alucryd/oxyromon 0.21.0 on GitHub

Features

Added sorting options for arcade systems
Added -e/--extension flag to import-dats for setting custom extensions on original ROMs in the system
Added support for exporting Dreamcast Redump images to GDI format in export-roms (based on gdidrop, credits to feyris-tan)
Added -d/--delete flag to import-roms for hard deletion of unmatched and duplicate ROMs (alternative to --trash)
Added -s/--save flag to download-dats for optionally saving downloaded DAT files to a specified directory
Added purge system buttons in the frontend
Added automatic detection of CHD parents in import-roms, provided they are in the same directory
Added a romfiles card to the frontend
Added new purge-irds subcommand to unassociate games from IRD files
Moved invalid/duplicate ROM files in subdirectories of the Trash directory in import-roms
Appended the first computed checksum to the trashed ROM filenames in import-roms
Added an SSE endpoint for sending events to the web UI

Retired the hash algorithm override in import-roms
Repurposed the -a flag in import-roms to import files as-is (now supports non-original formats in DAT files)
Improved ROM matching in unattended mode using similarity scoring
Rewrote the frontend using Svelte/Flowbite
Expanded on the -u flag of import-roms, now provides 2 options: skip (default) and first

Fixed an infinite loop when importing DAT files containing invalid parent references
Fixed playlist names for games having stuff after the disc number
Fixed JB folder game completion
Fixed simultaneously importing ROM files that are shared between 2 or more systems (e.g. Commodore Amiga and Atari ST)
Fixed importing of empty files, they are now ignored in import-roms and automatically created when a partial game needs them for completion