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 Livus-AI/Skills-MCP --skill newsletter-expandergit clone --depth 1 https://github.com/Livus-AI/Skills-MCPWrote 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/livus-ai/skills-mcp/newsletter-expander)<a href="https://agentmods.dev/skills/livus-ai/skills-mcp/newsletter-expander"><img src="https://agentmods.dev/badge/skills/livus-ai/skills-mcp/newsletter-expander/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/livus-ai/skills-mcp/newsletter-expander"><img src="https://agentmods.dev/badge/skills/livus-ai/skills-mcp/newsletter-expander.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 | $0.00042 | $0.00894 |
| Opus 5 | $0.00021 | $0.00447 |
| Sonnet 5 | $0.00008 | $0.00179 |
| Haiku 4.5 | $0.00004 | $0.00089 |
Grade A, and why
newsletter-expander 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 12d 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 — 131 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Newsletter Expander Skill
Transform a research brief into a detailed, engaging newsletter issue that delivers on the value promised in social media CTAs.
Required Inputs
- Research Brief - Output from
content-researchskill - Author Name - For sign-off
- Newsletter Name (optional) - For branding
Newsletter Structure
| Section | Purpose | Length |
|---|---|---|
| Subject Line | Drive opens | 5-10 words |
| Personal Intro | Connect with reader | 2-3 sentences |
| The Big Story | Set context | 1 paragraph |
| Key Developments | Deep analysis | 1 paragraph each |
| By the Numbers | Data analysis | 1 paragraph |
| What This Means | Actionable guide | 2-3 paragraphs |
| Final Thoughts | Wrap up | 2-3 sentences |
Output Format
**Subject:** [Intriguing subject line that creates curiosity]
Hi [First Name],
[Personal intro - why this topic matters right now, connect to reader's world]
---
## The Big Story: [Core Narrative]
[Deeper context setting the stage - what's happening and why it matters]
---
## 1. [Key Development 1]
[Expanded explanation with context, implications, and links to sources. What does this mean for the reader? Why should they care?]
## 2. [Key Development 2]
[Expanded explanation with context, implications, and links to sources.]
## 3. [Key Development 3]
[Expanded explanation with context, implications, and links to sources.]
---
## By the Numbers
> [Surprising statistic]
[Analysis of what this data reveals. Why is it significant? What trend does it indicate? How does it compare to previous benchmarks?]
---
## What This Means For You
[Turn the actionable takeaway into a mini-guide]
**Here's how to apply this:**
1. [Step 1 - specific action]
2. [Step 2 - specific action]
3. [Step 3 - specific action]
[Additional context or alternative approaches]
---
## Final Thoughts
[Concluding summary - reinforce the key message and offer a forward-looking perspective]
Cheers,
[Author Name]
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.
- 12d ago First seen · 131 lines · 42 tokens per session scan A 3bfb3c3e2fce
newsletter-expander is a skill published in the GitHub repository Livus-AI/Skills-MCP (2 stars, last pushed 3mo ago), licensed MIT. It adds 42 tokens to every session and 894 once invoked, about $0.0002 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 2026-08-31.
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