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This skill provides specialized guidance for designing and deploying high-performance caching layers to significantly reduce latency and server overhead. It covers essential patterns including granular HTTP Cache-Control headers, ETag validation, Redis-based application caching, and CDN edge optimization tailored for modern frameworks like Next.js and FastAPI. By providing proven implementation patterns for sophisticated invalidation strategies—such as Stale-While-Revalidate and write-through caching—it helps developers build resilient, low-latency applications that handle high traffic volumes with ease.