Subject Line Lab
Use when the user asks to "generate subject line variants", "pre-score my subject...
Install
npx skills add aaron-he-zhu/aaron-marketing-skills --skill subject-line-lab -g -a claude-code -y- Repository
- aaron-he-zhu/aaron-marketing-skills3k
- Category
- Design
- Updated
- 3d ago
- License
- Apache-2.0
- Context cost
- Mediumabout 3,000 tokens
- Runs scripts
- No, instructions only
What it does
Use when the user asks to "generate subject line variants", "pre-score my subject lines", or "will this subject get truncated / trigger spam filters"; produces a labeled subject + preheader variant set and a per-variant heuristic pre-score card, spam-trigger flags, length/truncation across desktop + mobile, emoji-count, and the inbox preview render (from-name + subject + preheader), before any test is run. Not for the body copy or CTA, use email-creative-builder; not for the A/B test design or significance read, use send-experiment-designer; not for the profile-weighted EQS or the S1/S2/N1/D1 vetoes, use email-quality-auditor. 邮件主题行生成/主题行预打分/截断与垃圾词检查
Subject Line Lab
Generates a labeled subject-line + preheader variant set and heuristically pre-scores each variant, spam-trigger flags, desktop + mobile length/truncation, emoji count, and the rendered inbox preview (from-name + subject + preheader), so weak candidates are cut before they burn a test cell. This is the pre-test bench for the SEND E (Engagement) lever: it sharpens the subject/preheader unit that email-creative-builder drafts and hands the ranked survivors, each with a stable variant id, to send-experiment-designer.
Scope guard: this skill drafts and pre-scores subject + preheader variants only. It does not write the body copy or CTA (email-creative-builder), design the A/B / send-time test or read out significance (send-experiment-designer), run the full deliverability spam-content scan (deliverability-qa), or compute any SEND dimension score. The heuristic pre-score is a flag, never a verdict: email-quality-auditor owns the profile-weighted EQS and all four vetoes (S1/S2/N1/D1).
Quick Start
Pre-score these 6 subject lines for truncation + spam triggers, from-name [Sender], promo mode: [paste]
Generate 5 subject-line variants + preheaders for [offer], cold-outbound mode, and rank them by pre-score
Show the inbox preview (from-name + subject + preheader) on desktop and mobile for my top 3, and cut anything that truncates the promise
Output: a variant table (labeled SUBJ-A, SUBJ-B, …), a per-variant pre-score card (spam flags, desktop/mobile truncation, emoji count, preview render), and a ranked shortlist of survivors to carry into the test.
