A Swift result builder that enables declarative construction of QEMU command-line arguments. It defines QEMUArgument and QEMUArgumentFragment protocols, allowing developers to compose argument lists using SwiftUI-like syntax. This pattern is self-contained, reusable for any command-line tool generation, and demonstrates non-obvious use of Swift's result builder feature.

A C-based keyboard mapping utility that converts text input to IBM scan codes based on the current keyboard locale. It handles special characters, control keys, and provides a mapping table for common layouts. This component is isolated, could be extracted for any application needing text-to-scancode conversion, and demonstrates deep understanding of keyboard input handling across different locales.

A physics-based cursor movement model that simulates inertia and resistance for mouse cursor control on touch devices. It uses velocity and friction to create smooth, natural cursor motion. This component is self-contained, reusable for any touch-based cursor implementation, and demonstrates non-trivial physics simulation in a UI context.

An Objective-C abstraction layer for SPICE I/O that manages the SPICE connection lifecycle, clipboard sharing, USB device redirection, and dynamic resolution changes via the SPICE agent. It provides a clean delegate-based interface decoupled from the UI. This component is reusable for any application needing SPICE integration and demonstrates expertise in the SPICE protocol and asynchronous I/O patterns.

A Swift class that generates RSA key pairs and self-signed X.509 certificates for TLS-secured remote connections. It uses OpenSSL via a C bridge (GenerateKey.c) and provides methods for key persistence and certificate validation. This component is self-contained, reusable for any application requiring secure peer-to-peer authentication, and demonstrates non-obvious cryptographic engineering on Apple platforms.