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 Salesably/salesably-marketplace --skill newslettergit clone --depth 1 https://github.com/Salesably/salesably-marketplaceWrote 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/salesably/salesably-marketplace/newsletter)<a href="https://agentmods.dev/skills/salesably/salesably-marketplace/newsletter"><img src="https://agentmods.dev/badge/skills/salesably/salesably-marketplace/newsletter/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/salesably/salesably-marketplace/newsletter"><img src="https://agentmods.dev/badge/skills/salesably/salesably-marketplace/newsletter.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 | $0.00047 | $0.01771 |
| Opus 5 | $0.00023 | $0.00886 |
| Sonnet 5 | $0.00009 | $0.00354 |
| Haiku 4.5 | $0.00005 | $0.00177 |
Grade A, and why
newsletter 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 — 236 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Newsletter
This skill creates newsletters people actually want to read - not just promotional blasts that get ignored or unsubscribed from.
Objective
Build recurring engagement through newsletters that deliver consistent value, strengthen audience relationships, and naturally drive business goals.
Intake Questions
Before creating newsletter content, gather context:
- Audience: Who are subscribers? What do they care about?
- Frequency: How often do you send? (Daily, weekly, monthly)
- Brand voice: What tone should the newsletter have? (From
brand-voiceskill) - Primary goal: Education, entertainment, conversion, or community?
- Existing content: What blog posts, insights, or resources can be repurposed?
- Unique angle: What can you offer that no other newsletter does?
- Past performance: What formats/topics have worked well or poorly?
The 9 Newsletter Formats
1. Curated Links
Collect the best resources, articles, and tools on a topic so readers don't have to.
Structure:
- Brief intro (2-3 sentences)
- 5-10 curated items with commentary
- Each item: Title, source, your take (why it matters)
- Optional: categorize by theme
Best for: Busy professionals, niche industries, staying current on trends
Example: "The best marketing reads from this week, so you don't have to scroll Twitter."
2. Original Essay
Long-form thinking on a single topic - your perspective, insights, or argument.
Structure:
- Hook: Surprising opening
- Thesis: Main argument/insight
- Body: Supporting points with examples
- Conclusion: Takeaway and implications
Best for: Thought leadership, building authority, deep audience connection
Example: "Why I think content marketing is dead (and what's replacing it)"
3. Story-Driven
Narrative format with a lesson embedded - personal stories, customer stories, or observations.
Structure:
- Set the scene
- Build tension/conflict
- Resolution or realization
- Explicit lesson/takeaway
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 · 236 lines · 47 tokens per session scan A eb5f913644cd
newsletter is a skill published in the GitHub repository Salesably/salesably-marketplace (49 stars, last pushed 8mo ago), licensed MIT. It adds 47 tokens to every session and 1,771 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 2026-08-30.
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