From 47db84ebfb47f82bfe3ebb3d78cb13d4bc9a91a3 Mon Sep 17 00:00:00 2001
From: Jason Wen <haibin.wen3@gmail.com>
Date: Wed, 2 Sep 2026 01:28:43 -0400
Subject: [PATCH] models: add big model ONNX hash tracking (#1982)

---
 openpilot/sunnypilot/models/default_model.py  | 14 ++++++++++
 .../sunnypilot/models/tests/big_model_hash    |  1 +
 .../models/tests/test_default_model.py        | 27 ++++++++++++++++++-
 3 files changed, 41 insertions(+), 1 deletion(-)
 create mode 100644 openpilot/sunnypilot/models/tests/big_model_hash

diff --git a/openpilot/sunnypilot/models/default_model.py b/openpilot/sunnypilot/models/default_model.py
index e3c9360835..84e962cdcd 100755
--- a/openpilot/sunnypilot/models/default_model.py
+++ b/openpilot/sunnypilot/models/default_model.py
@@ -20,7 +20,9 @@ def get_default_model() -> str:
 
 DEFAULT_MODEL_NAME_PATH = os.path.join(BASEDIR, "openpilot", "sunnypilot", "models", "model_name.py")
 MODEL_HASH_PATH = os.path.join(BASEDIR, "openpilot", "sunnypilot", "models", "tests", "model_hash")
+BIG_MODEL_HASH_PATH = os.path.join(BASEDIR, "openpilot", "sunnypilot", "models", "tests", "big_model_hash")
 SUPERCOMBO_ONNX_PATH = os.path.join(BASEDIR, "openpilot", "selfdrive", "modeld", "models", "driving_supercombo.onnx")
+BIG_SUPERCOMBO_ONNX_PATH = os.path.join(BASEDIR, "openpilot", "selfdrive", "modeld", "models", "big_driving_supercombo.onnx")
 
 
 def update_model_hash():
@@ -32,6 +34,18 @@ def update_model_hash():
 
   print(f"Generated and updated new combined model hash to {MODEL_HASH_PATH}")
 
+  if os.path.exists(BIG_SUPERCOMBO_ONNX_PATH):
+    import subprocess
+    rel = os.path.relpath(BIG_SUPERCOMBO_ONNX_PATH, os.getcwd())
+    pointer = subprocess.check_output(["git", "show", f"HEAD:{rel}"], text=True)
+    oid = next(l.split(":", 1)[1] for l in pointer.splitlines() if l.startswith("oid sha256:"))
+    big_combined_hash = hashlib.sha256(oid.encode()).hexdigest()
+
+    with open(BIG_MODEL_HASH_PATH, "w") as f:
+      f.write(big_combined_hash)
+
+    print(f"Generated and updated new big model hash to {BIG_MODEL_HASH_PATH}")
+
 
 def get_ref_for_name(url: str, name: str) -> str:
   response = requests.get(url, timeout=10)
diff --git a/openpilot/sunnypilot/models/tests/big_model_hash b/openpilot/sunnypilot/models/tests/big_model_hash
new file mode 100644
index 0000000000..e957940fdd
--- /dev/null
+++ b/openpilot/sunnypilot/models/tests/big_model_hash
@@ -0,0 +1 @@
+8bba37156aa17d49210cad028744c839ea9ed7b1f19428a8ecfafdc1e07a73b6
\ No newline at end of file
diff --git a/openpilot/sunnypilot/models/tests/test_default_model.py b/openpilot/sunnypilot/models/tests/test_default_model.py
index b72c2b4c89..c322d3b699 100644
--- a/openpilot/sunnypilot/models/tests/test_default_model.py
+++ b/openpilot/sunnypilot/models/tests/test_default_model.py
@@ -5,12 +5,25 @@ This file is part of sunnypilot and is licensed under the MIT License.
 See the LICENSE.md file in the root directory for more details.
 """
 
+import os
+import subprocess
+
 from openpilot.sunnypilot import get_file_hash
-from openpilot.sunnypilot.models.default_model import MODEL_HASH_PATH, SUPERCOMBO_ONNX_PATH
+from openpilot.sunnypilot.models.default_model import MODEL_HASH_PATH, SUPERCOMBO_ONNX_PATH, BIG_MODEL_HASH_PATH, \
+                                                      BIG_SUPERCOMBO_ONNX_PATH
 import hashlib
 from openpilot.common.test import OpenpilotTestCase
 
 
+def _get_lfs_oid(path: str) -> str:
+  """Extract the LFS OID (SHA256 of actual content) from git, works whether the file is smudged or not."""
+  pointer = subprocess.check_output(["git", "show", f"HEAD:{path}"], text=True)
+  for line in pointer.splitlines():
+    if line.startswith("oid sha256:"):
+      return line.split(":", 1)[1]
+  raise ValueError(f"No LFS OID found for {path}")
+
+
 class TestDefaultModel(OpenpilotTestCase):
   def test_compare_onnx_hashes(self):
     supercombo_hash = get_file_hash(SUPERCOMBO_ONNX_PATH)
@@ -21,3 +34,15 @@ class TestDefaultModel(OpenpilotTestCase):
       current_hash = f.read().strip()
 
     assert combined_hash == current_hash, "Run openpilot/sunnypilot/models/default_model.py to update the default model name and hash"
+
+  def test_compare_big_onnx_hashes(self):
+    if not os.path.exists(BIG_SUPERCOMBO_ONNX_PATH):
+      self.skipTest("big_driving_supercombo.onnx not present")
+
+    oid = _get_lfs_oid(os.path.relpath(BIG_SUPERCOMBO_ONNX_PATH, os.getcwd()))
+    combined_hash = hashlib.sha256(oid.encode()).hexdigest()
+
+    with open(BIG_MODEL_HASH_PATH) as f:
+      current_hash = f.read().strip()
+
+    assert combined_hash == current_hash, "Run openpilot/sunnypilot/models/default_model.py to update the default model name and hash"