diff --git a/.codecov.yml b/.codecov.yml
new file mode 100644
index 000000000..a46517f21
--- /dev/null
+++ b/.codecov.yml
@@ -0,0 +1,21 @@
+# Codecov configuration for NOAA-GFDL/fre-cli
+# Reference: https://docs.codecov.com/docs/codecovyml-reference
+
+coverage:
+  status:
+    project:
+      default:
+        target: auto
+        threshold: 1%
+        if_ci_failed: error
+
+    patch:
+      default:
+        target: 50%          # Minimum coverage for new code
+        threshold: 1%        # Allow 1% decrease
+        if_ci_failed: error
+
+comment:
+  layout: "header, diff, flags, components, files, footer"
+  behavior: default
+  require_changes: false
diff --git a/fre/pp/ppval_script.py b/fre/pp/ppval_script.py
index 1a886ecb3..89893bc23 100644
--- a/fre/pp/ppval_script.py
+++ b/fre/pp/ppval_script.py
@@ -39,38 +39,77 @@ def getenot(date_start: str, date_end:str, chunk_type:str, cal: str):
     #start/end are cf datetime objects representing the start and end time of the data chunk
     #diff represents the time difference between start and stop
     if chunk_type == 'yearly':
-        enot = int(date_end[1]) - int(date_start[1])+ 1
+        enot = int(date_end[1]) - int(date_start[1]) + 1
 
     elif chunk_type == 'monthly':
-        enot = (int(date_end[1]) * 12 + int(date_end[2])) - (int(date_start[1]) * 12 + int(date_start[2]))+ 1
+        enot = (int(date_end[1]) * 12 + int(date_end[2])) - (int(date_start[1]) * 12 + int(date_start[2])) + 1
 
     elif chunk_type == 'daily':
-        start = cftime.datetime(int(date_start[1]),int(date_start[2].lstrip('0')),int(date_start[3].lstrip('0')),calendar = cal)
-        end = cftime.datetime(int(date_end[1]),int(date_end[2].lstrip('0')),int(date_end[3].lstrip('0')),calendar = cal)
+        start = cftime.datetime(int(date_start[1]),
+                                int(date_start[2].lstrip('0')),
+                                int(date_start[3].lstrip('0')),
+                                calendar = cal)
+        end =   cftime.datetime(int(date_end[1]),
+                                int(date_end[2].lstrip('0')),
+                                int(date_end[3].lstrip('0')),
+                                calendar = cal)
         diff = end - start
         enot = diff.days + 1
 
     elif chunk_type == '4xdaily':
-        start = cftime.datetime(int(date_start[1]),int(date_start[2].lstrip('0')),int(date_start[3].lstrip('0')), hour = int(date_start[4]),calendar = cal)
-        end = cftime.datetime(int(date_end[1]),int(date_end[2].lstrip('0')),int(date_end[3].lstrip('0')), hour = int(date_end[4]),calendar = cal)
+        start = cftime.datetime(int(date_start[1]),
+                                int(date_start[2].lstrip('0')),
+                                int(date_start[3].lstrip('0')),
+                                hour = int(date_start[4]),
+                                calendar = cal)
+        end =   cftime.datetime(int(date_end[1]),
+                                int(date_end[2].lstrip('0')),
+                                int(date_end[3].lstrip('0')),
+                                hour = int(date_end[4]),
+                                calendar = cal)
         diff = end - start
         enot = (diff.days + 1) * 4
 
     elif chunk_type == '8xdaily':
-        start = cftime.datetime(int(date_start[1]),int(date_start[2].lstrip('0')),int(date_start[3].lstrip('0')), hour = int(date_start[4]),calendar = cal)
-        end = cftime.datetime(int(date_end[1]),int(date_end[2].lstrip('0')),int(date_end[3].lstrip('0')), hour = int(date_end[4]),calendar = cal)
+        start = cftime.datetime(int(date_start[1]),
+                                int(date_start[2].lstrip('0')),
+                                int(date_start[3].lstrip('0')),
+                                hour = int(date_start[4]),
+                                calendar = cal)
+        end =   cftime.datetime(int(date_end[1]),
+                                int(date_end[2].lstrip('0')),
+                                int(date_end[3].lstrip('0')),
+                                hour = int(date_end[4]),
+                                calendar = cal)
         diff = end - start
         enot = (diff.days + 1) * 8
 
     elif chunk_type == 'hourly':
-        start = cftime.datetime(int(date_start[1]),int(date_start[2].lstrip('0')),int(date_start[3].lstrip('0')), hour = int(date_start[4]),calendar = cal)
-        end = cftime.datetime(int(date_end[1]),int(date_end[2].lstrip('0')),int(date_end[3].lstrip('0')), hour = int(date_end[4]),calendar = cal)
+        start = cftime.datetime(int(date_start[1]),
+                                int(date_start[2].lstrip('0')),
+                                int(date_start[3].lstrip('0')),
+                                hour = int(date_start[4]),
+                                calendar = cal)
+        end =   cftime.datetime(int(date_end[1]),
+                                int(date_end[2].lstrip('0')),
+                                int(date_end[3].lstrip('0')),
+                                hour = int(date_end[4]),
+                                calendar = cal)
         diff = end - start
         enot = (diff.days + 1) * 24
 
     elif chunk_type == '30minute':
-        start = cftime.datetime(int(date_start[1]),int(date_start[2].lstrip('0')),int(date_start[3].lstrip('0')), hour = int(date_start[4]),calendar = cal)
-        end = cftime.datetime(int(date_end[1]),int(date_end[2].lstrip('0')),int(date_end[3].lstrip('0')), hour = int(date_end[4]), minute = int(date_end[5]),calendar = cal)
+        start = cftime.datetime(int(date_start[1]),
+                                int(date_start[2].lstrip('0')),
+                                int(date_start[3].lstrip('0')),
+                                hour = int(date_start[4]),
+                                calendar = cal)
+        end =   cftime.datetime(int(date_end[1]),
+                                int(date_end[2].lstrip('0')),
+                                int(date_end[3].lstrip('0')),
+                                hour = int(date_end[4]),
+                                minute = int(date_end[5]),
+                                calendar = cal)
         diff = end - start
         enot = (diff.days + 1) * 48