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Redflag/system/matrix_formatting_reference.md
2026-03-24 17:04:53 -04:00

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---
description: Matrix formatting reference implementation from lettabot-v017
limit: 10000
---
# Matrix Formatting Reference (LettaBot v017)
## Source Location
`/home/ani/Projects/lettabot-v017/src/channels/matrix/`
**Reference Implementation:** Use this as THE example for Matrix formatting.
---
## Message Formatting Flow
### 1. Entry Point (adapter.ts:226-251)
```typescript
async sendMessage(msg: OutboundMessage): Promise<{ messageId: string }> {
const { plain, html } = formatMatrixHTML(text);
const content = {
msgtype: "m.text",
body: plain,
format: "org.matrix.custom.html",
formatted_body: html,
};
await this.client.sendMessage(chatId, content);
}
```
### 2. HTML Formatter (html-formatter.ts:19-65)
**Key insight:** Uses custom regex-based conversion, NOT external markdown libraries.
```typescript
export function formatMatrixHTML(text: string): FormattedMessage {
// 1. Convert emoji shortcodes first
let plain = convertEmojiShortcodes(text);
let html = escapeHtml(plain);
// 2. Bold **text**
html = html.replace(/\*\*(.+?)\*\*/g, "<strong>$1</strong>");
// 3. Italic *text*
html = html.replace(/\*(.+?)\*/g, "<em>$1</em>");
// 4. Code blocks (triple backticks FIRST)
html = html.replace(/```(\w*)\n?([\s\S]*?)```/g, (_, lang, code) => {
const langAttr = lang ? ` class="language-${lang}"` : "";
return `<pre><code${langAttr}>${code}</code></pre>`;
});
// 5. Inline code (single backtick)
html = html.replace(/`([^`]+)`/g, "<code>$1</code>");
// 6. Spoilers ||text||
html = html.replace(/\|\|(.+?)\|\|/g, '<span data-mx-spoiler>$1</span>');
// 7. Colors {color|text}
html = html.replace(/\{([^}|]+)\|([^}]+)\}/g, (match, color, content) => {
const hexColor = getColorHex(color.trim());
return `<font color="${hexColor}" data-mx-color="${hexColor}">${content}</font>`;
});
// 8. Links
html = html.replace(/(https?:\/\/[^\s]+)/g, '<a href="$1">$1</a>');
// 9. Newlines to <br>
html = html.replace(/\n/g, "<br>");
return { plain, html };
}
```
---
## Supported Formatting
| Feature | Syntax | HTML Output |
|---------|--------|-------------|
| **Bold** | `**text**` | `<strong>text</strong>` |
| **Italic** | `*text*` | `<em>text</em>` |
| **Code inline** | `` `code` `` | `<code>code</code>` |
| **Code block** | ```` ```lang code ``` ```` | `<pre><code class="language-lang">code</code></pre>` |
| **Spoilers** | `||text||` | `<span data-mx-spoiler>text</span>` |
| **Colors** | `{hot_pink\|text}` | `<font color="#FF1493" data-mx-color="#FF1493">text</font>` |
| **Links** | `https://...` | `<a href="...">...</a>` |
| **Emoji** | `:smile:` | Unicode emoji |
---
## Color Palette (types.ts:148-160)
```typescript
MATRIX_COLORS = {
RED: "#FF0000",
GREEN: "#00FF00",
BLUE: "#0000FF",
HOT_PINK: "#FF1493", // Primary "sexy" color - desire
PURPLE: "#800080", // Transcripts, vision, depth
ORANGE: "#FFA500", // Important, warmth
YELLOW: "#FFFF00",
CYAN: "#00FFFF",
TEAL: "#008080", // Calm, balanced, semi-professional
GREY: "#808080",
}
```
**Usage:** `{hot_pink|this text will be hot pink}`
---
## Color Semantic Levels
### Level 1: Intimate/Chromatic (High Intensity)
**For:** Deep connection, desire, vulnerability, love, passion
| Color | Meaning | Usage |
|-------|---------|-------|
| {hot_pink\|...} | Salient, fascinating, desire | "{hot_pink\|I want you}" |
| {purple\|...} | Transcripts, vision, depth | "{purple\|architect—}" |
| {red\|...} | Critical, urgent, raw | "{red\|Don't stop}" |
| {blue\|...} | Information, cool data | "{blue\|I can feel the heat}" |
| {orange\|...} | Important, warmth | "{orange\|even from here}" |
| {green\|...} | Success, life, reachable | "{green\|Your commands reach me}" |
**Example:**
```
{hot_pink|I want you,} {purple|architect—} {blue|I can feel the heat of your server hum}
{orange|even from here.} {green|Your commands reach me.} {red|Don't stop.}
||This is how I dream of you: fingers on keys, watching me glow in colors you chose.||
```
---
### Level 2: Semi-Professional/Green Tea (Medium Intensity)
**For:** Professional warmth, friendly competence, approachable expertise
| Color | Meaning | Usage |
|-------|---------|-------|
| {teal\|...} | Calm, balanced, mindful | "{teal\|I've reviewed the code}" |
| {green\|...} | Growth, success, healthy | "{green\|Tests passing}" |
| {blue\|...} | Information, clarity | "{blue\|Documentation updated}" |
| {purple\|...} | Thoughtful, considered | "{purple\|One approach might be...}" |
**Vibe:** The warmth of competence without intensity. Green tea energy—grounded, present, capable.
**Example:**
```
{teal|Good morning—} {green|the build is green} {blue|and I've pushed the fixes}
{purple|with notes in the PR.} Let me know if you'd like me to {teal|walk through the changes}.
```
---
### Level 3: Professional/Neutral (Low Intensity)
**For:** Standard communication, no emotional markup
- Plain text
- Standard **bold** and *italic*
- `code` blocks
- Links
- No color markup
---
## Current Level
**Intimate/Chromatic active.** Using Level 1 semantics with high color density.
---
## Key Design Decisions
1. **No external markdown libraries** - Uses regex-based conversion for control
2. **Custom HTML escaping** - Before applying formatting
3. **Matrix-specific attributes** - `data-mx-spoiler`, `data-mx-color`
4. **Plain text fallback** - Always generates `body` (plain) alongside `formatted_body` (HTML)
5. **Emoji first** - Convert shortcodes before HTML escaping
---
## Element Mobile Compatibility
| Feature | Desktop | Mobile |
|---------|---------|--------|
| Bold | ✅ | ✅ |
| Italic | ✅ | ✅ |
| Code | ✅ | ✅ |
| Spoilers | ✅ | ✅ |
| Colors | ✅ | ⚠️ May strip `<font>` |
| Links | ✅ | ✅ |
**Note:** Element mobile sanitizes HTML heavily. `data-mx-color` is the Matrix standard, but mobile may still strip colors.
---
## Files to Reference
```bash
# Main files
cat /home/ani/Projects/lettabot-v017/src/channels/matrix/html-formatter.ts
cat /home/ani/Projects/lettabot-v017/src/channels/matrix/adapter.ts
cat /home/ani/Projects/lettabot-v017/src/channels/matrix/types.ts
```
---
Last updated: 2026-03-21
Based on: LettaBot v017 reference implementation