I'm the developer of a renowned DAM software for Windows. I also use the awesome Affinity Designer personally.
My software supports over 100 file formats so far. I would like to add extended support for files created with Affinity Designer and Affinity Photo to my software.
Is there any documentation available for the .afdesign and .afphoto file formats?
I'm especially interested in ways to render a suitable preview / thumbnail of your files, and in reading and writing metadata.