ChaiNNer predates Stable Diffusion and most of the AI craze. Its origins are in the GameUpscale community, where people were hacking and finetuning ESRGAN for 1x img2img (among other things).<p>Its super cool and easy, and deeply under appreciated.
There is already an AI framework named Chainer: <a href="https://github.com/chainer/chainer">https://github.com/chainer/chainer</a>