Shima Placeholder Tuple

Let me save you some time: the Shima Placeholder Tuple is a stub, and I'd read the word "placeholder" in its name literally. It types its single output as SDXL_TUPLE but the actual data it hands you is a tuple of strings built by splitting a hardcoded repr of some long-dead debug session. If you wire that into a real SDXL pipeline you'll get garbage or a crash, not a usable tuple.

The SDXL_TUPLE type comes from the older Efficiency Nodes / "Efficient Loader" family - it's a pipe that carries (model, clip, positive conditioning, negative conditioning) down one wire so you don't drag four cables across the graph. The Shima pack ships its own more modern equivalent, the BNDL bundle system, and the SDXL_TUPLE compatibility layer here is clearly a legacy leftover. This node's only optional input is allow_external_linking (the island broadcast toggle), and its output is named SDXL_TUPLE.

What it actually does

The execute method returns tuple(provided_tuple_string.split(", ")) where provided_tuple_string is a giant literal string pasted into the source - a repr of a (ModelPatcher, CLIP, [[tensor…]], [[tensor…]], None, None, None, None) object from a session that probably ran on someone's Windows box years ago. So you get a Python tuple of strings. It has the right type label for ComfyUI's type checker but none of the right content. It cannot be un-tupled into real model, clip, and conditioning objects.

What to use instead

If you need a real pass-through for an SDXL tuple, use Shima SDXL Tuple Pass, which returns the exact tuple you fed it. If you want to build an SDXL pipeline from scratch, use the pack's own bundle generators (Model Citizen, Master Prompt, Latent Maker) and a ReBNDLer. The Placeholder Tuple looks like it was meant as a template node - "here's what an SDXL tuple looks like" - and never got finished or deleted.

Install

It's part of the one-pack install:

cd ComfyUI/custom_nodes
git clone https://github.com/KDB-USJP/shima_wf.git Shima
pip install -r requirements.txt

Restart and it appears under Shima/Utilities/Passers. ComfyUI Manager users can just search "Shima". The pack's heavier companions - ComfyUI-Impact-Pack and cg-use-everywhere - are auto-cloned by the installer on first boot because the island system depends on Use Everywhere; that's normal.

Bottom line

Don't build anything on this node. It exists, it registers, and it's probably harmless if you leave it sitting on a canvas as a documentation artifact - but the honest answer to "what does it do" is "produces placeholder text with an SDXL_TUPLE label." If you need the real thing, reach for SdxlTuplePass or the BNDL packers. It's a good reminder that even polished packs ship dead code, and that a type label in ComfyUI is a promise the node may not keep.