Unsure on how initial tagging with afew is supposed to work

[Christoffer Stjernlöf]

Hello!

I have the following contents in ~/.config/afew/config:

    # This is the default filter chain
    [SpamFilter]
    [ClassifyingFilter]
    [KillThreadsFilter]
    [ListMailsFilter]
    [ArchiveSentMailsFilter]
    [Filter.1]
    query = 'tag:killed and tag:new'
    tags = -unread
    message = marking killed new email as read
    [InboxFilter]

My expectation is that this will remove the "unread" tag from messages
that are also tagged "killed". This does not happen – I can find several
recent messages which are tagged both with "killed" and "unread".

Why is this a problem? Two reasons!

1. Messages with the "unread" tag reside in the new/ directory
physically on the file system, which causes my "you have unread email"
alert to go off, and

2. I'd like to understand how to configure automatic tagging with
afew. For example, the OpenBSD mailing list is just tagged "misc" by the
default afew tagger, and I'd love to switch this to "openbsd-misc" or
something.

How can I accomplish what I expect to be able to?

Regards,
Christoffer