ComfyUI refuses the WHOLE graph over one wrong value. v4 hit that with a LoRA
file that had been deleted: a feature that was switched off still stopped every
generation, and the message was "Prompt outputs failed validation" over a dozen
loaders. build() checked wiring and required-ness and never looked at a literal,
so check() called such a pipeline queueable.
A combo value that is not among the node choices, and a number outside the
bounds it declares, are now refused here -- naming the slot and the input.
No bounds means unknown, and unknown is not a refusal.
And when the queue does refuse one, its per-node reasons were captured by
run.js and never read: the status bar showed only the top-level string, because
describe() read `node` and the refusal path sets `nodes`.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
