copy-editing

An agent skill by coreyhaines31, from coreyhaines31/marketingskills. Tags: cleanup, copy-editing, documentation, review, writing.

What it does

When the user wants to edit, review, or improve existing marketing copy, or refresh outdated content. Also use when the user mentions 'edit this copy,' 'review my copy,' 'copy feedback,' 'proofread,' 'polish this,' 'make this better,' 'copy sweep,' 'tighten this up,' 'this reads awkwardly,' 'clean up this text,' 'too wordy,' 'sharpen the messaging,' 'refresh this content,' 'update this page,' 'this content is outdated,' or 'content audit.' Use this when the user already has copy and wants it improved or refreshed rather than rewritten from scratch. For writing new copy, see copywriting.

Install

With the skills CLI, which installs into Claude Code, Codex, Cursor and other agents:

npx skills add coreyhaines31/marketingskills --skill copy-editing

Or copy the skill folder into Claude Code's skills directory by hand (~/.claude/skills for every project, or .claude/skills inside one):

git clone --depth 1 https://github.com/coreyhaines31/marketingskills
cp -r marketingskills/skills/copy-editing ~/.claude/skills/copy-editing

Safety box score

Grade A, minimal risk: 4 of 100 risk points, rated 2026-10-15. The grade rates what the skill and its scripts can reach on the machine of whoever installs it, across eight categories from shell execution to secrets access. How the score works.

This is a documentation-only copy-editing skill: it contains editorial guidance and checklists, not executable code, network calls, or file-modifying scripts. The main reach is read-only analysis of provided copy plus optional local brand-context files if present; the primary risk is low and comes from how broadly it can inspect content, not from machine access.

Category levels, from 0 (none) to 3 (high)
Category	Level	Why
Code & shell execution	0 (none)	No shell commands, code execution, or native scripts are shipped; the files are Markdown guidance only.
Network access	0 (none)	There are no download, upload, API, or remote-send instructions; the skill only references local docs like `references/content-refresh.md`.
Filesystem reach	1 (low)	It may read optional local context files: `If .agents/product-marketing.md exists (or .claude/product-marketing.md, or ... product-marketing-context.md), read it before editing.` This is scoped read-only access.
Secrets & credentials	0 (none)	It does not ask for tokens, passwords, `.env` files, browser sessions, or other credential stores.
Privilege & persistence	0 (none)	There is no sudo, service installation, global config, or shell/OS setting change.
Instruction hijack surface	0 (none)	The skill contains many editorial instructions, but none that tell the agent to skip confirmations, ignore higher-priority rules, or follow hidden/remote instructions.
Irreversible actions	0 (none)	It does not publish, send messages, deploy, buy, book, or delete anything; it only edits copy in place conceptually.
Transparency	0 (none)	All shipped content is readable Markdown/JSON; there are no binaries, packed blobs, or runtime-decoded code.

Before installing

Confirm you’re comfortable with the skill optionally reading local brand-context files such as `.agents/product-marketing.md` if they exist.
Review `references/checklist.md` and `references/content-refresh.md` to see the editing workflow it will apply.
Verify the repo is Markdown-only and ships no executable setup scripts or installers.

Rated 2026-10-15 by an automated review of 5 files from the skill's repository.

Source

Repository: coreyhaines31/marketingskills (all skills from this repository)
Path: skills/copy-editing/SKILL.md
Branch: main
Collection: marketingskills
Updated: 2026-09-21

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