Ueli is a cross-platform keystroke launcher built with Electron, TypeScript, and React (Fluent UI). It provides a hotkey-triggered search window that aggregates search results from a modular extension system. Over 20 built-in extensions enable application and file searching, web search, calculator, color conversion, currency conversion, password generation, text processing, and more. The architecture follows a clean separation of concerns: the main process handles OS-specific operations (window management, tray icon, autostart, file icon extraction), a preload script enforces secure IPC via contextBridge, and the renderer provides a responsive React UI. Extensions implement a common contract and are loaded dynamically via a module registry. The codebase is well-tested (vitest), employs dependency injection, and includes localization in 7 languages. While the project is actively maintained and demonstrates solid engineering practices, some platform-specific components (e.g., Linux file searcher) are incomplete or stubbed, and the large extension surface introduces maintenance overhead.