Implements a thread-safe media caching system that downloads remote images, manages cache filenames (SHA-256 hashed or semantic), and maintains an atomic index file for tracking cached entries. Includes stale entry detection, URL validation, and compression via caesium. This pattern is reusable in any application that needs to cache remote media assets with integrity guarantees and minimal I/O overhead.

Parses custom library definitions using macros like `{library}`, `{platform}`, `{gameFile}` to map filesystem directory structures to game and platform metadata. Validates definitions with a multi-pass approach (template validation, file matching, path generation). Demonstrates a clever use of pattern matching and validation logic that can be adapted for any template-based filesystem mapping (e.g., media servers, document managers).

Generic asynchronous job manager that spawns background tasks with named dependencies, progress tracking via broadcast channels, and automatic cache invalidation. Supports waiting for other jobs before execution and exposes a clean API for job lifecycle management. This lightweight orchestrator can be extracted for use in any Rust application requiring structured background task coordination with inter-task dependencies.