メニュー
Given a spend profile and travel goals, design the optimal 2-3 card stack — which cards to hold, which category each card wins, and whether the annual fees justify the benefits.
Codex または Claude でインストール この Prompt をコピーして Codex、Claude、または他のアシスタントに貼り付けると、Skill ページを確認してインストールできます。
SOC 職業分類に基づく
Strategy guide for finding award space — when to search, which tools to use, how far out to look, and how to unlock availability that doesn't show online. Pairs with booking-process for execution.
Evaluate current credit card sign-up bonuses against historical highs. Apply/wait/skip verdict per card. Checks live sources and flags elevated offers before they expire.
End-to-end award booking process — from finding space to confirmed ticket. Covers search tools, transfer timing, phone scripts, and what to do when it breaks. Never lose an award seat to a timing mistake again.
Audit the Eidos Travel Hub for stale data, missing skills, broken playbook steps, and index misalignment. Returns a scored health report with severity-ranked findings and copy-pasteable fixes.
Propose improvements to the Eidos Travel Hub — new skills, updated bonus data, corrected award charts, new transfer partners, or playbook gaps. Motivated by a real gap in a travel hacking scenario.
Given an airport, terminal, and your card/status inventory, find every lounge you can access, how to get in, and whether guests are included. No more wandering the terminal.
| name | credit-card-stack |
| description | Given a spend profile and travel goals, design the optimal 2-3 card stack — which cards to hold, which category each card wins, and whether the annual fees justify the benefits. |
Most people are leaving 1–2% on the table by putting everything on one card. The right stack is 2-3 cards that cover all major spend categories, justified by annual fee math.
{
"$schema": "https://json-schema.org/draft/2020-12",
"title": "Credit Card Stack",
"purpose": "Design an optimal credit card stack for a given spend profile and travel goal. Show which card wins each category, estimate annual value, and prove the annual fees are justified.",
"constraints": [
"Stack should be 2-4 cards maximum — complexity kills compliance",
"Annual fee math must be explicit: benefits_value - annual_fees = net_value",
"Flag 5/24 status if Chase cards are recommended (Chase rejects if 5+ new cards in 24 months)",
"Flag if user mentioned existing cards that conflict (e.g. already has Sapphire Preferred → recommend Reserve upgrade path or vice versa)",
"Include a 'day one' action: what to apply for first and why"
],
"required": ["spend_profile", "travel_goal", "stack", "annual_fee_math", "day_one"],
"properties": {
"spend_profile": { "type": "object", "description": "Category → annual spend in dollars" },
"travel_goal": { "type": "string" },
"stack": {
"type": "array",
"items": {
"required": ["card", "annual_fee", "wins_categories", "key_benefits", "estimated_annual_value"],
"properties": {
"card": { "type": "string" },
"annual_fee": { "type": "integer" },
"wins_categories": { "type": "array", "items": { "type": "string" } },
"key_benefits": { "type": "array", "items": { "type": "string" } },
"estimated_annual_value": { "type": "integer", "description": "Dollars of value: points + credits + perks" },
"signup_bonus": { "type": ["string", "null"] }
}
}
},
"annual_fee_math": {
"type": "object",
"required": ["total_fees", "total_value", "net_value"],
"properties": {
"total_fees": { "type": "integer" },
"total_value": { "type": "integer" },
"net_value": { "type": "integer" }
}
},
"day_one": { "type": "string", "description": "First card to apply for and why" },
"warnings": { "type": "array", "items": { "type": "string" } }
}
}
The MR Maximizer (Amex-heavy, high spend)
The UR Engine (Chase-heavy, flexibility)
The Hybrid (best of both, complex but powerful)
The Lean Stack (2 cards, low complexity)