Document editor
Math and Mermaid diagrams
`$$...$$` for math, ```mermaid blocks for diagrams.
Rendering engines
KaTeX renders the math, Mermaid renders the diagrams. Both run fully local — no network, no data leaving your machine.
Both are live: move the cursor out of the math span or code fence and the preview updates immediately.
Math syntax
行内公式：$E = mc^2$，能量正比于质量。
块公式：
$$
\int_0^1 x^2 \, dx = \frac{1}{3}
$$
矩阵：
$$
A = \begin{pmatrix}
a & b \\
c & d
\end{pmatrix}
$$
对齐方程组：
$$
\begin{aligned}
f(x) &= x^2 + 2x + 1 \\
&= (x + 1)^2
\end{aligned}
$$Mermaid examples
```mermaid
graph LR
A[Idea] --> B[Draft] --> C[Review] --> D[Publish]
C --> A
```
```mermaid
sequenceDiagram
participant U as User
participant K as Kition
participant A as Agent
U->>K: Cmd+K "summarize this doc"
K->>A: prompt + context
A-->>K: summary
K-->>U: render in panel
```
```mermaid
erDiagram
USER ||--o{ DOC : writes
DOC ||--o{ BACKLINK : has
```Common gotchas
- Backslashes need escaping in Markdown — write
\\to get a single\ - Block
$$must live on its own line; blank lines around it are safest - Mermaid labels with special chars (parens, slashes) need quoting:
["My Step (v2)"] - For formulas KaTeX cannot render, you’ll see a red error — fall back to an SVG image
Export behavior
On PDF / DOCX export, math and Mermaid are pre-rendered into embedded SVG — recipients need no runtime, works offline.
If math looks slightly off after export, it’s usually a KaTeX font-fallback issue; tick "Embed math fonts" in Export Settings to fix it.