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 ItamarZand88/awesome-agent-conventions --skill newsletter-writergit clone --depth 1 https://github.com/ItamarZand88/awesome-agent-conventionsWrote 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/itamarzand88/awesome-agent-conventions/newsletter-writer)<a href="https://agentmods.dev/skills/itamarzand88/awesome-agent-conventions/newsletter-writer"><img src="https://agentmods.dev/badge/skills/itamarzand88/awesome-agent-conventions/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/itamarzand88/awesome-agent-conventions/newsletter-writer"><img src="https://agentmods.dev/badge/skills/itamarzand88/awesome-agent-conventions/newsletter-writer.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 | $0.00000 | $0.00701 |
| Opus 5 | $0.00000 | $0.00351 |
| Sonnet 5 | $0.00000 | $0.00140 |
| Haiku 4.5 | $0.00000 | $0.00070 |
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 13d 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 — 55 lines — stays where its author put it; the contents beside it link to each section on GitHub.
name: newsletter-writer description: "Write a full creator newsletter issue — subject line, preview text, hook, body with a clear takeaway, and a CTA — in the writer's voice, for Substack, beehiiv, ConvertKit, or email. Use when asked to write a newsletter, an email issue, a Substack post, or to turn notes/a topic into a sendable newsletter. Produces a ready-to-send issue with subject-line options and a skimmable structure. Distinct from B2B drip/nurture sequences."
Newsletter Writer Skill
A newsletter is a relationship, not a broadcast. The best issues open a loop in the subject line, reward the open in the first sentence, deliver one clear idea, and make the next step obvious. This skill writes that issue — in your voice, ready to send.
Working from a brief
Given a topic, notes, or a piece to adapt, write the full issue anyway. Infer the audience and the single idea; mark invented specifics (assumed — replace). Don't hedge with "in this issue we'll explore…" — get to the value.
Required Inputs
Ask for (if not already provided):
- Topic / notes / source for the issue
- Audience and voice (or pull from a [[creator-brand-kit]])
- Goal / CTA (reply, click, subscribe-upgrade, share) and rough length
- Platform (Substack / beehiiv / ConvertKit / plain email) for formatting norms
Output Format
Subject lines
5 options, mixing curiosity, specificity, and benefit — each ≤ ~50 characters. Star the recommended one.
Preview text
One line (~80 chars) that complements (doesn't repeat) the subject.
The issue
- Hook — first 1–2 sentences that reward the open and set up the idea.
- Body — one core idea, in short scannable paragraphs/sub-headers, with a concrete example or story. No throat-clearing.
- The takeaway — the one thing to remember, stated plainly (a callout line works well).
- CTA — a single clear next step matching the goal.
- PS — optional, often the most-read line; use it for a secondary nudge or personal note.
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.
- 13d ago First seen · 55 lines · 0 tokens per session scan A 5493c754685e
newsletter-writer is a skill published in the GitHub repository ItamarZand88/awesome-agent-conventions (31 stars, last pushed 1mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 701 tokens. 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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