This workflow is what I use to save metadata to my images with ComfyUI. It requires a few custom nodes, including ComfyUI Essentials and my own Flux Prompt Saver node.

If the nodes appear red in the graph, it means you do not have the custom nodes installed. Please check out ComfyUI Manager for the best way to manage custom node installation.

Note that this node does require you to manually select the checkpoint and will not capture additional networks (LoRAs). It captures the prompt and basic information like the sampler, steps, seed, size, etc. This takes advantage of the Flux Sampler Parameters node from Essentials which replaces the standard Ksampler or SamplerCustomAdvanced.

Please feel free to leave questions in the comments, but comments like "it doesn't work" are not constructive and don't give me enough information to help you troubleshoot. I highly recommend you instead join my Discord at https://thebulge.xyz