visible_without_becoming_tags(self) -> None:
+        items = taxonomy_label_items(
+            ["TypeScript", "Unlisted Tool"], ["typescript"]
+        )
+        self.assertEqual(items, ["typescript\tTypeScript", "-\tUnlisted Tool"])
+
 
 if __name__ == "__main__":
     unittest.main()