patch to handle Z terminating time stamps for Python3.10 compatibility

plugins/resolve_md/plugin.py

@@ -217,6 +217,9 @@ def get_git_last_updated(file_path: str, has_git: bool = True) -> str:
             )
             ts = result.stdout.strip()
             if ts:
+                # Python 3.10 fromisoformat() doesn't accept 'Z'; normalize to +00:00
+                if ts.endswith("Z"):
+                    ts = ts[:-1] + "+00:00"
                 return datetime.fromisoformat(ts).astimezone(timezone.utc).isoformat()
         except (subprocess.SubprocessError, OSError):
             pass

tests/resolve_md/test_resolve_md.py

@@ -2,6 +2,7 @@
 import os
 import tempfile
 from pathlib import Path
+from unittest.mock import patch
 
 import yaml
 
@@ -148,6 +149,13 @@ def test_returns_iso_timestamp_for_tracked_file(self):
         assert ts, "Expected a non-empty timestamp"
         assert "T" in ts, "Expected ISO-8601 format with a T separator"
 
+    def test_handles_z_suffix_on_python310(self):
+        """Timestamps ending with 'Z' are normalised so Python 3.10 can parse them."""
+        mock_result = type("R", (), {"stdout": "2026-03-09T14:16:33Z", "returncode": 0})()
+        with patch("plugins.resolve_md.plugin.subprocess.run", return_value=mock_result):
+            ts = ResolveMDPlugin.get_git_last_updated(__file__)
+        assert ts == "2026-03-09T14:16:33+00:00"
+
     def test_falls_back_for_untracked_file(self):
         """An untracked temp file falls back to filesystem mtime."""
         with tempfile.NamedTemporaryFile(suffix=".md", delete=False) as f: