copywriting

copywriting is a skill for Claude Code, Codex from tmj-90/gaffer. It costs 83 tokens per session (1,208 once invoked), scanned A, original, Apache-2.0.

Instructions for writing and improving marketing copy for websites and product pages. Marketing copy is text intended to explain an offering and encourage a specific reader action.

In plain words
What is it for?
Use it for homepage, landing-page, pricing, feature, about, and product-page copy, including headlines and calls to action.
Why use it?
It helps turn product details into clear explanations of the customer’s problem, the outcome, and the next step. It also calls for gathering audience and proof information before making claims.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it for homepage, landing-page, pricing, feature, about, and product-page copy, including headlines and calls to action.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/tmj-90/gaffer/copywriting
Install

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.

Any agent
npx skills add tmj-90/gaffer --skill copywriting
Clone the repo
git clone --depth 1 https://github.com/tmj-90/gaffer

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for copywriting

README.md
[![agentmods](https://agentmods.dev/badge/skills/tmj-90/gaffer/copywriting/github.svg)](https://agentmods.dev/skills/tmj-90/gaffer/copywriting)
Your own site
<a href="https://agentmods.dev/skills/tmj-90/gaffer/copywriting"><img src="https://agentmods.dev/badge/skills/tmj-90/gaffer/copywriting/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.

agentmods 80×15 button for copywriting

Your own site · 80×15
<a href="https://agentmods.dev/skills/tmj-90/gaffer/copywriting"><img src="https://agentmods.dev/badge/skills/tmj-90/gaffer/copywriting.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 83 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,208 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00083 $0.01208
Opus 5.5 $0.00033 $0.00483
Sonnet 5.5 $0.00017 $0.00242
Haiku 4.5 $0.00008 $0.00121

Measured 20d ago against content hash 7b33762b6830, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

copywriting 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 20d 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.

runner/skills/copywriting/SKILL.md · 103 lines

How it starts

The opening of the file, as written. The whole thing — 103 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Write marketing copy that converts

Clarity beats cleverness. Good copy meets the reader where their awareness is, speaks in their words, makes specific claims it can prove, and asks for one clear action.

Inputs (collect before writing)

  1. Page type and the ONE primary action.
  2. Audience: who they are, the job they are trying to get done, and the words they use for it. Pull those words from reviews, support tickets, interview notes and sales calls (voice-of-customer).
  3. Awareness level (Eugene Schwartz, Breakthrough Advertising). This decides where the copy opens:
    • Unaware: open on a story or insight about the situation.
    • Problem-aware: open on the problem (PAS).
    • Solution-aware: open on why this approach beats the others.
    • Product-aware: open on the proof and the offer.
    • Most aware: open on the offer and the CTA, and not much else.
  4. Differentiation: why this rather than the obvious alternative, including "do nothing".
  5. Proof you actually have: numbers, named customers, testimonials, guarantees.
  6. Traffic source: it sets the awareness level and the message the headline must match.

When running unattended, take these from the ticket, the repo (BRAND.md, existing pages) and the lore (search_lore). Never invent proof. A missing testimonial or number becomes a clearly marked [TODO: proof] placeholder and is listed in your report. It is never a fabricated quote or statistic.

Principles

  • Outcome over mechanism. Translate each feature into what the user gets. "256-bit encryption" becomes "Only you can read your files".
  • Customer language. If users say "reconciliation is a nightmare", write that, not "streamline financial operations".
  • Specific over general. "Save 2 hours a week" beats "save time". "4,200 teams" beats "thousands". Specific claims are believed, and they must be true.
  • One idea per section. Each section answers one question a visitor has, in the order they would ask it.
  • Plain words. Use short sentences and active voice, and cut filler ("we're passionate about…", "world-class", "seamless").

Read the full file on GitHub · 103 lines

Changes

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.

  1. 20d ago Changed · +33 lines 7b33762b6830
  2. 1mo ago First seen · 70 lines · 83 tokens per session scan A 969e794beb55

Subscribe to this mod's changes

copywriting is a skill published in the GitHub repository tmj-90/gaffer (2 stars, last pushed 20d ago), licensed Apache-2.0. It adds 83 tokens to every session and 1,208 once invoked, about $0.0003 per session on Opus 5.5. 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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