Implements a template-based configuration manager that handles NVS load/save operations with type-safe access. It abstracts JSON and MessagePack serialization, providing a reusable pattern for persisting complex device settings without boilerplate. The design ensures validation and atomic updates, making it safe to extract for other embedded projects requiring robust config storage.

Provides RAII-based GPIO pin management to prevent conflicts in embedded systems. It tracks pin ownership and ensures exclusive allocation, automatically releasing pins on scope exit. This pattern is critical for hardware safety and can be reused in any ESP32 project to avoid pin contention bugs.

Wraps ESP-IDF native events into a decoupled pub/sub system. It allows modules (NFC, Lock, MQTT) to communicate without direct dependencies, reducing coupling and improving testability. The implementation demonstrates non-obvious skill in managing FreeRTOS tasks and event queues for concurrent hardware operations.

Manages reactive device state (uptime, WiFi, lock status) using Svelte 5 Runes. It integrates with the WebSocket service to stream telemetry from the backend to the UI. The store pattern is clean and parameterized, making it easily adaptable for other IoT dashboards requiring real-time status updates.