Provides a `@inLocalStorage` decorator that makes Ember tracked properties automatically persist to localStorage. It is a self-contained addon that can be extracted and used in any Ember Octane project to add reactive, persistent state without boilerplate. Demonstrates advanced use of decorators and the `@tracked` system.

A utility that integrates xstate state machines with Ember's reactivity system, allowing state machine transitions to trigger re-renders and Ember services to act as machine actors. It is reusable for any Ember project needing complex state management, and demonstrates non-obvious skill in bridging two frameworks.

Implements a connection pool for managing multiple WebSocket relay connections with configurable min/max limits, idle timeout, and automatic reconnection. It is a standalone utility that can be reused in any JavaScript project needing pooled WebSocket connections, demonstrating solid resource management patterns.

The CryptoConnector abstracts communication with a web worker that performs cryptographic operations (key generation, encryption, decryption) using tweetnacl and libsodium. It provides a clean promise-based API and handles worker lifecycle. This pattern is reusable for any application needing to offload heavy computation to web workers without coupling to the worker implementation.

Implements a chain of signed votes (VoteChain) for decentralized channel governance, where each vote is cryptographically signed and linked to the previous vote. Includes verification logic to ensure chain integrity. This is a reusable pattern for building trustless voting systems and demonstrates advanced cryptographic data structures.