C4 at subsystem scale
On This Lesson 4 topics
This lesson is planned. The outline below lists the topics it will cover. The full lesson has not been published yet.
In this lesson
describe a subsystem with the C4 levels that matter.
Planned topics
- Levels: context, containers, components, code; subsystem docs mostly need context and containers, plus selected components.
- Show responsibilities, technologies, and key flows, not every class.
- Add the quality attributes and constraints that shaped the design.
- Keep diagrams as text (for example Mermaid or PlantUML; verify tool choice) so they diff.
Draft outline details
Demonstration
a container diagram description: gateway, order service, PostgreSQL, Kafka, inventory, with arrows labeled by protocol.
Check your understanding
Which C4 levels does a subsystem description mainly need?
Show answer
Context and containers, with selected components.
Practice
Apply this lesson with the module's lab, exercises and quiz.
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