  The architecting of Systems of Systems (SoS), that is, of systems that emerge
from the cooperation of multiple independent constituent systems, is a topic of
increasing interest in both industry and academia. However, recent empirical
studies revealed what seems to be an overlooked aspect of the architecting of
SoS that is linked to major integration and operational issues: the interplay
between the various disciplines involved in such an architecting process. This
aspect becomes particularly relevant for the management of the interfaces
between the SoS constituents, where such disciplines inevitably meet. In this
paper, we present the results of the first cycle of a Technical Action Research
(TAR) study conducted in cooperation between the authors and a group of
practitioners involved in the long-running architecting process of a
large-scale radio astronomy SoS project. This TAR is aimed at exploring
potential improvements of the document-centered interface management approach
currently followed in this project by adopting elements of the
\textit{documentation-as-code} philosophy, which is widely adopted in the
domain of software systems. As a result, a working proof-of-concept of an ICD
(Interface Control Document) management approach was developed by the
researchers and evaluated by the practitioners. The results of the study and
the corresponding lessons learned are reported in this work.
