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 naveedharri/benai-skills --skill newsletter-writergit clone --depth 1 https://github.com/naveedharri/benai-skillsWrote 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/naveedharri/benai-skills/newsletter-writer)<a href="https://agentmods.dev/skills/naveedharri/benai-skills/newsletter-writer"><img src="https://agentmods.dev/badge/skills/naveedharri/benai-skills/newsletter-writer/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/naveedharri/benai-skills/newsletter-writer"><img src="https://agentmods.dev/badge/skills/naveedharri/benai-skills/newsletter-writer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- 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 | $0.00119 | $0.03214 |
| Opus 5 | $0.00060 | $0.01607 |
| Sonnet 5 | $0.00024 | $0.00643 |
| Haiku 4.5 | $0.00012 | $0.00321 |
Grade A, and why
newsletter-writer 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 today.
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 — 229 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Ben's Newsletter Writer
Write high-performing newsletters in Ben Van Sprundel's exact voice, tone, and structure — from any source. This is an interactive, multi-step process. Never skip steps or combine them. Every step requires user input before proceeding to the next.
Do not use Excalidraw, diagram tools, or any visualization tools at any point. This skill produces text only.
Context anchor: Ben AI's positioning is "Use AI better than 99% for real business purposes." We serve existing businesses and professionals who want to become AI-first inside their current role or company. We do NOT teach people to "start an AI business from scratch" — that positioning is retired. Every newsletter must reflect the current ICP, pain points, and offer stack defined in the reference files.
STEP 0 — Identify the source
Ask Ben which source the newsletter is based on, and present these three options for him to choose from:
- Idea or insight (I'll describe it)
- Article URL
- YouTube video URL
Default expectation: Per the current content strategy, newsletters are repurposed from YouTube only. If Ben picks 2 or 3, proceed. If he picks 1, confirm this is intentional and proceed.
If YouTube URL selected:
Use the Apify YouTube transcript scraper tool (topaz_sharingan/Youtube-Transcript-Scraper-1) to fetch the full transcript. Pass the URL as the startUrls input. Output the full transcript text to the conversation so Ben can confirm it looks right before continuing.
If Article URL selected:
Use the Apify RAG web browser (apify/rag-web-browser) to scrape the full article content. Pass the URL as the query input. Extract and present the full article text before continuing.
If Idea / Insight selected: Ask Ben: "Describe your idea or insight — include any examples, angles, or stories you want to weave in."
Do not proceed to Step 1 until the source content is confirmed.
STEP 1 — Read reference files (MANDATORY)
Before suggesting any angles, you MUST read ALL THREE of the following reference files. Do not skip any. Do not proceed to Step 2 until all three have been read.
What ships with it
6 files 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.
- today Changed · +60 lines · +8 tokens per session 6d1f9c0a73e7
- 7d ago First seen · 169 lines · 111 tokens per session scan A 40446c453a10
newsletter-writer is a skill published in the GitHub repository naveedharri/benai-skills (61 stars, last pushed today), licensed MIT. It adds 119 tokens to every session and 3,214 once invoked, about $0.0006 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 2026-09-05.
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