Supported Diagram Types

The current application and MCP schema accept these twelve diagram types:

Diagram type	Purpose
freeform	General-purpose diagrams without a fixed UML/C4 level.
flowchart	Processes and decisions — Mermaid flowchart.
class	Classes, interfaces, enums and their relations — Mermaid classDiagram.
sequence	Participants exchanging messages — Mermaid sequenceDiagram.
state	States and transitions — Mermaid stateDiagram-v2.
er	Entities and relationships — Mermaid erDiagram.
uml	UML diagrams Mermaid has no family for (use case, activity, component, deployment).
c4-context	People and software systems at the highest C4 level.
c4-container	Applications, APIs, databases, queues, and containers within a system.
c4-component	Components inside a container-level view.
c4-dynamic	A C4 view of interactions between architecture elements.
c4-deployment	A C4 view of deployment infrastructure and instances.

Importing Mermaid sets the diagram type to the source's family, and exporting writes that family back. See Mermaid compatibility for import/export fidelity.

Drill-Down

Context-to-container and container-to-component navigation follow the C4 hierarchy where supported. Nested diagrams keep their own components and connections. See Link model for optional semantic links between diagram instances.