mermaid

sublimated renders .mmd and .mermaid files as diagrams. push via git, view the rendered diagram on the web.

• diagrams are rendered server-side on push — no client-side JavaScript needed
• the rendered SVG is stored alongside the source, so viewing is instant
• edit mode uses CodeMirror (same as .ts, .py, etc)
• supported on both sublimated.com (file viewer) and run.sublimated.com (published sites)
• inline comments and reactions work on the rendered diagram (SVG is inline DOM)

demos

one file per diagram type — push them to see them rendered:

• flowchart — nodes, edges, decisions
• sequence — message passing between participants
• class — class hierarchy with methods and properties
• state — state machine with transitions
• er — entity relationship diagram
• gantt — project timeline
• pie — pie chart
• gitgraph — git branch and merge history
• mindmap — hierarchical mind map

styling and themes

all mermaid styling features work — colors, themes, and classes are baked into the SVG at render time.

built-in themes

add a directive at the top of your .mmd file:

%%{init: {'theme': 'dark'}}%%
graph TD
    A --> B

available themes: default, dark, forest, neutral, base

custom colors with themeVariables

fine-grained control over 100+ color variables:

%%{init: {'theme': 'base', 'themeVariables': {'primaryColor': '#e8f5e9', 'lineColor': '#333'}}}%%

common variables: primaryColor, primaryBorderColor, lineColor, background, fontFamily, fontSize. each diagram type has its own variables too (e.g. actorBkg for sequence, sectionBkgColor for gantt).

classDef (reusable classes)

define named styles and apply them to nodes:

classDef green fill:#e8f5e9,stroke:#4caf50
A:::green --> B:::green

inline style (per-node)

style A fill:#e8f5e9,stroke:#333

styled demos

same diagram types with themes, classDef, and custom colors:

• flowchart-styled — classDef + themeVariables + inline style
• sequence-styled — custom actor and note colors
• class-styled — neutral theme
• state-styled — forest theme
• er-styled — dark theme
• gantt-styled — custom section and task colors
• pie-styled — custom pie color palette
• gitgraph-styled — custom branch colors
• mindmap-styled — forest theme

how it works

1. push a .mmd or .mermaid file via git (or save via edit mode)
2. sublimated detects the file type and sends it to the mermaid renderer (Selkie, Rust/WASM)
3. the rendered SVG is stored in CAS as a render_svg representation
4. when you view the file, the SVG is displayed inline
5. edit via ~edit opens CodeMirror, save triggers re-render
6. if rendering fails (invalid syntax), the source is shown as highlighted code

embedding in markdown

mermaid code blocks in markdown files are rendered server-side at push time:

```mermaid
graph LR
    A --> B
```

uses Selkie (same server-side renderer as standalone .mmd files), not client-side mermaid.js. multiple blocks in one file are batch-rendered in a single call. if a block has invalid syntax, it falls back to a regular code block.

you can also embed standalone .mmd files via content block transclusion — see the markdown mermaid docs.