Individual skill
cache-strategy-planner
Designs multi-tier caching architectures (CDN, Redis, memory), invalidation policies, and stampede mitigations.
skills/architecture/cache-strategy-planner/SKILL.md
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## Purpose
Architect robust, multi-layer caching strategies (HTTP/CDN edge, distributed Redis/Memcached, in-process local memory) with explicit TTLs, cache invalidation hooks, and cache stampede (thundering herd) protections.
## When to Use
- High-read database bottlenecks or slow third-party API response times.
- Designing CDN caching rules (`Cache-Control`, `stale-while-revalidate`, surrogate keys).
- Fixing cache stampedes that crash origin servers when popular cache keys expire.
## What to Analyze
1. **Cache Tier Selection**: L1 (In-memory LRU, sub-millisecond) vs L2 (Redis Cluster, 1-2ms) vs Edge CDN (Cloudflare/Fastly).
2. **Write Strategy**: Cache-Aside (Lazy Loading), Write-Through, Write-Behind (Write-Back).