# Markdown Novel Viewer

> markdown-novel-viewer

- Skill: `binhmuc/markdown-novel-viewer` (Agent Skill, multi-file: 20 files)
- Install (CLI): `npx skillmds@latest add binhmuc/markdown-novel-viewer`
- Raw SKILL.md: https://api.skillmd.com/api/skills/binhmuc/markdown-novel-viewer/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Docs & Writing
- Author: binhmuc (https://skillmd.com/u/binhmuc)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/binhmuc/markdown-novel-viewer

---

# markdown-novel-viewer

Background HTTP server rendering markdown files with calm, book-like reading experience.

## ⚠️ Installation Required

**This skill requires npm dependencies.** Run one of the following:

```bash
# Option 1: Install via ClaudeKit CLI (recommended)
ck init  # Runs install.sh which handles all skills

# Option 2: Manual installation
cd .claude/skills/markdown-novel-viewer
npm install
```

**Dependencies:** `marked`, `highlight.js`, `gray-matter`

Without installation, you'll get **Error 500: Error rendering markdown**.

## Purpose

Universal viewer - pass ANY path and view it:
- **Markdown files** → novel-reader UI with serif fonts, warm theme
- **Directories** → file listing browser with clickable links

## Quick Start

```bash
# View a markdown file
node .claude/skills/markdown-novel-viewer/scripts/server.cjs \
  --file ./plans/my-plan/plan.md \
  --open

# Browse a directory
node .claude/skills/markdown-novel-viewer/scripts/server.cjs \
  --dir ./plans \
  --host 0.0.0.0 \
  --open

# Background mode
node .claude/skills/markdown-novel-viewer/scripts/server.cjs \
  --file ./README.md \
  --background

# Stop all running servers
node $HOME/.claude/skills/markdown-novel-viewer/scripts/server.cjs --stop
```

## Slash Command

Use `/preview` for quick access:

```bash
/preview plans/my-plan/plan.md    # View markdown file
/preview plans/                   # Browse directory
/preview --stop                   # Stop server
```

## Features

### Novel Theme
- Warm cream background (light mode)
- Dark mode with warm gold accents
- Libre Baskerville serif headings
- Inter body text, JetBrains Mono code
- Maximum 720px content width

### Directory Browser
- Clean file listing with emoji icons
- Markdown files link to viewer
- Folders link to sub-directories
- Parent directory navigation (..)
- Light/dark mode support

### Plan Navigation
- Auto-detects plan directory structure
- Sidebar shows all phases with status indicators
- Previous/Next navigation buttons
- Keyboard shortcuts: Arrow Left/Right

### Keyboard Shortcuts
- `T` - Toggle theme
- `S` - Toggle sidebar
- `Left/Right` - Navigate phases
- `Escape` - Close sidebar (mobile)

## CLI Options

| Option | Description | Default |
|--------|-------------|---------|
| `--file <path>` | Markdown file to view | - |
| `--dir <path>` | Directory to browse | - |
| `--port <number>` | Server port | 3456 |
| `--host <addr>` | Host to bind (`0.0.0.0` for remote) | localhost |
| `--open` | Auto-open browser | false |
| `--background` | Run in background | false |
| `--stop` | Stop all servers | - |

## Architecture

```
scripts/
├── server.cjs               # Main entry point
└── lib/
    ├── port-finder.cjs      # Dynamic port allocation
    ├── process-mgr.cjs      # PID file management
    ├── http-server.cjs      # Core HTTP routing (/view, /browse)
    ├── markdown-renderer.cjs # MD→HTML conversion
    └── plan-navigator.cjs   # Plan detection & nav

assets/
├── template.html            # Markdown viewer template
├── novel-theme.css          # Combined light/dark theme
├── reader.js                # Client-side interactivity
├── directory-browser.css    # Directory browser styles
```

## HTTP Routes

| Route | Description |
|-------|-------------|
| `/view?file=<path>` | Markdown file viewer |
| `/browse?dir=<path>` | Directory browser |
| `/assets/*` | Static assets |
| `/file/*` | Local file serving (images) |

## Dependencies

- Node.js built-in: `http`, `fs`, `path`, `net`
- npm: `marked`, `highlight.js`, `gray-matter` (installed via `npm install`)

## Customization

### Theme Colors (CSS Variables)

Light mode variables in `assets/novel-theme.css`:
```css
--bg-primary: #faf8f3;      /* Warm cream */
--accent: #8b4513;          /* Saddle brown */
```

Dark mode:
```css
--bg-primary: #1a1a1a;      /* Near black */
--accent: #d4a574;          /* Warm gold */
```

### Content Width
```css
--content-width: 720px;
```

## Remote Access

To access from another device on your network:

```bash
# Start with 0.0.0.0 to bind to all interfaces
node server.cjs --file ./README.md --host 0.0.0.0 --port 3456
```

When using `--host 0.0.0.0`, the server auto-detects your local network IP and includes it in the output:

```json
{
  "success": true,
  "url": "http://localhost:3456/view?file=...",
  "networkUrl": "http://192.168.2.75:3456/view?file=...",
  "port": 3456
}
```

Use `networkUrl` to access from other devices on the same network.

## Troubleshooting

**Port in use**: Server auto-increments to next available port (3456-3500)

**Images not loading**: Ensure image paths are relative to markdown file

**Server won't stop**: Check `/tmp/md-novel-viewer-*.pid` for stale PID files

**Remote access denied**: Use `--host 0.0.0.0` to bind to all interfaces