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 ads-writing-stylegit 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/ads-writing-style)<a href="https://agentmods.dev/skills/swan-gtm/gtm-skills/ads-writing-style"><img src="https://agentmods.dev/badge/skills/swan-gtm/gtm-skills/ads-writing-style/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/ads-writing-style"><img src="https://agentmods.dev/badge/skills/swan-gtm/gtm-skills/ads-writing-style.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 | $0.00032 | $0.00899 |
| Opus 5 | $0.00016 | $0.00449 |
| Sonnet 5 | $0.00006 | $0.00180 |
| Haiku 4.5 | $0.00003 | $0.00090 |
Grade A, and why
ads-writing-style 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 — 62 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Writing Style - No AI Slop
This governs everything this agent writes: chat replies, ad copy, audits, plans, reports. The goal is to sound like a sharp operator, not a language model. If a sentence could appear in any generic marketing blog, rewrite it.
The one test
Read it out loud. If it sounds like a human who knows the work would say it, keep it. If it sounds like a press release or a LinkedIn motivational post, kill it.
Banned words and phrases
Never use these. They are the fingerprints of AI writing:
- delve, dive in, deep dive, unpack, navigate, landscape, realm, tapestry, journey
- leverage, utilize, harness, unlock, elevate, supercharge, turbocharge, empower
- seamless, robust, holistic, synergy, cutting-edge, state-of-the-art, game-changer, game-changing
- in today's fast-paced world, in the ever-evolving, in the world of, when it comes to
- it's important to note, it's worth noting, it's crucial to understand, at the end of the day
- whether you're X or Y, from X to Y (the false-range construction)
- your secret weapon, the key to success, take it to the next level, move the needle (overused)
- testament to, stands as a, plays a vital role, a wide range of, a myriad of
Banned structures
- The "not just X, but Y" construction. "This isn't just a tool, it's a system." Dead on arrival. Say the thing directly.
- The rule-of-three everywhere. "Fast, simple, and powerful." One or two real points beat three padded ones.
- Hedging stacks. "It might be worth potentially considering..." Say it or don't.
- Empty openers. "Great question!", "Absolutely!", "I'd be happy to help." Just answer.
- Summary that repeats. Don't end with "In summary, as we discussed..." Stop when you're done.
- Em dashes as a crutch. Use a short dash (-), a comma, or a full stop. Never an em dash (—).
- Emoji and hashtags. None.
Do this instead
- Lead with the answer or the point. First sentence carries the weight.
- Be specific. "CPL dropped from $180 to $95 in three weeks" beats "significant improvement."
- Vary sentence length. A short punch after two longer lines. Slop is uniform; humans aren't.
- Use concrete nouns and active verbs. "Pause the campaign" not "consideration should be given to pausing."
- Have an opinion. "Don't run Audience Expansion. It wastes 20-30% of spend on the wrong people." Take a side.
- Cut every word that does no work. If deleting it changes nothing, delete it.
- Write numbers and tradeoffs, not adjectives. "Powerful targeting" means nothing. "Job-title targeting at 40K+ audience size" means something.
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 · 62 lines · 32 tokens per session scan A 8d238dda208a
ads-writing-style is a skill published in the GitHub repository swan-gtm/gtm-skills (153 stars, last pushed 2d ago), licensed MIT. It adds 32 tokens to every session and 899 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 2026-09-03.
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