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skills/offer-testing/SKILL.md

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+---
+name: offer-testing
+description: Use when designing copy experiments to optimize hooks, offers, and CTAs.
+---
+
+# Offer Testing Playbooks Skill
+
+## When to Use
+- Planning subject line/CTA/offer tests across email, ads, or landing pages.
+- Validating new positioning or pricing language.
+- Running copy refresh cycles for campaigns.
+
+## Framework
+1. **Hypothesis** – statement of expected lift + rationale.
+2. **Variable Selection** – hook, CTA, body copy, offer framing, proof element.
+3. **Segmentation** – define audience splits and holdouts.
+4. **Metrics** – primary KPI + guardrails (opens, CTR, CVR, CPL, unsub, spam).
+5. **Analysis** – statistical significance (chi-square, z-test) or Bayesian approach.
+
+## Templates
+- Experiment brief (variable, control, variant, KPI, sample size, duration).
+- Results report (metric table, significance, insight, next steps).
+- Prioritization matrix (ICE/RICE scoring).
+
+## Tips
+- Limit to one variable per test to isolate learnings.
+- Ensure minimum sample sizes per channel before declaring winners.
+- Log tests and learnings in a shared repository.
+
+---