Warn on prompt inputs that match no declared node input

Keys in a node's inputs that do not match any declared required or
optional input were silently dropped, with no log entry, error, or
history record. Diff the received input keys against the declared
ones after building valid_inputs and log a warning naming the node
and the ignored keys.

Author: chelsealong

execution.py

@@ -895,6 +895,10 @@ async def validate_inputs(prompt_id, prompt, item, validated, visiting=None):
 
     valid_inputs = set(class_inputs.get('required',{})).union(set(class_inputs.get('optional',{})))
 
+    unknown_inputs = set(inputs) - valid_inputs
+    if unknown_inputs:
+        logging.warning(f"Node {unique_id} ({class_type}): ignoring unknown input(s) {', '.join(sorted(unknown_inputs))}")
+
     for x in valid_inputs:
         input_type, input_category, extra_info = get_input_info(obj_class, x, class_inputs)
         assert extra_info is not None

tests-unit/execution_test/validate_inputs_unknown_test.py

@@ -0,0 +1,39 @@
+import asyncio
+import logging
+
+from comfy.cli_args import args as cli_args
+
+cli_args.cpu = True
+
+import nodes  # noqa: E402
+import execution  # noqa: E402
+
+
+class StubNodeForUnknownInputTest:
+    @classmethod
+    def INPUT_TYPES(cls):
+        return {"required": {"a": ("INT", {})}}
+
+    RETURN_TYPES = ()
+    FUNCTION = "go"
+    CATEGORY = "test"
+
+    def go(self, a):
+        return ()
+
+
+def test_unknown_input_is_warned_and_ignored(monkeypatch, caplog):
+    monkeypatch.setitem(nodes.NODE_CLASS_MAPPINGS, "StubNodeForUnknownInputTest", StubNodeForUnknownInputTest)
+    prompt = {
+        "1": {
+            "class_type": "StubNodeForUnknownInputTest",
+            "inputs": {"a": 1, "ref_audios": {"ref_audio_0": ["2", 0]}},
+        }
+    }
+
+    with caplog.at_level(logging.WARNING):
+        valid, errors, node_id = asyncio.run(execution.validate_inputs("test-prompt", prompt, "1", {}))
+
+    assert valid
+    assert errors == []
+    assert any("ref_audios" in record.message for record in caplog.records)