Ihor Radchenko <yantar92@posteo.net> writes:

> Andrew Hyatt <ahyatt@gmail.com> writes:
>
>>> Still, I do not mind adding customization to enable it during startup,
>>> similar to the existing customizations:
>>> `org-agenda-start-with-log-mode',
>>> `org-agenda-start-with-entry-text-mode',
>>> `org-agenda-start-with-follow-mode', etc.
>>
>> Thank you, that makes sense.  I've attached the patch.
>
> Thank you!
>
>> From 4eee33856af687564a522ab40ebed4ba5d848cf4 Mon Sep 17 00:00:00 2001
>> From: Andrew Hyatt <ahyatt@gmail.com>
>> Date: Sun, 28 Jan 2024 21:33:20 -0400
>> Subject: [PATCH] Add org-agenda-start-with-archives-mode
>
> May you please also add a proper commit message? See
> https://orgmode.org/worg/org-contribute.html#commit-messages
>
>> +(defcustom org-agenda-start-with-archives-mode nil
>> +  "Initial value of archive-mode in a newly created agenda window."
>> +  :group 'org-agenda-startup
>> +  :type 'boolean)
>
> Please add :package-version '(Org . "9.7") keyword to indicate when the
> new option is added.
>
> Also, please add an entry in etc/ORG_NEWS file and document the new
> option in the manual (11.5 Commands in the Agenda Buffer display section)

Thanks for the pointers; it's been years since my last contribution.
I've attached the latest patch.