Caching strategy

Skill AtulPurohit/Antigravity-Awesome-Skills/skills/caching-strategy

Design comprehensive multi-layer caching strategies across CDN, application, and database tiers for maximum performance.From its SKILL.md

Install

npx -y skills add AtulPurohit/Antigravity-Awesome-Skills --skill caching-strategy

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SKILL.md

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Caching Strategy Designer

Purpose

Design and implement caching at every layer to dramatically reduce latency and database load.

Cache Layers

Browser Cache: Static assets, API responses with Cache-Control headers
CDN Cache: Cloudflare/CloudFront for global edge caching
Application Cache: Redis/Memcached for computed data
Database Cache: Query result cache, connection pooling

Cache-Control Headers

# Immutable static assets (hash in filename)
Cache-Control: public, max-age=31536000, immutable

# API: cache for 60s, stale-while-revalidate for 5 min
Cache-Control: public, s-maxage=60, stale-while-revalidate=300

# Private user data
Cache-Control: private, no-cache

# Never cache
Cache-Control: no-store

Application Cache Pattern

# Cache-aside with stampede prevention
def get_cached(key: str, ttl: int, fetch_fn: callable):
    if value := cache.get(key):
        return value
    
    # Atomic lock prevents stampede
    with cache.lock(f"lock:{key}", timeout=10):
        # Double-check after acquiring lock
        if value := cache.get(key):
            return value
        value = fetch_fn()
        cache.set(key, value, ttl)
        return value

Invalidation Strategies

TTL-based: Expire after fixed time (simple, may be stale)
Event-driven: Invalidate on data change (accurate, complex)
Tag-based: Group related cache items, flush by tag
Cache-busting: Change URL/key when content changes

Outputs

Caching strategy document
Cache-Control header configuration
Application cache implementation
Invalidation event handlers
Cache monitoring metrics

What ships with it

Read from the repository

Just SKILL.md. No reference files, no scripts.