Tiago is a Typst package for rendering diagrams with Diago, a D2-compatible diagram engine implemented in MoonBit. It can render a D2 diagram to SVG, ASCII or Unicode text.

The typst package removed embedded fonts and font metrics data from the WASM, and uses release build with --strip tag compared to diago's WASM demo, which reduces its binary size from ~21 MiB to ~5 MiB unzipped.

architecture.typ	c4.typ	containers.typ
isomorphic.typ	sequence.typ	sql_tables.typ
styles.typ	markdown.typ	security.typ

#import "@preview/tiago:0.1.0": *

Renders diagram source to an SVG-backed Typst image. Extra arguments are forwarded to Typst's image(...), so you can pass values like width, height, or alt.

#render(
  "a -> b: hello",
  // engine: "elk",
  // width: 220pt,
  // height: ...
)

Renders diagram source to raw SVG bytes.

#let svg = render-svg("a -> b")

Renders diagram source to ASCII text.

#raw(render-ascii("a -> b"))

Renders diagram source to Unicode box-drawing text.

#raw(render-unicode("a -> b"))

engine is optional. When omitted, the package uses Diago's default layout engine.

Supported engine names:

• dagre
• elk
• railway

#import "@preview/tiago:0.1.0": *

= Tiago Example

#let source = ```
server: Web Server
database: Database {
  shape: cylinder
}
cache: Cache

server -> database: queries
server -> cache: reads
cache -> database: fallback
```.text

== SVG

#render(
  source,
  engine: "elk",
  width: 300pt,
)

== ASCII

#raw(render-ascii(source))

== Unicode

#raw(render-unicode(source))

For a sample document, see example.typ.

• Image paths in D2 diagrams are linked images. Path to linked images are relative to the --root directory. Linked SVG images are not supported yet.
• Some features are not properly supported. Switching rendering engines may help.

Apache-2.0. See LICENSE.