Source File

Use the src attribute to load a diagram source from an external .d2 file instead of writing it inline in the Markdown code fence. The path is resolved relative to the directory of the Markdown file.

Given a src/content/docs/diagrams/architecture.d2 file, reference it from the code block:

src/content/docs/example.md

```d2 src="./diagrams/architecture.d2" title="Architecture"
```

The above code block will be rendered as the following diagram loaded from the external file: