How do you document and share domain events and aggregates with other developers and stakeholders?

In event storming, we document and convey domain events and aggregates through collaborative workshops.We initiate with on-site sessions using post-it notes for a tangible mapping, engaging all stakeholders.This approach helps grasp the product's breadth and pinpoint critical issues, aiding new members' onboarding.Including diverse perspectives,from technical teams to business executives,is key for a comprehensive understanding.The facilitator directs the discussions, tackling unclear areas with 'hotspot' post-its and ensures a shared view among technical and business participants.Following these sessions, we transition the outcomes to digital platforms like Confluence, miro or mural boards. Miro etc tools are also good for online workshops

The event storming meetings I participated in always helped to provide in great detail what actions domain models and their aggregates should take during their journey, however the documentation was always flawed in my opinion, as ideas were usually left in post- its and many were not persisted in some knowledge base.

Living documentation is key in DDD to keep domain knowledge current. It should be integrated into the SDLC using tools like Mural or Miro for collaborative updates. Post-event storming, documentation needs regular reviews and updates, stored in accessible tools like IDP service catalogs or enterprise architecture tools. This approach standardizes naming, conventions, and streamlines repository management, ensuring the domain model and system designs stay aligned with real business needs and system implementations.

At this point I believe that it is a cultural issue, to carry out good documentation in source codes, as it is extremely important for a good implementation of DDD, that each component originating from a DDD concept is explicitly documented, bringing its meaning and purpose to the workload.

In several companies I've been to, an event-based architecture is always a challenge, or even a taboo, as it brings greater implementation and monitoring complexity than more traditional architectures, but its gains are tangible, and necessary in increasingly more workloads. dynamic and complex

Domain Storytelling (DST) is a collaborative modeling method used in Domain-Driven Design (DDD) to create a shared understanding of domain knowledge among stakeholders. It involves creating simple, visual narratives (stories) that illustrate how people, systems, and data interact within a specific domain. Stakeholders, including domain experts and developers, gather to tell and refine these stories, which are then depicted using icons and arrows on a whiteboard or digital tool. This process helps uncover implicit knowledge, align mental models, and identify bounded contexts and aggregates, ultimately informing the design of the system.

In story telling sessions, I experienced that teller should be decide randomly or newest member of team . Because, the model should be understandable for everyone . For each step teller can see and descripe the story. Some times for creating events, we can do story telling before finish and team members try to see what is this story going to, we can catch forgotten steps and wrong sorted ones. I experienced two interesting story telling One of them is reverse reading and relocating events and forcing participants to fix the story. Second one is really helpful to increase collaboration .

For the aggregate design canvas, collaboration is essential. Start by pooling entities for a bounded context, then identify root entities. Using tools like Miro or Mural facilitates this collaborative process and has received positive feedback. Once the aggregate canvas and entities are defined, store them in tools like Confluence for easy access and searchability. Creating an entity glossary in Confluence helps users quickly find relevant aggregate canvases. This method enhances understanding and efficiency in managing aggregates.

The Aggregate Design Canvas is a tool used in Domain-Driven Design (DDD) to help design aggregates, which are clusters of related entities treated as a single unit for data changes. The canvas is a visual aid that guides the design process by focusing on key aspects of an aggregate. It typically includes sections for defining the aggregate's root entity, invariants, lifecycle, associations, and responsibilities. By systematically filling out the canvas, teams ensure that aggregates are well-defined, encapsulate their invariants, and maintain consistency within their boundaries. This approach promotes clarity, alignment, and effective communication among stakeholders.

Effective DDD documentation requires aligning the right tools with DDD phases and integrating them into the SDLC, ensuring structured review and update cycles. Standardization is key to avoiding complexity and reducing cognitive load. Tools like Confluence, Miro, or Mural aid in organizing and visualizing domain knowledge. Regularly updated, searchable documentation, including glossaries (Ubiquoutes language terms or entities or business rules etc) in Confluence, ensures quick access to relevant information, streamlining development processes and maintaining clear, comprehensive system insights.