diff --git a/.jules/sentinel.md b/.jules/sentinel.md
new file mode 100644
index 0000000..127303b
--- /dev/null
+++ b/.jules/sentinel.md
@@ -0,0 +1,4 @@
+## 2025-04-18 - Remove Hardcoded Password
+**Vulnerability:** Hardcoded password found in test file comments (`tests/inference_test.py`).
+**Learning:** Even in test files, hardcoded credentials can expose sensitive information or be picked up by security scanners, creating false positives or actual risks if test passwords are reused.
+**Prevention:** Use environment variables (e.g., `ENCRYPTED_PDF_PASSWORD`) for all credentials, even in tests, to maintain a clean and secure codebase.
\ No newline at end of file
diff --git a/tests/inference_test.py b/tests/inference_test.py
index 62b9474..c335daf 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 is in ENCRYPTED_PDF_PASSWORD env var
     output_path = tmp_path / "output.pdf"
 
     with pytest.raises(commonforms.exceptions.EncryptedPdfError):