Turn audience comments into evidence-backed offer ideas, landing-page tests, and a 7-day demand validation plan before you build.
A ready-to-execute cost-reduction kit for infra owners: savings across EC2, RDS, S3, Lambda, network/NAT, and EBS with CLI commands and expected savings, a 44-item monthly review checklist, 15 one-hour quick wins, an executive report template, and a worked case study.
marketingskills/skills/ab-testing. Corey Haines`s expert-level skill. It checks detectable lift, traffic limits, safe metrics, QA risk, and locked decision rules before launch. When you provide baseline rate, MDE, power, and traffic, it runs Python sample-size math to estimate required sample size and test duration, so you avoid wasted traffic, broken tracking, peeking, and fake wins. Support Corey Haines on https://buymeacoffee.com/coreyhaines
AI-powered multistore price hunter. Upload a screenshot or product link to compare offers, verify sellers, and find the same product cheaper.
Before you discount, run this once. From your past prices and sales, it measures how price-sensitive your customers are, finds the margin-maximizing price, and shows how much more you must sell to break even on any discount.
AI utility 課金（Claude MAX／GPT Plus／Codex／API spend 等）と 売上・価値産出 を計測し、4段階の ROI 判定（投資拡大／維持／レビュー／削減）＋赤字（DEFICIT）早期検出を行います。Python標準ライブラリのみ・LLM呼び出しゼロ・月額API課金 0円増。毎月の AI 投資が見合っているか明確にしたい AI heavy user 向け。
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