Stack

App shell	Electron
Language	TypeScript, one language for core and UI
Build	electron-vite (Vite)
UI	React
Markdown	markdown-it, sanitised with DOMPurify
Code	highlight.js
Diffs	diff
Frontmatter	yaml
File watcher	chokidar
MCP	@modelcontextprotocol/sdk, zod for tool input
Fonts	Inter, Bricolage Grotesque, JetBrains Mono (bundled)

Look: the danwos tool UI kit, light and dark from the danwos tokens.