Can't escape characters in Scan syntax and other regex issues

[Sirver51]

Can't use backslash ("") to escape characters in the regex provided to the scanning tool because they get converted to forward slashes ("/"), thereby invalidating the regex. For example:

/content/{re:"\[.*\]"}/

Results in:

[CommandError|120]: Command(166) has failed with: [ScanError|130]: [Errno 2] No such file or directory: '//content/{re:"/[.*/]"}'

The regex engine being used also seems to lack convenience tokens like /w and /W, and there doesn't seem to be a way to specify which part of the match should be taken as the collection/series/gallery token. For example, if I have:

/content/
    [<artist>] <series>/
        [<artist>] <chapter_name_1>.zip
        [<artist>] <chapter_name_2>.zip
        [<artist>] <chapter_name_3>.zip

The actual galleries are going to have the artist parsed as <artist> because it's in the name, but how do I get the series/grouping name to be <series> instead of [<artist>] <series>?

Environment:

• OS: Ubuntu Server 22.04
• Browser: Chrome 105.0.5195.54
• HPX Version: 0.13.3 (client: 0.13.1)

Additional context
Installed via docker-compose.