feat(loop): port run_loop.sh to Python lib_py.loop with thin wrapper and strict parser (Phase 3)

.agents/skills/lib_py/loop/__main__.py

@@ -0,0 +1,7 @@
+"""Entrypoint for `python3 -m lib_py.loop`."""
+
+import sys
+from lib_py.loop import runner
+
+if __name__ == "__main__":
+    sys.exit(runner.main())