electron-protocol-handler-setup Register and handle custom URL protocols (deep linking) for Electron applications across Windows, macOS, and Linux. This skill enables apps to respond to custom URL schemes like for deep linking and inter-application communication. Capabilities - Register custom protocol handlers at OS level - Handle protocol URLs in running application - Configure electron-builder for protocol registration - Implement secure URL parsing and validation - Handle protocol activation on app launch - Support single-instance enforcement with protocol handling - Generate platform-spe…