4. Create with DSL, export to PlantUML/Mermaid

Create and edit workspaces on your computer using the Structurizr DSL and a text-editor/IDE.
Store the workspace.dsl and workspace.json files in version control (e.g. git).
export the workspace to PlantUML or Mermaid.
Share diagrams via your existing documentation workflow (e.g. GitHub Markdown, Confluence, etc).

Summary

Workspace editing: (all Structurizr DSL features are available, workspaces are stored in version control, slower feedback because an export step is required before diagrams can be rendered with PlantUML/Mermaid)
Diagram viewing: (static diagrams, automatic layout only, diagram look and feel is basic when compared to the Structurizr diagram viewer)

Workspace editors can use the full set of Structurizr DSL features because the Structurizr DSL parser runs on their computer.
The workspace.dsl and workspace.json files can easily be stored in version control.
Multiple PlantUML/Mermaid diagrams can be created from a single Structurizr DSL file, thereby keeping all diagrams in sync when Structurizr DSL changes are made.
Automatic diagram layout.
Mermaid diagrams are rendered automatically in many tools, for example in GitHub README.md files.

Workspace editors require Docker or Java 21+ installed to run export.
Doesn’t require the Structurizr server to be installed.
The PlantUML and Mermaid diagrams don’t look as polished as those rendered by the diagram viewer found in local and server.
PlantUML/Mermaid diagrams are static, so there is no “double-click to zoom” feature, no tooltips, etc.
Diagram layout cannot be modified.