Assign Technologies to C4 Model Elements and Relationships

Why this matters?

When you design software architecture using the C4 Model, you don't just think about components, systems, and their interactions — you also care about how they're implemented and what technologies support them. This new capability makes it easy to capture that information directly in your diagrams.

Benefits

1. Better context for decision-making When stakeholders review the architecture, they immediately see not just what the building blocks are, but also how they're built. This makes discussions around feasibility, performance, and security more concrete.
2. Improved technical documentation Architecture diagrams often lose value over time when they're detached from implementation details. By attaching technologies, your C4 Models stay more accurate and relevant to the real system.
3. Clearer communication between teams Developers, DevOps, and business analysts can instantly understand the tech stack without digging through separate documentation.
4. Risk and impact analysis When a technology needs to be upgraded or replaced, you can easily see which parts of the system will be affected—whether it's a component, a database, or a communication protocol.
5. Detailed technology information Each technology assigned to an element or relationship is described in Pistacy and includes links to its official technical documentation and website, making it easy to learn more or verify implementation details.

How to use it?

In the edit view of any element or relationship, you can now select one or more technologies from your project's technology library. Pistacy will then display the icon of the first selected technology directly on the elements in the diagram view, making it visually clear what technology drives each part of your architecture.

This addition bridges the gap between high-level architecture and implementation details, making Pistacy an even more powerful tool for living, evolving architectural documentation.