diff --git a/migration/zerodev1_command_clump_Gate2F_If.sh b/migration/zerodev1_command_clump_Gate2F_If.sh
new file mode 100644
index 0000000..f60ead1
--- /dev/null
+++ b/migration/zerodev1_command_clump_Gate2F_If.sh
@@ -0,0 +1,56 @@
+#!/usr/bin/bash
+#
+#
+#
+# Gate 2F Life Field Acceptance If_4_lines 30 seconds
+# zerodev1 CPP Command clump START
+date
+cd /usr/local/src/ble-reticulum/
+chronyc tracking
+chronyc sources -v
+echo .
+
+cd migration/protocol_core
+python3 setup.py build_ext --inplace
+cd ../..
+
+PYTHONPATH=src:migration/protocol_core \
+BLE_RETICULUM_SESSION_BACKEND=cpp \
+BLE_RETICULUM_FRAGMENTATION_BACKEND=cpp \
+python3 - <<'PY'
+import os, sys
+print("PYTHON:", sys.executable)
+print("PYTHONPATH:", os.environ.get("PYTHONPATH"))
+print("BLE_RETICULUM_SESSION_BACKEND:", os.environ.get("BLE_RETICULUM_SESSION_BACKEND"))
+print("BLE_RETICULUM_FRAGMENTATION_BACKEND:", os.environ.get("BLE_RETICULUM_FRAGMENTATION_BACKEND"))
+import ble_protocol_core_cpp
+print("ble_protocol_core_cpp:", ble_protocol_core_cpp.__file__)
+from ble_reticulum.BLEFragmentationBackend import BACKEND as FRAG_BACKEND
+from ble_reticulum.BLESessionBackend import BACKEND as SESSION_BACKEND
+print("fragmentation backend:", FRAG_BACKEND)
+print("session backend:", SESSION_BACKEND)
+if FRAG_BACKEND != "cpp":
+    raise SystemExit(f"ERROR: expected fragmentation backend cpp, got {FRAG_BACKEND!r}")
+if SESSION_BACKEND != "cpp":
+    raise SystemExit(f"ERROR: expected session backend cpp, got {SESSION_BACKEND!r}")
+print("CPP backend preflight: OK")
+PY
+
+echo .
+
+PYTHONPATH=src:migration/protocol_core \
+BLE_RETICULUM_SESSION_BACKEND=cpp \
+BLE_RETICULUM_FRAGMENTATION_BACKEND=cpp \
+BLE_RETICULUM_FRAGMENTATION_BACKEND_REPORT=1 \
+timeout 30 python3 examples/ble_dual_node_echo.py \
+  --ble-role peripheral \
+  --message-file /usr/local/src/ble-reticulum/samples/If.txt \
+  --message-chunk-size 900 \
+  --announce-only-when-disconnected \
+  --verbosity debug
+
+echo .
+chronyc tracking
+chronyc sources -v
+# zerodev1 Command clump END  for  Gate 2F Life Field Acceptance If_4_lines 30 seconds
+
diff --git a/migration/zerodev2_command_clump_Gate2F_If.sh b/migration/zerodev2_command_clump_Gate2F_If.sh
new file mode 100644
index 0000000..1b313ac
--- /dev/null
+++ b/migration/zerodev2_command_clump_Gate2F_If.sh
@@ -0,0 +1,56 @@
+#!/usr/bin/bash
+#
+#
+#
+
+#  Gate 2F Life Field Acceptance If_4_lines 30 seconds
+# zerodev2 CPP Command clump START
+date
+cd /usr/local/src/ble-reticulum/
+chronyc tracking
+chronyc sources -v
+echo .
+
+cd migration/protocol_core
+python3 setup.py build_ext --inplace
+cd ../..
+
+PYTHONPATH=src:migration/protocol_core \
+BLE_RETICULUM_SESSION_BACKEND=cpp \
+BLE_RETICULUM_FRAGMENTATION_BACKEND=cpp \
+python3 - <<'PY'
+import os, sys
+print("PYTHON:", sys.executable)
+print("PYTHONPATH:", os.environ.get("PYTHONPATH"))
+print("BLE_RETICULUM_SESSION_BACKEND:", os.environ.get("BLE_RETICULUM_SESSION_BACKEND"))
+print("BLE_RETICULUM_FRAGMENTATION_BACKEND:", os.environ.get("BLE_RETICULUM_FRAGMENTATION_BACKEND"))
+import ble_protocol_core_cpp
+print("ble_protocol_core_cpp:", ble_protocol_core_cpp.__file__)
+from ble_reticulum.BLEFragmentationBackend import BACKEND as FRAG_BACKEND
+from ble_reticulum.BLESessionBackend import BACKEND as SESSION_BACKEND
+print("fragmentation backend:", FRAG_BACKEND)
+print("session backend:", SESSION_BACKEND)
+if FRAG_BACKEND != "cpp":
+    raise SystemExit(f"ERROR: expected fragmentation backend cpp, got {FRAG_BACKEND!r}")
+if SESSION_BACKEND != "cpp":
+    raise SystemExit(f"ERROR: expected session backend cpp, got {SESSION_BACKEND!r}")
+print("CPP backend preflight: OK")
+PY
+
+echo .
+
+PYTHONPATH=src:migration/protocol_core \
+BLE_RETICULUM_SESSION_BACKEND=cpp \
+BLE_RETICULUM_FRAGMENTATION_BACKEND=cpp \
+BLE_RETICULUM_FRAGMENTATION_BACKEND_REPORT=1 \
+timeout 30 python3 examples/ble_dual_node_echo.py \
+  --ble-role both \
+  --message-file  /usr/local/src/ble-reticulum/samples/If.txt \
+  --peer 926e6d3b35b7d5940be7edeb47c41b78 \
+  --announce-only-when-disconnected \
+  --verbosity debug
+
+echo .
+chronyc tracking
+chronyc sources -v
+# zerodev2 Command clump END