Offer Testing
Use when designing copy experiments to optimize hooks, offers, and CTAs.
by GTM Agents·Apache-2.0·★ 230 on GitHub·updated 2026-04-03
claude plugin marketplace add gtmagents/gtm-agentsWhat this skill does
- 1Writes a clear hypothesis stating the expected lift and the rationale behind the test.
- 2Selects a single variable to isolate: hook, CTA, body copy, offer framing, or proof element.
- 3Defines audience splits, holdouts, and sample size requirements per channel before launch.
- 4Specifies primary KPI and guardrails (opens, CTR, CVR, CPL, unsubscribes, spam rate).
- 5Analyzes results using chi-square, z-test, or Bayesian method and logs outcomes in a shared repository.
When to use
- Planning subject line, CTA, or offer tests across email campaigns, ads, or landing pages.
- Validating new positioning or pricing language before rolling it out broadly.
- Running a copy refresh cycle with structured experiments to identify what drives conversion.
- Prioritizing a backlog of copy experiments using ICE or RICE scoring.
Best for
Marketing ManagerProduct Marketing Manager
Format
FrameworkTemplatePlaybook
Frequently asked questions
What is Offer Testing?
Offer Testing is a Claude Code skill for content by GTM Agents. Use when designing copy experiments to optimize hooks, offers, and CTAs.
When should I use Offer Testing?
Planning subject line, CTA, or offer tests across email campaigns, ads, or landing pages. Validating new positioning or pricing language before rolling it out broadly.
How do I install Offer Testing?
Run the install command (claude plugin marketplace add gtmagents/gtm-agents). Once the skill is in place, Claude Code loads it automatically whenever a task matches what it does.
Is Offer Testing free to use?
Yes. Offer Testing is open source under the Apache-2.0 license, published in the gtmagents/gtm-agents repository on GitHub.
Source repository
gtmagents/gtm-agents★ 230 · 39 forks
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