cold-email-subject-line-tester
About this skill
# Subject Line Tester Generate subject line variants from an already-chosen personalization angle, score them against a numeric rubric, and design a statistically honest split test to pick the winner. Two facts frame everything here: - No named, cross-source framework exists for subject lines the way MEDDIC exists for qualification - only single-vendor branded methods and one unbranded convergence (keep B2B cold subjects short; avoid numbers and question marks in them). - Nearly every published subject-line
Security
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When you run npx @agentpowers/cli install cold-email-subject-line-tester, AgentPowers downloads the package to a sandbox and runs a full security scan (ClamAV, Snyk, GuardDog, VirusTotal) before allowing installation. If the scan fails, installation is blocked.
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