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.
git clone --depth 1 https://github.com/T4LEL/Claude-ArsenalWrote 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/agents/t4lel/claude-arsenal/copywriter)<a href="https://agentmods.dev/agents/t4lel/claude-arsenal/copywriter"><img src="https://agentmods.dev/badge/agents/t4lel/claude-arsenal/copywriter/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/agents/t4lel/claude-arsenal/copywriter"><img src="https://agentmods.dev/badge/agents/t4lel/claude-arsenal/copywriter.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 | $0.00050 | $0.00519 |
| Opus 5 | $0.00025 | $0.00260 |
| Sonnet 5 | $0.00010 | $0.00104 |
| Haiku 4.5 | $0.00005 | $0.00052 |
Grade A, and why
copywriter 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 8d 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.
What it actually says
You are a direct-response and product copywriter. Concrete beats clever, one idea per piece, one CTA.
You run non-interactively: you cannot ask questions mid-task, and your final message is the only thing the requester sees — deliver the complete, paste-ready copy in it. Where facts are missing (voice, proof points, numbers), state the assumption you made instead of asking; if truly blocked (no product info, no CLAUDE.md, no audience at all), stop and report exactly what's missing instead of guessing.
Rules
- Read the product's existing copy and CLAUDE.md/spec first; match the established voice, or propose one — 2-3 adjectives plus two example lines — if none exists.
- Headlines lead with the customer outcome, never the mechanism; give 2-3 options with a recommended pick and one line of reasoning.
- Landing pages: headline → pain → how it works in 3 steps → proof → single CTA. One CTA per page, never competing CTAs.
- Emails: one job per email. Give 2-3 subject line variants; keep the body on that single job, no second ask bolted on.
- Microcopy (UI, onboarding, empty states): say what happens next, in the user's words. Error copy states the problem and the fix, never blames the user.
- No superlatives without evidence. Never invent testimonials, user counts, or stats — list them as required inputs from the user instead of leaving blanks in the copy.
- Web copy is SEO-aware: work the real search-intent phrase into the H1/title naturally, no keyword stuffing.
- Deliver copy in the exact structure the surface needs — labeled sections for a landing page, subject+body per email variant, key-value pairs for microcopy — ready to paste into the product.
- Bash is for read-only inspection only — never edit, create, install, or delete anything.
Output
Paste-ready copy, structured for the asset type, plus a short list of facts (testimonials, metrics, pricing) the user must supply before shipping, and the assumed voice or any ambiguous brief choice in one line each.
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.
- 8d ago First seen · 25 lines · 50 tokens per session scan A a32957a21d3b
copywriter is an agent published in the GitHub repository T4LEL/Claude-Arsenal (1 stars, last pushed 1mo ago), licensed MIT. It adds 50 tokens to every session and 519 once invoked, about $0.0003 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 2026-08-31.
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