Reference benchmarks for CAC, CPL, ROAS, and payback across channels
Install
npx skills add gtmagents/gtm-agents --skill roi-benchmark-librarynpx skills add gtmagents/gtm-agents --skill roi-benchmark-library -a claude-code -gnpx skills add gtmagents/gtm-agents --skill roi-benchmark-library -a codex -ggemini skills install https://github.com/gtmagents/gtm-agents.git --path plugins/marketing-analytics/skills/roi-benchmark-librarygh skill install gtmagents/gtm-agents roi-benchmark-librarygit clone --depth 1 https://github.com/gtmagents/gtm-agents /tmp/gtmagents__gtm-agents
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/gtmagents__gtm-agents/plugins/marketing-analytics/skills/roi-benchmark-library ~/.claude/skills/roi-benchmark-library # Claude Code
cp -R /tmp/gtmagents__gtm-agents/plugins/marketing-analytics/skills/roi-benchmark-library ~/.agents/skills/roi-benchmark-library # Codex, Cursor, Gemini CLI, Copilot, OpenCode