Fix non-link input cache signature

comfy_execution/caching.py

@@ -68,19 +68,20 @@ _FAILED_SIGNATURE = object()
 
 
 def _shallow_is_changed_signature(value):
-    """Sanitize execution-time `is_changed` values without deep recursion."""
+    """Sanitize execution-time `is_changed` values with a small fail-closed budget."""
     value_type = type(value)
     if value_type in _PRIMITIVE_SIGNATURE_TYPES:
         return value
+
+    canonical = to_hashable(value, max_nodes=64)
+    if type(canonical) is Unhashable:
+        return canonical
+
     if value_type is list or value_type is tuple:
-        try:
-            items = tuple(value)
-        except RuntimeError:
-            return Unhashable()
-        if all(type(item) in _PRIMITIVE_SIGNATURE_TYPES for item in items):
-            container_tag = "is_changed_list" if value_type is list else "is_changed_tuple"
-            return (container_tag, items)
-    return Unhashable()
+        container_tag = "is_changed_list" if value_type is list else "is_changed_tuple"
+        return (container_tag, canonical[1])
+
+    return canonical
 
 
 def _primitive_signature_sort_key(obj):

tests-unit/execution_test/caching_test.py

@@ -353,11 +353,26 @@ def test_shallow_is_changed_signature_accepts_primitive_lists(caching_module):
     assert sanitized == ("is_changed_list", (1, "two", None, True))
 
 
-def test_shallow_is_changed_signature_fails_closed_on_nested_containers(caching_module):
-    """Nested containers from `is_changed` should be rejected immediately."""
+def test_shallow_is_changed_signature_accepts_structured_builtin_fingerprint_lists(caching_module):
+    """Structured built-in `is_changed` fingerprints should remain representable."""
     caching, _ = caching_module
 
-    sanitized = caching._shallow_is_changed_signature([1, ["nested"]])
+    sanitized = caching._shallow_is_changed_signature([("seed", 42), {"cfg": 8}])
+
+    assert sanitized == (
+        "is_changed_list",
+        (
+            ("tuple", ("seed", 42)),
+            ("dict", (("cfg", 8),)),
+        ),
+    )
+
+
+def test_shallow_is_changed_signature_fails_closed_for_opaque_payload(caching_module):
+    """Opaque `is_changed` payloads should still fail closed."""
+    caching, _ = caching_module
+
+    sanitized = caching._shallow_is_changed_signature([_OpaqueValue()])
 
     assert isinstance(sanitized, caching.Unhashable)