YCSwitch(any)

If you've used Impact Pack, ImpactSwitch is your mental model. YCSwitch is the same idea, ported into this pack: connect any number of inputs - input1, input2, and so on, slots appearing as you connect them - set select to an integer, and the node passes through only that input. Any type, no converting everything to strings first. It'll switch a MODEL, a CLIP, a prompt string, an image, whatever. That's its whole personality.

How it works

The secret sauce is the Impact Pack's AnyType trick: a string subclass whose __ne__ always returns False, so the frontend never rejects a wire as "wrong type." New input slots spawn lazily as you connect, and because the inputs are lazy, only the selected one actually gets evaluated - branches you don't pick don't run. select is 1-based, and the node also hands back the selected slot's label and its index.

• Inputs: select (INT), sel_mode (BOOLEAN), and input1 through inputN (ANY).
• Outputs: selected_value (ANY), selected_label (STRING), selected_index (INT).

The sel_mode toggle is the only thing that'll make you think: select_on_execution (default) chooses dynamically at run time; select_on_prompt resolves the choice before execution, which is the compatibility path for older ComfyUI versions that can't handle the dynamic behavior.

When you'd use it

A/B testing two prompts or two LoRA paths in one graph, routing around a broken branch without deleting it, or a single dial to flip between source images. It's a workhorse, not a party trick - the kind of node that quietly lives in a workflow and makes it feel like a real tool.

Two gotchas. If select points at a slot with nothing connected, you get None out and a log line - wire it before you switch it. And because lazy evaluation skips unselected branches, don't use it to "pre-warm" nodes you expect to run; anything downstream of an unselected branch simply doesn't execute.

Installing

Same pack, same two lines:

cd ComfyUI/custom_nodes
git clone https://github.com/yichengup/ComfyUI-YCNodes_Toolkit

Restart (or ComfyUI Manager → search "ComfyUI-YCNodes_Toolkit"). Only numpy and Pillow behind it, no models. If you already have Impact Pack installed you don't strictly need this node - but it's here, it works the same way, and it keeps your graph inside one pack.