ComfyUI runs a V3 node's validate_inputs during the prompt validation, where
the links are not resolved yet: a connected pack arrives as None (after the
list unwrapping) or as the (None,) marker of a missing link. Both nodes
rejected that unresolved pack, so every prompt failed with the same error
once per input.
- validate_inputs now accepts an unresolved pack and only refuses a value
that is present but of the wrong type.
- execute raises the actionable error for a pack that is really wrong
(the plan already requires execute to raise instead of returning None).
- the shared message lives in src/keep_model_loader.keep_model_pack_error.
- tests cover the unresolved pack (None and (None,)) and the raising execute.
Verified against the real ComfyUI validation path: execution.get_input_data
with a linked pack returns (None,) and validate_inputs now returns True.
WildAi
726da45f65