diff --git a/crates/post/scripts/stacked_cores.py b/crates/post/scripts/stacked_cores.py
new file mode 100644
index 0000000..6320194
--- /dev/null
+++ b/crates/post/scripts/stacked_cores.py
@@ -0,0 +1,46 @@
+def load_csv(path: str):
+    """
+    returns (header: list[str], rows: list[list[T]])
+    """
+    header = []
+    rows = []
+    for i, line in enumerate(open(path).read().strip().split('\n')):
+        if i == 0:
+            header = line.split(',')
+        else:
+            rows.append(eval(line))
+    return header, rows
+
+def labeled_rows(header: list, rows: list):
+    """
+    return a list of dicts,
+    transforming each row into a kv map
+    """
+    new_rows = []
+    for row in rows:
+        new_rows.append({ header[i]: elem for i, elem in enumerate(row) })
+    return new_rows
+
+def last_row_before_t(rows: list, t: float):
+    """
+    return the last row for which row[time] < t
+    """
+    prev_row = None
+    for row in rows:
+        if row["time"] >= t:
+            break
+        prev_row = row
+    return prev_row
+
+
+def extract_m(row: dict) -> list:
+    """
+    return [M(state0), M(state1), ...]
+    """
+    m = []
+    for k, v in row.items():
+        if k.startswith('M(state') and k.endswith(')'):
+            n = int(k[len('M(state'):-1])
+            assert n == len(m)
+            m.append(v)
+    return m
diff --git a/crates/post/scripts/stacked_cores_8xx.py b/crates/post/scripts/stacked_cores_8xx.py
index f8ca6ef..2824a03 100755
--- a/crates/post/scripts/stacked_cores_8xx.py
+++ b/crates/post/scripts/stacked_cores_8xx.py
@@ -5,52 +5,7 @@ to extract higher-level info from them.
 """
 import sys
 
-def load_csv(path: str):
-    """
-    returns (header: list[str], rows: list[list[T]])
-    """
-    header = []
-    rows = []
-    for i, line in enumerate(open(path).read().strip().split('\n')):
-        if i == 0:
-            header = line.split(',')
-        else:
-            rows.append(eval(line))
-    return header, rows
-
-def labeled_rows(header: list, rows: list):
-    """
-    return a list of dicts,
-    transforming each row into a kv map
-    """
-    new_rows = []
-    for row in rows:
-        new_rows.append({ header[i]: elem for i, elem in enumerate(row) })
-    return new_rows
-
-def last_row_before_t(rows: list, t: float):
-    """
-    return the last row for which row[time] < t
-    """
-    prev_row = None
-    for row in rows:
-        if row["time"] >= t:
-            break
-        prev_row = row
-    return prev_row
-
-
-def extract_m(row: dict) -> list:
-    """
-    return [M(state0), M(state1), ...]
-    """
-    m = []
-    for k, v in row.items():
-        if k.startswith('M(state') and k.endswith(')'):
-            n = int(k[len('M(state'):-1])
-            assert n == len(m)
-            m.append(v)
-    return m
+from stacked_cores import load_csv, labeled_rows, last_row_before_t, extract_m
 
 def extract_8xx(path: str):
     header, raw_rows = load_csv(path)