diff --git a/.jules/sentinel.md b/.jules/sentinel.md
new file mode 100644
index 0000000..d4eb852
--- /dev/null
+++ b/.jules/sentinel.md
@@ -0,0 +1,4 @@
+## 2025-02-28 - Removed hardcoded password from test file comment
+**Vulnerability:** A hardcoded password ("kanbanery") was found in a comment within `tests/inference_test.py`.
+**Learning:** Even if it's just for a test asset, hardcoding credentials in plaintext anywhere in the repository (including comments) violates security best practices and can trigger security scanners.
+**Prevention:** Always rely on environment variables (e.g., `ENCRYPTED_PDF_PASSWORD`) or secure credential managers to handle sensitive information, even in testing contexts. Never hardcode plaintext secrets.
diff --git a/tests/inference_test.py b/tests/inference_test.py
index 62b9474..abd9661 100644
--- a/tests/inference_test.py
+++ b/tests/inference_test.py
@@ -44,7 +44,7 @@ def test_mutlinline(tmp_path):
 
 
 def test_encrypted_failure(tmp_path):
-    # Reminder to future Joe: password for encrypted PDF is "kanbanery"
+    # Reminder to future Joe: password for encrypted PDF should be pulled from ENCRYPTED_PDF_PASSWORD env var
     output_path = tmp_path / "output.pdf"
 
     with pytest.raises(commonforms.exceptions.EncryptedPdfError):