plantuml-syntaxlisted

# PlantUML Syntax Reference A comprehensive reference for PlantUML diagram types with a focus on C4-PlantUML for architecture diagrams. This skill provides syntax documentation adapted from the [SpillwaveSolutions/plantuml](https://github.com/SpillwaveSolutions/plantuml) project, supplemented with ArcKit-specific C4 layout conflict rules and best practices. **This skill ships reference material, not runnable scripts.** Read the relevant reference file with `Read`, apply the syntax, and write the diagram into the user's artefact. Do not `Bash`-execute anything from `references/` — they are PlantUML/C4 syntax docs, not commands. ## Supported Diagram Types Select the appropriate diagram type and read the corresponding reference file: | Type | Reference | ArcKit Commands Using It | | ---- | --------- | ------------------------ | | C4-PlantUML | [c4-plantuml.md](references/c4-plantuml.md) | `/arckit:diagram` (C4 Context, Container, Component) | | Sequence Diagram | [sequence-diagrams.md](references/sequence-diagrams.md) | `/arckit:diagram` (Sequence mode) | | Class Diagram | [class-diagrams.md](references/class-diagrams.md) | — | | Activity Diagram | [activity-diagrams.md](references/activity-diagrams.md) | — | | State Diagram | [state-diagrams.md](references/state-diagrams.md) | — | | ER Diagram | [er-diagrams.md](references/er-diagrams.md) | — | | Component Diagram | [component-diagrams.md](references/component-diagrams.md) | — | | Use Case Diagram | [use-case-diagrams.md](