Hello Sylvain,
> What do you think of this proposal, in particular performing the same
> p7zip->7zip transition as trixie in earlier, stable releases?
It's a good idea for keeping 7z archiver more secure.
But it might needs some fixups to replace from p7zip to 7zip.
1. Current 7-Zip uses asmc-linux for amd64 assembly code. So, you
needs to port asmc-linux to older stable releases.
https://tracker.debian.org/pkg/asmc-linux
Bookworm has the backport package.
Or, just drop assembly code from 7zip. See build rules file for 7zip.
https://salsa.debian.org/debian/7zip/-/blob/debian/25.01+dfsg-5/debian/rules?ref_type=tags#L9
2. CLI output text is something different between p7zip and 7zip. You
needs some fixup patch that other packages accepts 7zip.
Checkout p7zip-7zip transition bug report list to take those fixups info.
https://bugs.debian.org/cgi-bin/pkgreport.cgi?archive=both;include=subject%3A7zip;submitter=cacin%40allfreemail.net
--
YOKOTA Hiroshi