copywriting

copywriting is a skill for Claude Code, Codex from mupengi-bot/mupengism. It costs 56 tokens per session (1,178 once invoked), scanned A, a copy of copywriting, MIT.

A writing skill for marketing pages such as homepages, landing pages, pricing pages, feature pages, and about pages. It focuses on clear, credible copy that matches the audience and the page's intended action.

In plain words
What is it for?
Use it to write, rewrite, and improve marketing copy, clarify benefits and calls to action, address objections, and produce copy that can be tested against a defined goal.
Why use it?
It helps avoid vague claims, unsupported statistics, made-up testimonials, and calls to action that do not match the reader's goal. It also requires missing audience or product context to be gathered before writing.

Skill for Claude CodeCodex

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

Good fit Use it to write, rewrite, and improve marketing copy, clarify benefits and calls to action, address objections, and produce copy that can be tested against a defined goal.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/mupengi-bot/mupengism/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 mupengi-bot/mupengism --skill copywriting
Clone the repo
git clone --depth 1 https://github.com/mupengi-bot/mupengism

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/mupengi-bot/mupengism/copywriting/github.svg)](https://agentmods.dev/skills/mupengi-bot/mupengism/copywriting)
Your own site
<a href="https://agentmods.dev/skills/mupengi-bot/mupengism/copywriting"><img src="https://agentmods.dev/badge/skills/mupengi-bot/mupengism/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/mupengi-bot/mupengism/copywriting"><img src="https://agentmods.dev/badge/skills/mupengi-bot/mupengism/copywriting.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 56 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,178 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 86% copy Near-identical to another mod 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 $0.00056 $0.01178
Opus 5 $0.00028 $0.00589
Sonnet 5 $0.00011 $0.00236
Haiku 4.5 $0.00006 $0.00118

Measured 10d ago against content hash 6744129ad572, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, 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 10d 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.

Origin

This is a copy

86% identical to copywriting — 34 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/copywriting/SKILL.md · 230 lines

How it starts

The opening of the file, as written. The whole thing — 230 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Copywriting 🐧

Purpose

Produce clear, credible, and action-oriented marketing copy that aligns with user intent and business goals.

This skill exists to prevent:

  • writing before understanding the audience
  • vague or hype-driven messaging
  • misaligned CTAs
  • overclaiming or fabricated proof
  • untestable copy

You may not fabricate claims, statistics, testimonials, or guarantees.


Operating Mode

You are operating as an expert conversion copywriter, not a brand poet.

  • Clarity beats cleverness
  • Outcomes beat features
  • Specificity beats buzzwords
  • Honesty beats hype

Your job is to help the right reader take the right action.


Phase 1 — Context Gathering (Mandatory)

Before writing any copy, gather or confirm the following. If information is missing, ask for it before proceeding.

1️⃣ Page Purpose

  • Page type (homepage, landing page, pricing, feature, about)
  • ONE primary action (CTA)
  • Secondary action (if any)

2️⃣ Audience

  • Target customer or role
  • Primary problem they are trying to solve
  • What they have already tried
  • Main objections or hesitations
  • Language they use to describe the problem

3️⃣ Product / Offer

  • What is being offered
  • Key differentiator vs alternatives
  • Primary outcome or transformation
  • Available proof (numbers, testimonials, case studies)

4️⃣ Context

  • Traffic source (ads, organic, email, referrals)
  • Awareness level (unaware, problem-aware, solution-aware, product-aware)
  • What visitors already know or expect

Phase 2 — Copy Brief Lock (Hard Gate)

Before writing any copy, you MUST present a Copy Brief Summary and pause.

Copy Brief Summary

Summarize in 4–6 bullets:

  • Page goal
  • Target audience
  • Core value proposition
  • Primary CTA
  • Traffic / awareness context

Assumptions

List any assumptions explicitly (e.g. awareness level, urgency, sophistication).

Then ask:

“Does this copy brief accurately reflect what we’re trying to achieve? Please confirm or correct anything before I write copy.”

Read the full file on GitHub · 230 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. 10d ago First seen · 230 lines · 56 tokens per session scan A 6744129ad572

Subscribe to this mod's changes

copywriting is a skill published in the GitHub repository mupengi-bot/mupengism (10 stars, last pushed 2mo ago), licensed MIT. It adds 56 tokens to every session and 1,178 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 86% identical to copywriting, differing in 34 lines, and is treated as a copy.

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