growth-marketer — Claude Code skill: what it does and setup
Plan experiments, inspect the AARRR funnel, and compare acquisition channels with this skill. Use it to choose a growth metric or assess a test idea.
npx skills add borghei/Claude-Skills --skill growth-marketer -a claude-codeWhat growth-marketer does
The skill guides work from choosing a North Star Metric and mapping AARRR stages to ranking experiments with ICE and reviewing their results. It can also help compare acquisition channels by CAC and traffic quality, examine retention, and forecast growth using churn and viral coefficient.
It includes an A/B test document template and Python functions for sample-size calculations and growth forecasts. The sample-size function uses scipy and needs a current conversion rate plus a minimum effect to detect. Without those inputs, the test estimate has no defined basis.
Before proposing a plan, the skill asks for the metrics and traffic details that matter to the request. If the user wants an immediate answer, it states its assumptions instead. The examples include retention and CAC benchmarks, while the analysis can use product-specific figures.
What it helps with
- choose a metric tied to customer value
- map conversion across AARRR stages
- rank experiment ideas with ICE scoring
- estimate the sample needed for an A/B test
- compare acquisition channels by CAC and traffic quality
Example prompts for the agent
- Review our AARRR funnel and tell me which figures are needed to assess each stage.
- Draft an A/B test plan for our new onboarding, including a hypothesis, metrics, and decision criteria.
- Compare our acquisition channels by CAC and traffic quality, then rank them.
How to install growth-marketer
1Skills CLI (Vercel)
npx skills add borghei/Claude-Skills --skill growth-marketer -a claude-code2Manually: put the files in place
~/.claude/skills/growth-marketer/SKILL.mdCopy the whole skill folder; for one project use .claude/skills/growth-marketer/
1Skills CLI (Vercel)
npx skills add borghei/Claude-Skills --skill growth-marketer -a codex2Manually: put the files in place
.agents/skills/growth-marketer/SKILL.mdFor all projects use ~/.agents/skills/
1Skills CLI (Vercel)
npx skills add borghei/Claude-Skills --skill growth-marketer -a cursor2Manually: put the files in place
.cursor/skills/growth-marketer/SKILL.mdCursor also reads .agents/skills/ and .claude/skills/
1GitHub CLI
gh skill install borghei/Claude-Skills growth-marketer2Manually: put the files in place
.github/skills/growth-marketer/SKILL.md1Skills CLI (Vercel)
npx skills add borghei/Claude-Skills --skill growth-marketer -a gemini-cli2Platform CLI
gemini skills install https://github.com/borghei/Claude-Skills --path marketing/growth-marketerManually: put the files in place
.devin/skills/growth-marketer/SKILL.mdThe legacy .windsurf/skills/ path still works
Skills CLI (Vercel)
npx skills add borghei/Claude-Skills --skill growth-marketer -a opencodeClaude.ai
Zip the folder and upload it in Settings → Capabilities → Skills
Step by step, with commands for each platform: How to install skills in Claude Code: five ways
Questions about growth-marketer
How do I install growth-marketer in Claude Code?
Run npx skills add borghei/Claude-Skills --skill growth-marketer -a claude-code. The skill file is at ~/.claude/skills/growth-marketer/SKILL.md.
What does growth-marketer do?
It supports AARRR funnel analysis, experiment planning, and acquisition-channel evaluation. It also provides an experiment template and Python functions for sample sizing and growth forecasts.
What does the skill need to estimate an A/B test sample?
It needs the current conversion rate and the smallest effect the test should detect. The calculation uses the Python library scipy.
