McSib/e621_downloader ? reverse-engineered prompt

Build me a Rust command line tool that can download images and videos from e621 and e926 quickly and reliably.

I want it to handle single posts, multiple posts, pools, and artist or tag based downloads, using a simple text based input format that is easy to read and edit. It should save files into sensible folders, avoid downloading the same thing twice, and show clear progress while it runs. If a tag search is too large, it should limit itself the way the site allows and keep going instead of failing. It should also respect the site’s filter behavior when not logged in.

Make it easy to use from the terminal on Windows and Linux, and make sure it builds cleanly with Rust. If you need to look up current site or library docs online, go ahead. I’d like the code to feel solid and practical, not overcomplicated, so someone can use it for long running bulk downloads without babysitting it.