What is redis-cache-strategy?

A design and review guide for Redis caching in production backend services. Redis is a fast data store often used to temporarily keep frequently needed results; the guide covers how cached data is written, expired, refreshed, and kept consistent with the database.

Use it to choose cache patterns, set expiration times, handle stampedes and cache misses, protect hot keys, manage database consistency, and evaluate distributed locking.

It helps prevent stale data, cache overload, repeated database requests, hot keys, and failures when many requests arrive at once.

redis-cache-strategy — Skill for Claude Code and Codex by johnqtcg

Install

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.

Any agent

npx skills add johnqtcg/awesome-skills --skill redis-cache-strategy

Clone the repo

git clone --depth 1 https://github.com/johnqtcg/awesome-skills

Made for: Claude Code, Codex.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/johnqtcg/awesome-skills/redis-cache-strategy/github.svg)](https://agentmods.dev/skills/johnqtcg/awesome-skills/redis-cache-strategy)

Your own site

<a href="https://agentmods.dev/skills/johnqtcg/awesome-skills/redis-cache-strategy"><img src="https://agentmods.dev/badge/skills/johnqtcg/awesome-skills/redis-cache-strategy/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/johnqtcg/awesome-skills/redis-cache-strategy"><img src="https://agentmods.dev/badge/skills/johnqtcg/awesome-skills/redis-cache-strategy.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 113 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 6,217 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector warn 7 Sept 2026

SkillSpector: 2 findings, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

medium Rogue Agent · line 78
Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.

Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
medium Rogue Agent · line 241
Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.

Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.

How audits are shown

Origin original No closer match found in the catalogue.

Token cost

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	$0.00113	$0.06217
Opus 5.5	$0.00045	$0.02487
Sonnet 5.5	$0.00023	$0.01243
Haiku 4.5	$0.00011	$0.00622

Measured 1mo ago against content hash 607c34ac1610, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

redis-cache-strategy scanned grade A with 0 findings 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 1mo ago.

The scan reads SKILL.md. This mod also ships 9 executable files (scripts/check_go_snippets.py, scripts/gen_coverage.py, scripts/lint_cache_docs.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/redis-cache-strategy/SKILL.md · 440 lines

How it starts

The opening of the file, as written. The whole thing — 440 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Redis Cache Strategy Review

Quick Reference

§1 scope · §2 gates (context, mode, risk, completeness) · §3 depth · §4 degradation modes · §5 the checklist — the only item list · §6 pattern selection · §7 anti-example index · §8 how §5's items are scored · §9 output contract · §10 which reference to load when.

References: cache-patterns.md (patterns in depth) · cache-failure-modes.md (stampede / penetration / avalanche / hot key) · distributed-locks.md (fencing, renewal, failover) · cache-anti-examples.md (AE-1 … AE-13 with code) · redis-version-matrix.md (what each Redis version changes).

§1 Scope

In scope — Redis caching strategy for production backend services. The §5 checklist is the scope; it is not restated here, because a second copy of a list is the defect this skill spent a release removing.

Out of scope — delegate to dedicated skills:

Redis cluster topology, persistence (RDB/AOF), replication config → redis-best-practise
Application code changes → go-code-reviewer or language-specific reviewer
Security hardening, ACL, TLS → redis-best-practise

§2 Mandatory Gates

Execute gates sequentially. Each gate has a STOP condition.

Gate 1: Context Collection

Item	Why it matters	If unknown
Redis version (major.minor)	Gates several concrete answers this skill gives — see below	Never assume a version. Answer in branches, or mark the version-gated item NOT SCOREABLE
Deployment mode (standalone / sentinel / cluster)	Affects key distribution, Lua atomicity scope, lock patterns	Assume standalone — but not for a lock or a multi-key script, where Cluster changes correctness (§5 S7)
maxmemory + eviction policy	Determines what happens when cache is full	Ask; critical for correctness
Cache role in architecture	Primary cache? L1/L2? Read-through proxy?	Blocking — cannot be assumed
Data source type	SQL DB / NoSQL / external API — affects consistency patterns	Blocking — cannot be assumed
Read:write ratio	Drives pattern selection (read-heavy → cache-aside; write-heavy → write-behind)	Assume read-heavy
Consistency requirement	Eventual (seconds)? Strong? Best-effort?	Blocking — cannot be assumed
Peak QPS on cached entities	Determines stampede/hot-key risk	Assume high if unknown

Read the full file on GitHub · 440 lines

Files

What ships with it

32 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

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.

1mo ago First seen · 440 lines · 113 tokens per session scan A 607c34ac1610

Subscribe to this mod's changes

redis-cache-strategy is a skill published in the GitHub repository johnqtcg/awesome-skills (30 stars, last pushed 18d ago), licensed MIT. It adds 113 tokens to every session and 6,217 once invoked, about $0.0005 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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