Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add coleschaffer/copywritingskills-rmbc --skill email-promogit clone --depth 1 https://github.com/coleschaffer/copywritingskills-rmbcWrote 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/coleschaffer/copywritingskills-rmbc/email-promo)<a href="https://agentmods.dev/skills/coleschaffer/copywritingskills-rmbc/email-promo"><img src="https://agentmods.dev/badge/skills/coleschaffer/copywritingskills-rmbc/email-promo/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/coleschaffer/copywritingskills-rmbc/email-promo"><img src="https://agentmods.dev/badge/skills/coleschaffer/copywritingskills-rmbc/email-promo.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00028 | $0.01598 |
| Opus 5 | $0.00014 | $0.00799 |
| Sonnet 5 | $0.00006 | $0.00320 |
| Haiku 4.5 | $0.00003 | $0.00160 |
Grade A, and why
email-promo 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 11d 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 — 159 lines — stays where its author put it; the contents beside it link to each section on GitHub.
email-promo
Purpose
Generate promotional email copy structured around RMBC principles. Emails are short-form DR — every word must earn its place. The subject line is the hook (determines open rate), the preview text is the subhook (supports the open), and the body must drive a single click. This skill produces complete email copy including 3 subject line variants for A/B testing, preview text, body copy, CTA, and PS line. Output adapts to email type: launch, flash sale, cart recovery, or content-to-sale bridge.
Inputs
| Input | Required | Description |
|---|---|---|
product_description |
Yes | What the product is, what it does, key features/ingredients/components |
target_audience |
Yes | Who the prospect is — demographics, pain points, desires, sophistication level |
offer_details |
Yes | Price, discount, deadline, bonuses, or whatever makes this email worth sending now |
email_type |
Yes | One of: launch, flash_sale, cart_recovery, content_to_sale |
key_mechanism |
No | The product's unique mechanism (output from /mechanism-ideation) |
sender_voice |
No | One of: founder, brand, expert, friend (default: founder) |
Execution Protocol
Step 1 — Load Framework Context
Read rmbc-context/SKILL.md to load RMBC framework definitions. Email applies RMBC in compressed form — Research drives subject line targeting, Mechanism is teased (not fully revealed — that's the landing page's job), Brief structures the email arc, Copy executes with economy.
Step 2 — Define Email Structure by Type
| Type | Structure | Tone | Length |
|---|---|---|---|
| Launch | Announcement → mechanism tease → offer → scarcity → CTA | Excitement + authority | 300-500 words |
| Flash Sale | Urgency → offer → proof → deadline → CTA | Direct + urgent | 200-350 words |
| Cart Recovery | Reminder → objection handling → guarantee → CTA | Empathetic + helpful | 150-250 words |
| Content-to-Sale | Value content → bridge → product mention → soft CTA | Educational + subtle | 400-600 words |
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.
- 11d ago First seen · 159 lines · 28 tokens per session scan A 2f2230821e47
email-promo is a skill published in the GitHub repository coleschaffer/copywritingskills-rmbc (30 stars, last pushed 5mo ago), licensed MIT. It adds 28 tokens to every session and 1,598 once invoked, about $0.0001 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.
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