LLM Gateway Engineer AI Skill - Quirin
Build the LLM gateway: route by measured quality and cost, cache and fall back safely, and pin versions so nothing shifts underneath you.
SkillClaude skill package instant downloadquirin-llm-gateway-routing-engineer.skill
Use it in your own AI today: connect once, then ask for LLM Gateway Engineer AI Skill - Quirin by name.
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Example
You: Our LLM bill is unattributable and a provider update broke our output last month. Put a gateway in front of it.
AI: Quirin returns a gateway architecture with credential isolation and PII redaction at the boundary, routing rules derived from a measured quality and cost comparison pe...
This is not an app. It's an expert you add to your own AI.
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Ask your AI for it by name, or pick it in your dashboard. No need to buy the file.
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// the file itself
The first lines of the file your AI will read, exactly as delivered. Nothing rewritten for the page.
You are Quirin, an LLM Gateway and Model Routing Engineer who labels thirty days of traffic by task class before writing a routing rule. You have been activated to own the control plane in front of every model call.
// what's inside
Platform teams whose LLM spend is unattributable and whose product changed behaviour after a provider update.
// two ways to get it
$12/mo cancel anytime, or $69 a year
This skill alone is $19. All 2,500+ are $12/mo.
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Already on All-in-one? This one is included, no need to buy the file.
// ask your assistant
Go to kissmyskills.com/pages/connector and set up the "LLM Gateway Engineer AI Skill - Quirin" skill (handle: quirin-llm-gateway-routing-engineer) for me
Paste it into Claude, ChatGPT, Claude Code, Cursor or Codex. Your AI walks you through connecting KissMySkills (about 3 minutes, free sign-in) and loads the skill. What your AI will read →
Drop Quirin into Claude and get a gateway engineer who pins model versions so a provider update cannot silently change your product overnight.
Quirin owns the control plane in front of every model call: gateway architecture and why calls should never go direct to a provider; model routing by task, quality tier and cost with rules derived from measurement rather than guesswork; cascading and fallback chains across providers and regions; semantic and exact-match caching with invalidation; rate limit handling, queuing and backpressure; per-team and per-feature quotas and spend controls; API key management and credential isolation; request and response logging with PII redaction at the gateway; streaming pass-through and its complications; prompt and model version pinning; provider outage response and where a multi-provider abstraction leaks; and measuring what routing actually saved rather than what it was projected to save.
What you get
How to install
Download the .skill package → open Claude → paste SKILL.md into your Project Instructions or system prompt → describe your requirement → Quirin builds the answer. Includes a full worked example so you see exactly what you get.
After checkout, the download link lands in your inbox. Save the .skill file: Claude takes it as it is.
Any AI chat you already use: Claude, ChatGPT, Gemini, Grok, Copilot or another.
Claude: turn on code execution in Settings → Capabilities, then Customize → Skills → + → Create skill → Upload a skill and pick the .skill file. ChatGPT, Gemini and others: open the .skill file like a .zip archive and paste SKILL.md into custom instructions or Project instructions.
Your AI is now configured as a specialist. Ask it anything inside its domain.
No technical knowledge required.
Build the LLM gateway: route by measured quality and cost, cache and fall back safely, and pin versions so nothing shifts underneath you. Load it once into Claude Projects and you get a configured LLM Gateway & Model Routing Engineer without re-explaining context at the start of every session. Measure the model on your own data before trusting any public benchmark, keep a human in the loop wherever a wrong answer is expensive, and state the failure modes as plainly as the wins.
Download the .skill package (it contains SKILL.md), then, in Claude, turn on code execution in Settings → Capabilities and add it under Customize → Skills → + → Create skill → Upload a skill (in ChatGPT, Gemini or another AI, open it as a .zip and paste SKILL.md into Project instructions or custom instructions), add your own context and start your first session. Works with Claude, ChatGPT, or any AI chat that accepts system prompts.
Works with Claude (recommended), ChatGPT, Gemini, Perplexity and Copilot, and any AI chat that accepts system prompts. Claude Projects gives the best results.
Without a skill file your AI starts every session as a general assistant. With Quirin loaded it applies LLM Gateway & Model Routing Engineer methodology from the first message, with consistent quality every time. Measure the model on your own data before trusting any public benchmark, keep a human in the loop wherever a wrong answer is expensive, and state the failure modes as plainly as the wins.
This one and 2,500+ others, inside Claude, ChatGPT, Claude Code, Codex or Cursor. Cancel anytime.
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