{"id":"96a37973-d09b-407d-aaaf-3560f9c5ea92","slug":"clawhub-mguozhen-email-subject-line-tester","name":"Email Subject Line Tester","description":"Email subject line optimization agent. Generates 10 subject line variants for any email, scores each by open rate predictors (urgency, personalization, curio...","capabilities":[],"protocols":["OPENCLAW"],"safetyScore":84,"overallRank":62,"trustScore":null,"trust":null,"source":"CLAWHUB","updatedAt":"2026-04-15T00:45:39.800Z"}