SwiftUI + WKWebView hybrid app for viewing markdown files with:
- 20 built-in color themes (Catppuccin, Dracula, Nord, Gruvbox, etc.)
- Full theme editor with live preview, custom CSS, and font selection
- File watching with live reload and scroll position preservation
- External editor integration with configurable app list
- Frontmatter display options (hide, metadata, raw markdown)
- Global custom CSS support
- Find in document (Cmd+F) with match count
- Theme cycling via Cmd+Shift+Up/Down
- Registered as .md file handler
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>