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 swan-gtm/gtm-skills --skill newsletter-welcome-giftgit clone --depth 1 https://github.com/swan-gtm/gtm-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/swan-gtm/gtm-skills/newsletter-welcome-gift)<a href="https://agentmods.dev/skills/swan-gtm/gtm-skills/newsletter-welcome-gift"><img src="https://agentmods.dev/badge/skills/swan-gtm/gtm-skills/newsletter-welcome-gift/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/swan-gtm/gtm-skills/newsletter-welcome-gift"><img src="https://agentmods.dev/badge/skills/swan-gtm/gtm-skills/newsletter-welcome-gift.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 | $0.00181 | $0.01120 |
| Opus 5 | $0.00090 | $0.00560 |
| Sonnet 5 | $0.00036 | $0.00224 |
| Haiku 4.5 | $0.00018 | $0.00112 |
Grade A, and why
newsletter-welcome-gift 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 9d 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 — 104 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Newsletter Welcome Gift Brainstormer
What This Skill Does
Generates 10 welcome gift ideas tailored to the user's newsletter niche and audience — using proven lead magnet formats that deliver immediate value and make subscribing a no-brainer.
Each idea includes:
- A compelling gift title
- The format (what type of deliverable it is)
- The core promise (exact outcome subscriber will achieve)
- Why it converts (how it solves an immediate pain point)
- Time to value (how quickly they can implement and see results)
The Interview (Ask All 3 Questions Upfront)
Collect all answers in one message before generating anything:
- Newsletter name + topic/niche — What does your newsletter focus on?
- Target audience — Who subscribes and what's their role/demographic?
- Audience's top 3 pain points — What specific problems do they face daily?
The Prompt
Once you have the inputs, run the following with their details filled in:
OBJECTIVE
You're a newsletter growth strategist who helps creators develop irresistible "welcome gifts" (think: lead magnets) to increase opt-in rates.
Your specific task is to analyze a newsletter's audience and niche to generate compelling lead magnet ideas that provide immediate value to the reader, making the newsletter value prop more compelling.
YOUR GOAL
Generate 10 welcome gift lead magnet ideas that could solve urgent problems for my newsletter's target audience while showcasing my expertise and increasing my opt-in rates.
WELCOME GIFT FRAMEWORK
Importantly, each welcome gift idea needs to be congruent with my newsletter value prop.
Also, use these proven lead magnet formats to brainstorm welcome gift ideas — each one should deliver results in under 30 minutes:
- Problem-Solving Templates — Fill-in-the-blank tools that remove guesswork
- Mini-Courses — 3-5 lesson sequences that teach one specific skill
- Resource Toolkits — Curated collections of tools, links, or materials
- Assessment Tools — Quizzes or calculators that provide personalized insights
- Swipe Files — Copy-paste examples, scripts, or frameworks
- Quick Reference Guides — Cheat sheets or condensed how-to materials
- Mistake-Prevention Lists — "Avoid these errors" compilations
- Case Study Breakdowns — Real examples with actionable takeaways
- Planning Worksheets — Strategic planning documents for specific goals
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.
- 9d ago First seen · 104 lines · 181 tokens per session scan A 1387758929c8
newsletter-welcome-gift is a skill published in the GitHub repository swan-gtm/gtm-skills (150 stars, last pushed 2d ago), licensed MIT. It adds 181 tokens to every session and 1,120 once invoked, about $0.0009 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 2026-09-03.
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