aaron-marketing-skills is a collection of 120 AI-agent skills covering marketing work such as brand narrative, search optimization, social media, email, advertising, influencer campaigns, and launches. Marketers and agent users can install it as a plugin, use its portable skills, or run its described bot team. The catalogue entries are components of this marketing workflow.
Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/aaron-he-zhu/aaron-marketing-skillsnpx agentmods add skills/aaron-he-zhu/aaron-marketing-skills/subject-line-labWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/aaron-he-zhu/aaron-marketing-skills/subject-line-lab)<a href="https://agentmods.dev/skills/aaron-he-zhu/aaron-marketing-skills/subject-line-lab"><img src="https://agentmods.dev/badge/skills/aaron-he-zhu/aaron-marketing-skills/subject-line-lab/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/aaron-he-zhu/aaron-marketing-skills/subject-line-lab"><img src="https://agentmods.dev/badge/skills/aaron-he-zhu/aaron-marketing-skills/subject-line-lab.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00170 | $0.03380 |
| Opus 5 | $0.00085 | $0.01690 |
| Sonnet 5 | $0.00034 | $0.00676 |
| Haiku 4.5 | $0.00017 | $0.00338 |
Grade A, and why
subject-line-lab scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 97 lines — stays where its author put it; the contents beside it link to each section on GitHub.
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.
Skill Contract
Expected output: a subject-line + preheader variant set (3-8 variants, each with a stable variant id and an angle label) and a per-variant heuristic pre-score card covering spam-trigger flags, desktop + mobile length/truncation, emoji count, and the rendered inbox preview — plus a ranked shortlist of survivors and the standard handoff summary for memory/email/subject-line-lab/.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 10d ago Changed 6b7431ad52a5
- 13d ago First seen · 97 lines · 170 tokens per session scan A 441793a7ecd7
subject-line-lab is a skill published in the GitHub repository aaron-he-zhu/aaron-marketing-skills (2,767 stars, last pushed today), licensed Apache-2.0. It adds 170 tokens to every session and 3,380 once invoked, about $0.0009 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
geo-visibility-check
One-shot GEO audit: does your brand appear in Claude, ChatGPT, and Gemini answers for the buyer questions that matter? Runs a prompt panel through the engines with citation tracing and reports per-prompt verdicts, who wins instead, and which sources the answers come from.
geo-optimizer-skill
Run geo audit first. It scores the site 0–100 across 8 categories and generates a prioritized action list.
geo-loop
Run one bounded eGEOagents loop iteration over a workspace domain - read the charter and fresh collector data, do ONE unit of work, write substrate artifacts, append one Timeline entry and one LOG line. Use for loop mode, /geo:loop, scheduled GEO runs, or continuous monitoring.
content-scoring
Score content against the 10 GEO criteria with evidence and prioritized fixes. Use when users ask to score, rate, evaluate, or estimate ranking strength.
competitive-analysis
Analyze AI-search competitors for a query and recommend ranking strategy. Use when users ask competitor analysis, who ranks, or competitive landscape.
schema-generator
Generate JSON-LD schema markup for pages and content types with an implementation checklist. Use when users ask for schema, structured data, rich snippets, or markup.