arcAI42: Documenting Intelligence as Architecture

We’re excited to invite you to an upcoming meetup in April 2026 with the DataMonsters.io Microsoft Data Platform Rhineland Regional Group!

arcAI42: Documenting Intelligence as Architecture

arc42 has given us a precise and disciplined way to document software architecture — but AI systems behave fundamentally differently. They don’t stay static. They learn, drift, depend heavily on data quality, and make probabilistic decisions. Yet today, we still document them as if they were ordinary code components. And that’s where things break.

In real projects, we see the same recurring problems: invisible data dependencies, unclear assumptions, models no one can explain, domain language drifting away from training data, unpredictable deployments, missing ownership, and no architectural place to describe feedback loops, retraining logic, or drift mitigation. When these elements aren’t captured architecturally, AI systems become unmaintainable and impossible to govern.

arcAI42 introduces a small set of lightweight extensions to arc42 that make these learning systems architecturally visible. It adds a Data and Domain Context that describes data sources and meaning, a Model Context that explains model assumptions and provides transparency into model behavior, a Lifecycle & Feedback View that shows how a model evolves, and a Governance & Risk section that captures drift, bias, ownership, and mitigation strategies. It also clarifies how models are tested, deployed, monitored, and rolled back.

In essence, arcAI42 transforms AI from a black box into a first-class architectural element — giving architects and data scientists a shared language, and ensuring these systems remain explainable, traceable, and safe as they become part of everyday infrastructure.

And also this meetup is the perfect platform to expand knowledge and build valuable connections within the community.

Additional info

Definitely stay until the end because we tend to end the event with pizza .

Königswinter has very good connections to public transport. From the Königswinter ferry stop on line 66 it is only a 5-minute walk to the office of oh22information services GmbH.

The parking spaces directly at the company are limited, but the Drachenfelsbahn car park can be reached in about 5 minutes on foot.
Please register for the event as the number of places is limited. If you are unable to attend, we ask that you cancel your registration early to enable others to participate.

We look forward to seeing you at the arcAI42: Documenting Intelligence as Architecture Meetup and spending a stimulating evening with you!