Although digikam is a great DAM (I would say quite a bit better then the DAM of darktable or rawtherapee although those are workable) the RAW processor still isn’t that great. So it would be nice if digikam had a bit more options to work with external programs that handle RAW themselves.
Since “open with” already works and the batch queue has the possibility to run shell scripts the only option missing there is to skip RAW processing and feed the RAW file directly to the script (both darktable and rawtherapee have cli only versions). The only thing missing then is to mark this output as a new ‘version’ and/or ‘thumbnail’ for the RAW file (albeit grouping is an ok workaround for now). Another more extensive suggestion can be found in this bug 374655 – Working with raw processors
Anyway thanks for your hard work!