Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add mickeyyaya/refactoring-skills --skill caching-strategiesgit clone --depth 1 https://github.com/mickeyyaya/refactoring-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/mickeyyaya/refactoring-skills/caching-strategies)<a href="https://agentmods.dev/skills/mickeyyaya/refactoring-skills/caching-strategies"><img src="https://agentmods.dev/badge/skills/mickeyyaya/refactoring-skills/caching-strategies/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/mickeyyaya/refactoring-skills/caching-strategies"><img src="https://agentmods.dev/badge/skills/mickeyyaya/refactoring-skills/caching-strategies.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00084 | $0.05003 |
| Opus 5 | $0.00042 | $0.02501 |
| Sonnet 5 | $0.00017 | $0.01001 |
| Haiku 4.5 | $0.00008 | $0.00500 |
Grade A, and why
caching-strategies scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
const value = await this.fetch(key); // delegates to backing store How it starts
The opening of the file, as written. The whole thing — 521 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Caching Strategies
Overview
Poorly designed caches cause data staleness, thundering herds on cold starts, unbounded memory growth, and invalidation bugs that silently serve wrong data for hours. Use this guide when designing a new cache layer, reviewing caching code, or debugging performance regressions tied to cache misuse.
When to use: Adding caching to a service or API; reviewing code that reads from Redis, Memcached, or an in-process store; evaluating CDN configuration; auditing memory usage of long-running processes; troubleshooting stale-data incidents.
Quick Reference
| Pattern | Core Idea | Primary Red Flag |
|---|---|---|
| Cache-Aside | App checks cache, falls back to DB, populates cache | No TTL set; stale data served indefinitely |
| Read-Through | Cache layer fetches from DB automatically on miss | Miss storms on cold start; no stampede protection |
| Write-Through | Write hits cache and DB synchronously | Write latency doubles; inconsistency if either fails |
| Write-Behind | Write hits cache, DB updated asynchronously | Data loss if cache crashes before flush |
| Stampede / Thundering Herd | Many callers race on a single cold key | All callers hit DB simultaneously on expiry |
| Singleflight / Mutex | One caller fetches; others wait for that result | Lock contention if fetch is slow |
| CDN / Cache-Control | Edge caches static and semi-static responses | Missing stale-while-revalidate; over-aggressive purging |
| LRU / LFU / TTL Eviction | Remove entries by recency, frequency, or age | Unbounded cache size; wrong eviction policy for access pattern |
| Multi-Layer Cache | L1 in-process, L2 distributed, L3 CDN | L1/L2 inconsistency; missing invalidation at each layer |
| Event-Based Invalidation | Domain events trigger targeted cache evictions | Missed event; stale data blindness after writes |
| Versioned Keys | Key includes version or content hash | Old keys accumulate; no expiry on versioned entries |
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 12d ago First seen · 521 lines · 84 tokens per session scan A 6967ed7b29c9
caching-strategies is a skill published in the GitHub repository mickeyyaya/refactoring-skills (6 stars, last pushed 5mo ago), licensed MIT. It adds 84 tokens to every session and 5,003 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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