AissistXL is a negative embedding fine-tuned to be working on Animagine XL v3 and its derivatives. It trained on the standard negative prompt for Animagine XL v3 plus some extra parameters to make sure you always generate the best possible images with Animagine-based models. You can also try to use this negative embedding for other SDXL-based models, but output quality is not guaranteed.
You don't necessarily need to use Animagine default negatives if you're using this negative embedding.
FAQ
Q: It's showing errors on AUTOMATIC1111, saying it's unsafe, and won't load the Embedding.
A: It's safe, it showing that error because the embedding still using .pt files. You can either put --disable-safe-unpickle on your AUTOMATIC1111 arguments, or download the .safetensors one I provided as "Embedding" (Negative is the .pt one).
Q: Will it work on Pony-based models?
A: Standalone? No. Combined with Pony-specific negative prompts? Maybe.
Q: If CagliostroLab releases a new Animagine XL version, will this negative embedding still work?
A: Yes.