Defines a protocol and concrete implementations for resolving camera format constraints (FPS, stabilization, dynamic range, pixel format, etc.) using a penalty-based scoring system. Each constraint type implements a `penalty(for:)` method that returns a score; the format with the lowest total penalty is selected. This pattern is reusable for any system that needs to negotiate multiple conflicting requirements with fallback chains.

Implements a GPU-accelerated image resizing pipeline using Vulkan compute shaders. Manages descriptor sets, push constants, and buffer bindings for efficient frame resizing with configurable scale mode, pixel layout, and channel order. Demonstrates advanced Vulkan usage including dynamic dispatch for device extensions and reusable buffer management. The pattern is reusable for any GPU compute task requiring high-throughput image processing.

A lightweight utility that monitors `subjectAreaDidChangeNotification` with refcounted observer registration. Multiple callers can add/remove themselves without conflicts, and the observer is automatically removed when the last caller removes itself. This pattern is reusable for any iOS notification that needs shared observation with automatic cleanup.

A thread-safe pool of direct ByteBuffers that reuses buffers to avoid allocation overhead. Supports configurable buffer size and maximum pool size, with methods to borrow and return buffers. Demonstrates efficient memory management for high-throughput camera frame processing. The pattern is reusable for any Android application that needs to pool native buffers.

A generic React hook that attaches a native event listener via a `ListenerSubscription` object and automatically removes it on unmount or when dependencies change. Returns the subscription object for manual removal. This pattern is reusable for any React Native module that exposes native event listeners with a `remove()` method.