Debug Extra

ComfyUI silently hands every node two things you never see: extra_pnginfo (the whole workflow graph) and prompt (the exact values that executed). Debug Extra is a window onto both. It dumps them as pretty-printed strings, along with a filtered per-node summary of widget values, so you can finally see what the backend actually sent - not what you think it sent.

Honest framing: this is a developer's tool, and the target audience is people writing custom nodes or debugging why a workflow misbehaves. If that's not you, it's still worth one look, because the "state" output is exactly what Batch State hashes under the hood - this node is the microscope, Batch State is the measuring tape.

How it works

It declares the hidden extra_pnginfo and prompt inputs, then pretty-prints them. The third output is the interesting one: it walks the workflow graph and builds a dictionary of each node's widget values, naming entries like Type(title).node_id so you can tell which node is which. Nodes whose type contains Debug, Show, Function, or Evaluate are skipped - same filter Batch State uses - so debug plumbing doesn't clutter the dump. It marks IS_CHANGED to NaN, forcing a re-run on every queue so the output reflects the current run rather than a cached one.

The outputs

• extra_pnginfo - the full workflow graph: nodes, positions, links, properties. Big, and honest about it.
• prompt - the executed prompt dictionary: each node's id mapped to the values that actually ran.
• state - the filtered per-node widget-value summary described above.

All three are STRING, so wire them into a text display node (like ShowText) or a text saver to actually read them.

Where you'd use it

• Custom node dev. If your node reads widget values from the prompt and they're not what you expect, dump prompt and see exactly what shape the data is in.
• Workflow forensics. Why did that KSampler use seed X? What did the frontend send for this node's title? It's all in there.
• Verifying connections. The state output shows resolved values per node, which makes it obvious when a widget is actually a wire reference rather than a typed number.

Gotchas

• The outputs are verbose, and extra_pnginfo can be genuinely huge on a big workflow. Read them in a text node with a scrollbar, not a one-line preview.
• It's a debugging aid, not a workflow component. Nothing about it is wrong, but a graph you share doesn't need it, and the dumps will keep changing on every queue.

Install

Via ComfyUI Manager, search "hus' utils" (pack title: hus' utils for ComfyUI). Or manually:

cd ComfyUI/custom_nodes
git clone https://github.com/hustille/ComfyUI_hus_utils

Restart ComfyUI. No requirements.txt, no pip step, no model downloads - pure Python standard library, so there's nothing to break and nothing to audit beyond the few hundred lines of source.