Guider Input Switch JK🐉

Flux and its modern friends don't use a plain CFG scale the way SD15 did - they use a guider, a separate little model that shapes guidance, and you sometimes want two of them on tap. Guider Input Switch JK🐉 routes between two GUIDER wires based on a boolean, so swapping guidance strategy is a toggle.

It's a member of the "Noise | Guider | Sampler | Sigmas" switch set Jake added in v1.5.0 when the pack's Flux workflows landed - alongside the samplers and sigmas switches that make a Flux KSampler graph reconfigurable without touching its guts. If you've got a Flux workflow with a standard guider and a "double guidance" or distilled guidance variant, this is the clean way to choose.

How it works

The standard switch core:

if guider_true is not None and boolean_value:
    return (guider_true, boolean_value)
else:
    return (guider_false, boolean_value)

• boolean_value - True → the "true" guider, False → the "false" one.
• guider_false - required.
• guider_true - optional; unplugged = pass-through.

Outputs: guider_output (GUIDER) and boolean.

The GUIDER type is what the advanced sampler stack expects - Flux's guidance model, the CFG-zero-star or distilled guiders, whatever your sampler setup constructs. As with all these switches, both guiders still get constructed every run; the switch only decides which one the sampler receives. Since guiders are small (a guidance model, not the main UNet), the extra cost is negligible.

Where you'd use it

• Flux workflows: standard guider vs a low-guidance variant, toggled to compare quality and speed.
• A "loose vs strict" master toggle where the guider choice is part of it.
• In JakeUpgrade's own Flux KSampler group nodes, which wire guidance through sub-graphs - the switch is how those stay toggleable.

It's niche - you only meet it if you've already gone down the advanced-sampler rabbit hole, which is exactly the audience that will appreciate not rebuilding the graph to compare guiders.

Install

Ships with ComfyUI-JakeUpgrade. ComfyUI Manager → search ComfyUI-JakeUpgrade, or:

cd ComfyUI/custom_nodes
git clone https://github.com/jakechai/ComfyUI-JakeUpgrade
cd ComfyUI-JakeUpgrade && pip install -r requirements.txt

No models of its own. Menu: 🐉 JK/🔀 Switch. Pack-level notes as usual: the IPAdapter Plus conflict warning from Manager is harmless replacement-folder noise, and switch nodes can be toggled off via ENABLED_MODULES in config.ini if you ever want a leaner palette.