String Binary Condition JK🐉

Numbers get compared constantly; strings usually don't. But ComfyUI workflows end up carrying strings - model names, prompt fragments, file stems, metadata - and sometimes the branch you want is literally "is this the one." CM_StringBinaryCondition_JK does exactly two comparisons on two string inputs, a and b: Eq (equal) and Neq (not equal). Output is a BOOLEAN.

When comparing strings matters

• Model or LoRA name routing. A loader outputs a model name string; you want different sampler settings for "sd_xl_base" vs "flux1-dev". Eq against the known name drives the switch.
• Mode detection. If some upstream node hands you a mode string ("canny", "depth", "pose"), an Eq check replaces a manual toggle - the workflow chooses its own path.
• Empty/not-empty checks. Compare against an empty string to detect "nothing was provided," which is the string-world version of a boolean.
• Fallback logic. "If this prompt equals the placeholder, use the real one instead."

Because the output is a proper boolean, it chains with the pack's Bool And/OR gates - "the model is X and the mode is Y" is two comparisons and one AND.

The honest caveats

• It's case-sensitive. "Canny" and "canny" are not equal. If upstream nodes aren't consistent about casing, normalize first or you'll be debugging a false branch.
• Whitespace counts. Trailing spaces and line breaks from multiline inputs will break Eq in ways that are hard to see. If you're comparing against a literal, keep the inputs trimmed.
• It's not "contains". This node is equality, not substring search. For "does the name contain 'fp8'", you'd need a different utility - this one is deliberately strict.

Installing it

Ships with ComfyUI-JakeUpgrade:

cd ComfyUI/custom_nodes
git clone https://github.com/jakechai/ComfyUI-JakeUpgrade
cd ComfyUI-JakeUpgrade
# Windows standalone: install.bat
# or: python_embeded\python.exe -s -m pip install -r requirements.txt
pip install -r requirements.txt   # non-Windows

Or ComfyUI Manager, search "JakeUpgrade", install, restart. Nothing to download.

Gotchas

• Case and whitespace are the two silent killers. Compare exactly what the upstream produces, not what you think it produces - a Show Text node is the debugging friend here.
• Manager's JakeUpgrade / IPAdapter_plus conflict warning is a false positive from the pack's replacement/ folder.
• ComfyUI-MultiGPU causes CUDA errors with recent ComfyUI - disable it per the README.