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 rshankras/claude-code-apple-skills --skill http-cachegit clone --depth 1 https://github.com/rshankras/claude-code-apple-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/rshankras/claude-code-apple-skills/http-cache)<a href="https://agentmods.dev/skills/rshankras/claude-code-apple-skills/http-cache"><img src="https://agentmods.dev/badge/skills/rshankras/claude-code-apple-skills/http-cache/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/rshankras/claude-code-apple-skills/http-cache"><img src="https://agentmods.dev/badge/skills/rshankras/claude-code-apple-skills/http-cache.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00041 | $0.01406 |
| Opus 5.5 | $0.00016 | $0.00562 |
| Sonnet 5.5 | $0.00008 | $0.00281 |
| Haiku 4.5 | $0.00004 | $0.00141 |
Grade A, and why
http-cache 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.
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.
How it starts
The opening of the file, as written. The whole thing — 183 lines — stays where its author put it; the contents beside it link to each section on GitHub.
HTTP Cache Generator
Generate a production HTTP caching layer that integrates with your existing networking code. Supports Cache-Control directives, ETag/Last-Modified conditional requests, stale-while-revalidate, and offline fallback.
When This Skill Activates
Use this skill when the user:
- Asks to "add HTTP caching" or "cache API responses"
- Wants "offline support" or "offline fallback"
- Mentions "reduce API calls" or "cache network responses"
- Asks about "ETag" or "conditional requests" or "304 Not Modified"
- Wants "stale-while-revalidate" behavior
Pre-Generation Checks
1. Project Context Detection
- Check Swift version (requires Swift 5.9+)
- Check deployment target (iOS 16+ / macOS 13+)
- Search for existing caching implementations
- Identify source file locations
2. Networking Layer Detection
Search for existing networking code:
Glob: **/*API*.swift, **/*Client*.swift, **/*Network*.swift
Grep: "APIClient" or "URLSession" or "HTTPURLResponse"
If networking-layer generator was used, detect the APIClient protocol and generate a decorator that wraps it.
3. Conflict Detection
Search for existing caching:
Glob: **/*Cache*.swift
Grep: "URLCache" or "ResponseCache" or "CachePolicy"
If found, ask user whether to replace or extend.
Configuration Questions
Ask user via AskUserQuestion:
-
Cache storage sizes?
- Small (10 MB memory / 50 MB disk)
- Medium (25 MB memory / 100 MB disk) — recommended
- Large (50 MB memory / 250 MB disk)
-
Caching strategy?
- Respect server Cache-Control headers (standard)
- Cache-first with background revalidation (stale-while-revalidate)
- Manual per-endpoint policies
-
Offline support?
- Yes — serve stale cache when network unavailable
- No — only cache while online
-
Integration style?
- Decorator wrapping existing APIClient (recommended if networking-layer exists)
- Standalone cache you call directly
Generation Process
What ships with it
2 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.
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 · 183 lines · 41 tokens per session scan A 9711ac6240f6
http-cache is a skill published in the GitHub repository rshankras/claude-code-apple-skills (816 stars, last pushed 2mo ago), licensed MIT. It adds 41 tokens to every session and 1,406 once invoked, about $0.0002 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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