first cut at teckids2brief class but typearea is not yet proper

teckids2brief.cls

+% Dokumentklasse „Brief 2.0“ für den Teckids e.V.
+%
+% Copyright © 2015, 2017, 2018, 2019, 2024
+%	Thorsten Glaser <thorsten.glaser@teckids.org>
+% Copyright © 2013
+%	Dominik George <nik@naturalnet.de>
+%
+% Provided that these terms and disclaimer and all copyright notices
+% are retained or reproduced in an accompanying document, permission
+% is granted to deal in this work without restriction, including un‐
+% limited rights to use, publicly perform, distribute, sell, modify,
+% merge, give away, or sublicence.
+%
+% This work is provided “AS IS” and WITHOUT WARRANTY of any kind, to
+% the utmost extent permitted by applicable law, neither express nor
+% implied; without malicious intent or gross negligence. In no event
+% may a licensor, author or contributor be held liable for indirect,
+% direct, other damage, loss, or other issues arising in any way out
+% of dealing in the work, even if advised of the possibility of such
+% damage or existence of a defect, except proven that it results out
+% of said person’s immediate fault when using the work as intended.
+
+\NeedsTeXFormat{LaTeX2e}%
+\ProvidesClass{teckids2brief}[2024/06/11 0.1 Teckids letter TeX/LaTeX class, second epoch]%
+
+\PassOptionsToPackage{paper=a4,BCOR=6pt}{typearea}%
+%\PassOptionsToPackage{paper=a4,BCOR=6pt,DIV=13}{typearea}%
+\RequirePackage{fancyhdr}%
+\LoadClass[paper=a4,
+ fromalign=right,
+ fromphone=on,
+ locfield=wide,
+ fontsize=10pt,
+ parskip=half,
+ refline=narrow,
+ pagenumber=headright,
+ headsepline=on]{scrlttr2}%
+\RequirePackage{teckids2style}%
+\RequirePackage{array}%
+\RequirePackage{tabularx}%
+\LoadLetterOption{teckids2ltr}%

teckids2ltr.lco

+\hypersetup{colorlinks = false}%
+\teckidsgeometry[margin=2cm]%
+%\recalctypearea%
+% note: not in teckids2style as some pubmats use P for RaggedRight
+\newcolumntype{P}[1]{>{\centering\arraybackslash}p{#1}}%
+
+\setkomavar{signature}{XXX signature unset XXX}% ← set in each letter!
+
+\newkomavar{fromstreet}%
+\newkomavar{fromdistrict}%
+\newkomavar{fromco}%
+
+\setkomavar{fromname}{Teckids e.V.}%
+\setkomavar{fromstreet}{Kennedyallee 18}%
+\setkomavar{fromdistrict}{53175 Bonn}%
+\setkomavar{fromemail}{\emaillink{verein@teckids.org}}%
+\setkomavar{fromphone}{+49 228 9293416‒0}%
+\setkomavar{fromfax}{+49 228 9293416‒9}%
+\setkomavar{fromurl}{https://www.teckids.org/}%
+
+\setkomavar{backaddressseparator}{ \textperiodcentered\  }%
+\setkomavar{fromaddress}{\usekomavar{fromstreet}\usekomavar[\\]{fromdistrict}}%
+\setkomavar{fromlogo}{\includegraphics[height=60pt]{teckids_logo}}%
+\setkomavar{location}{\begin{tabular}[t]{@{}rl}
+\Letter & \usekomavar{fromname} \\
+& \usekomavar{fromstreet} \\
+& \usekomavar{fromdistrict} \\
+\Telefon & \usekomavar{fromphone} \\
+\Faxmachine & \usekomavar{fromfax} \\
+\MVAt & \usekomavar{fromemail} \\
+\Info & \usekomavar{fromurl} \\
+\end{tabular}}%
+
+\setkomavar{firsthead}{\hfill\usekomavar{fromlogo}}%
+
+\setkomavar{firstfoot}{%
+ \parbox[t]{\textwidth}{\footnotesize%
+\begin{tabularx}{\linewidth}[t]{@{}p{.75\linewidth} P{.25\linewidth}}
+  Vereinsregister Amtsgericht Bonn · VR 9846\newline
+  Vorstand: Dominik George, Tom Teichler, Benedict Suska\newline
+  Stadtsparkasse KölnBonn · IBAN: \mbox{DE31 3705 0198 1933 0485 46} · BIC: \mbox{COLSDE33XXX}\newline
+  Anerkannt als gemeinnützig beim Finanzamt Bonn-Außenstadt\newline
+  Steuernummer 206/5879/1026 · USt-ID: DE313359560
+ &
+  Unterstützt durch:
+
+  \vspace{\baselineskip}%
+  \includegraphics[height=3\baselineskip]{logo_informatik-aktuell}%
+\end{tabularx}}%
+}%
+
+\@addtoplength{firstfootvpos}{-1cm}%
+\@addtoplength{firstheadvpos}{0.5cm}%
+\@setplength{sigbeforevskip}{1.5ex}