Phy Http Cache Audit
HTTP caching header analyzer that checks Cache-Control directives, ETag/Last-Modified freshness, Vary correctness, CDN cache status (X-Cache, CF-Cache-Status, Age), and stale-while-revalidate opportunities for any URL or local dev server. Identifies assets that should be cached but aren't, misconfigured max-age values, cache poisoning risks (dangerous Vary headers), and missing immutable flags on hashed static files. Supports nginx, Apache, Cloudflare, Fastly, and Next.js config generation. Zero external API — uses only curl. Triggers on "cache headers", "caching audit", "cache-control", "CDN cache miss", "no-cache no-store", "etag missing", "immutable assets", "/cache-audit".
Security AStatic scan found no risk patternsHow grading works ›
From the source SKILL.md
Your Lighthouse score says "Serve static assets with an efficient cache policy." You have Cache-Control: no-store on your 2MB vendor.js because you copied an API middleware header.
What this skill does
Phy Http Cache Audit is a community-contributed Claude Code skill in the performance sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/phy-http-cache-audit/ and loads when your prompt matches the skill's trigger.
Who uses this skill
The Phy Http Cache Audit Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 213,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).
How to install
Free
Manual install (2 steps)
mkdir -p ~/.claude/skills/phy-http-cache-audit
curl -L https://claudskills.com/skills/phy-http-cache-audit/SKILL.md \
-o ~/.claude/skills/phy-http-cache-audit/SKILL.md
Or just download SKILL.md directly and drop it into ~/.claude/skills/phy-http-cache-audit/. Claude Code auto-discovers it on next session.
Skills live at ~/.claude/skills/phy-http-cache-audit/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\phy-http-cache-audit\SKILL.md on Windows. See the full install guide for step-by-step instructions.
Telegram
📱 Install from your phone or desktop Telegram
Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →
Pro
One-click install via the desktop app
The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.
Pro
For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.
Frequently asked questions
How do I install the Phy Http Cache Audit Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy
SKILL.md from the source repository to
~/.claude/skills/phy-http-cache-audit/SKILL.md and restart Claude Code. Both flows are detailed at
claudskills.com/install/.
What does the Phy Http Cache Audit skill do?
HTTP caching header analyzer that checks Cache-Control directives, ETag/Last-Modified freshness, Vary correctness, CDN cache status (X-Cache, CF-Cache-Status, Age), and stale-while-revalidate opportunities for any URL or local dev server. Identifies assets that should be cached but aren't, misconfigured max-age values, cache poisoning risks (dangerous Vary headers), and missing immutable flags on hashed static files. Supports nginx, Apache, Cloudflare, Fastly, and Next.js config generation. Zero external API — uses only curl. Triggers on "cache headers", "caching audit", "cache-control", "CDN cache miss", "no-cache no-store", "etag missing", "immutable assets", "/cache-audit".
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Phy Http Cache Audit skill?
Use Phy Http Cache Audit when your Claude Code task falls under the Engineering category — specifically in the performance area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Phy Http Cache Audit" or describe the task and let Claude pick). Browse related skills at
/category/engineering/.
What is a Claude Code skill and how does the Phy Http Cache Audit skill fit in?
A Claude Code skill is a
SKILL.md file that lives under
~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Phy Http Cache Audit is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at
/learn/what-is-a-claude-skill/.
Attribution & license
Cite this skill
If you reference this skill in a blog post, paper, or documentation, you can cite it as:
APA
LeoYeAI. (2026). Phy Http Cache Audit [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/phy-http-cache-audit/
BibTeX
@misc{phy-http-cache-audit-2026,
author = {LeoYeAI},
title = {Phy Http Cache Audit [Claude Code skill]},
year = {2026},
publisher = {ClaudSkills},
url = {https://claudskills.com/skills/phy-http-cache-audit/}
}Embed this skill
Promote, attribute, or link this skill from your own README, blog post, or documentation. All three snippets are free to use — no sign-up, no API key. More distribution surfaces →
Badge
[](https://claudskills.com/skills/phy-http-cache-audit/?utm_source=badge&utm_medium=readme&utm_campaign=skill_badge)
<script>
<script src="https://claudskills.com/embed/phy-http-cache-audit.js" async></script>
<iframe>
<iframe src="https://claudskills.com/embed/phy-http-cache-audit.html" width="100%" height="160" frameborder="0" loading="lazy" title="ClaudSkills: Phy Http Cache Audit"></iframe>
Security scan
Grade A · scanned 2026-11-01 — free static scan against the OWASP Agentic Skills Top 10.
No risk patterns were found in any of the ten OWASP-aligned categories. How grading works ›
- ✓ Prompt injection
- ✓ Data exfiltration
- ✓ Supply chain
- ✓ Reverse shell
- ✓ Credentials
- ✓ Execution
- ✓ Filesystem
- ✓ Persistence
- ✓ Obfuscation
- ✓ Network
Show this grade on your repo (click to copy):
[](https://claudskills.com/skills/phy-http-cache-audit/#security)
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