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marketingskills

Name: marketingskills (Claude Skill)
Author: coreyhaines31

by coreyhaines31 · coreyhaines31/marketingskills

Growth, CRO, copywriting, SEO, analytics skills bundle for Claude — an in-house marketing team as a plugin.

marketingskills is a bundle of Claude Code skills covering the full marketing surface: conversion rate optimization, growth experiments, copywriting voice, SEO analysis, analytics event taxonomy. Instead of hiring a fractional CMO, you get opinionated skills that operate on your site/app.

▶ Watch demo 📦 Install 💡 Use Cases

Why use it

Key features

Copywriting skill with voice preservation
CRO skill — hypothesis → experiment → readout
SEO skill — keyword research, content gaps, internal linking
Analytics skill — event naming, funnel definition, PostHog/GA wiring
Growth-engineering skill — acquisition channel audits

Live Demo

What it looks like in practice

ready

Install

Author repository · Claude Skills documentation

Use Cases

Real-world ways to use marketingskills

Run a proper CRO experiment cycle on a landing page

👤 Growth teams, founders optimizing funnels ⏱ ~60 min intermediate

When to use: Your landing page converts at 2%, and you want to A/B test your way to 4%.

Flow

Hypothesis

Use marketingskills/cro. Analyze /landing/index.html. Propose 3 high-impact experiment hypotheses with expected lift.✓ Copied

→ Hypotheses reference specific page elements and behavioral data
Design A/B

For hypothesis 1, design the variant. Sample size? Runtime? Kill criteria?✓ Copied

→ Complete experiment spec with stats
Readout

Experiment ran 14 days, B beat A by 18% on signup. Interpret — is this real? What's next?✓ Copied

→ Sober readout with statistical and business reasoning

Outcome: An experiment shipped with discipline, not vibes.

Pitfalls

Peeking at data mid-experiment and calling early — Pre-commit to sample size; skill enforces this in prompts

Combine with: filesystem

Refresh landing-page copy in your brand voice

👤 Founders between copywriter hires ⏱ ~30 min beginner

When to use: Copy feels generic, you know your voice, you don't have time to write it all.

Prerequisites

Brand voice samples — 2–3 paragraphs you know sound right

Flow

Pin voice

Use marketingskills/copy. Here are 3 voice samples: <samples>. Profile my voice.✓ Copied

→ Voice profile: vocabulary, rhythm, attitude
Rewrite

Rewrite /landing/index.html headline, subheadline, and CTAs in my voice. Three variations each.✓ Copied

→ Variants that sound like the samples
Pressure test

Which variant survives the "would I actually say this out loud" test? Defend.✓ Copied

→ One winner picked with reasoning

Outcome: Copy that sounds like you wrote it on a good day.

Pitfalls

Voice drift when asking for length changes — Re-pin the voice samples before every round

Combine with: humanizer-skill

Combinations

Pair with other MCPs for X10 leverage

marketingskills-skill + humanizer-skill

Rewrite then humanize to strip AI tells

Copy-rewrite, then run humanizer.✓ Copied

marketingskills-skill + geo-seo-claude-skill

SEO and GEO together

SEO gaps from marketingskills, GEO fixes from geo-seo-claude.✓ Copied

Tools

What this MCP exposes

Tool	Inputs	When to call
cro_hypotheses	page, data?	Early-stage CRO
copy_rewrite	text, voice_samples	Copy work
seo_gaps	site, competitors	Content strategy
event_taxonomy	app_description	Analytics setup

Cost & Limits

What this costs to run

API quota: N/A
Tokens per call: Varies — copy is cheap, full SEO audits expensive
Monetary: Free (MIT)
Tip: Use copy_rewrite in small batches — headline-at-a-time

Security

Permissions, secrets, blast radius

Minimum scopes: filesystem-read

Credential storage: None

Data egress: None

Troubleshooting

Common errors and fixes

Generic hypothesis output

Provide behavioral data — heatmaps, session recordings, funnel numbers — or acknowledge you're hypothesizing blind

Copy still sounds AI

Run humanizer-skill as a second pass

Event taxonomy conflicts with existing events

Provide current schema; skill will propose additions, not a full rewrite

Alternatives