Arch3 methodology
Arch3 is the diagramming methodology published by arch3-diagram.
It is inspired by the C4 Model, but defines its own notation, model, and renderer contracts.
Arch3 is independent from PlantUML. PlantUML is only one extension target for rendering.
Goal
Provide a pragmatic, AI-first approach with only three layers:
- context
- containers
- components
Principles
- versionable diagram as code
- rich metadata on containers
- drill-down expansion from containers to components
- library dependency visibility at component level
- a schema designed for both humans and LLMs