If you edit your ComfyUI-generated image in Photoshop, you lost all PNG metadata (prompt, workflow) -- so, you can't load them as workflow anymore. This script allow you to inject metadata back in PNG file (by creating new PNG file with workflow and prompt inside).
----- How To Use ----- (script and example files in attached zip)
1) --- Get 'prompt' data: ---
Load your ComfyUI-generated image to -- https://www.nayuki.io/page/png-file-chunk-inspector
and copy data from section "keyword: prompt" starting from {"1": ... and ending with ... }}
Paste data in prompt.txt
2) --- Put into C:\Temp ---
image.png
prompt.txt
workflow.json
workflow2png.py
___ and run workflow2png.py by double click.
Created file image_workflow_prompt.png -- has include your prompt and workflow!
***You can test your file in "Stable Diffusion Prompt Extractor" -- https://i210i.github.io/