スキル（プラグイン）

npx @refrainai/cli generate -- \
  --url "https://docs.google.com/spreadsheets/d/..." \
  --goal "Sheet1 から Sheet2 にデータをコピー" \
  --output ./sheets-flow.yaml \
  --skill google-sheets

--skill google-sheets,another-skill

const report = await client.execute(runbook, {
  skills: ["google-sheets"],
});