Osh - Native macOS QuickLook & AI .skill Reader
Fast, native macOS QuickLook, reader & editor for Markdown, Typst, and AI .skill files with KaTeX, Mermaid, and RTL support.
Quiet landing with drag-and-drop intake for Markdown, PDF, Office, and CSV plus one-click document conversion.
Built out of personal frustration with bloated Electron-based document viewers. Osh is written in 100% native Swift and SwiftUI for macOS with zero web view overhead.
Supports instant QuickLook previews, Markdown and Typst rendering, KaTeX math equations, Mermaid diagrams, offline PDF/Office-to-Markdown conversion, and full RTL bidirectional text support for Arabic and Hebrew.
Includes deep integration with AI skill definition files (.skill), providing developers with formatted visual inspections of local agent behaviors.
What was delivered
- Native Swift & SwiftUI macOS architecture with near-instant launch times
- Zero-dependency offline PDF, DOCX, and PPTX to Markdown conversion
- Full RTL (Arabic & Hebrew) support, KaTeX math rendering, and Mermaid graphs