Implements a distributed single-writer pattern using file-based leases to ensure only one application instance or window holds ownership of a resource (e.g., client state). Includes crash-safe owner publication, stale lease recovery, and owner retirement. Demonstrates a robust cross-process coordination pattern that could be extracted into a reusable library for Electron or any Node.js application needing exclusive access across processes.

A lightweight event bus that records the last emitted status for each event type and replays it to new subscribers. Supports wildcard events and works without any external dependencies. The pattern is self-contained and solves the common problem of state synchronization across late-joining subscribers, making it reusable in any TypeScript application.

A centralized keyboard shortcut registry that allows components to declaratively bind shortcuts to actions with priority ordering and event lifecycle management. Handles key combo parsing, conflict resolution, and cleanup on component unmount. This pattern is easily portable to any web application needing structured keyboard shortcut management.

A filesystem browsing service that provides safe traversal with path traversal protection, symlink handling, Windows drive enumeration, and configurable root restriction. Offers listing, reading (with size limits), and safe path normalization. This service is fully self-contained and could be extracted as a library for any Node.js application needing secure filesystem exploration.