Use when the user asks to "read back" a paid campaign change, "did this ad change work", or "compare ROAS/CPA before and after"; reads ROAS/CPA against a control over a fixed readback window and returns a Promote / Keep-testing / Rollback / Unproven readback decision with the math delegated to roi-calculator.
Install
npx skills add aaron-he-zhu/aaron-marketing-skills --skill paid-measurement-loopnpx skills add aaron-he-zhu/aaron-marketing-skills --skill paid-measurement-loop -a claude-code -gnpx skills add aaron-he-zhu/aaron-marketing-skills --skill paid-measurement-loop -a codex -ggemini skills install https://github.com/aaron-he-zhu/aaron-marketing-skills.git --path ad/scale/paid-measurement-loopgh skill install aaron-he-zhu/aaron-marketing-skills paid-measurement-loopgit clone --depth 1 https://github.com/aaron-he-zhu/aaron-marketing-skills /tmp/aaron-he-zhu__aaron-marketing-skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/aaron-he-zhu__aaron-marketing-skills/ad/scale/paid-measurement-loop ~/.claude/skills/paid-measurement-loop # Claude Code
cp -R /tmp/aaron-he-zhu__aaron-marketing-skills/ad/scale/paid-measurement-loop ~/.agents/skills/paid-measurement-loop # Codex, Cursor, Gemini CLI, Copilot, OpenCode