/subject-line-lab
Mine your actual subject-line history from Klaviyo / Mailchimp / Rule / Get a Newsletter, find the patterns that work for YOUR list, and generate tuned candidates
$ npx -y skills add cognyai/claude-code-marketing-skills --skill subject-line-lab --agent claude-codeHow it fires
How this skill gets triggered: by you, by Claude, or both.
- Fires itselfAuto-invocation. Claude auto-loads it when your prompt matches the work.
- You can call itInvoke it directly when you want it.
- Slash command
/subject-line-lab
Context preview
The summary Claude sees to decide when to auto-load this skill.
Mine your actual subject-line history from Klaviyo / Mailchimp / Rule / Get a Newsletter, find the patterns that work for YOUR list, and generate tuned candidates
AI marketing skills for Claude Code, Cursor, Windsurf, and other AI coding tools. Audit SEO, analyze ads, research competitors, qualify leads — all from your terminal. Free skills need no account. Premium skills connect your real data for $9/mo.
Repo: cognyai/claude-code-marketing-skills
Other skills on claude-code-marketing-skills.
- /ad-copy-writer
Generate ad copy variations for Google, Meta, and LinkedIn Ads
Open skill - /brand-kit
Build a portable brand-kit.json for the user's product — colors, typography, voice — that other skills (video, ad creative, landing page) can consume. Multiple discovery paths so it works whether the user has access to their site's source code or only a public URL or just a logo
Open skill - /cogny
Run Cogny marketing analysis tasks — fetch scheduled tasks, analyze ad accounts via MCP, report findings
Open skill - /community-pulse
Weekly read on Discord community health — joins, active channels, top contributors, themes, and unanswered questions
Open skill - /competitor-analysis
Research competitor positioning, ads, pricing, and market gaps
Open skill - /conversion-debug
Conversion Tracking Debugger — diagnose discrepancies across GTM, GA4, Google Ads & Meta Pixel with live API access, BigQuery validation queries, and troubleshooting flowcharts
Open skill

