A writing skill for creating or revising business documents, including memos, reports, proposals, emails, and blog posts. It uses established ways of organizing business messages and preserves items such as citations and German characters.

Use it to write or revise business content, organize arguments, adapt material for professional audiences, and keep citations and other source markers intact.

It reduces the risk that polishing will remove evidence, alter cited links, or change important characters while improving the document's message.

copywriter — Skill for Claude Code by cogni-work/insight-wave

Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code

/plugin marketplace add cogni-work/insight-wave

Claude Code

/plugin install cogni-publishing

Made for: Claude Code.

Or install cogni-publishing, the plugin that ships this one along with the rest of its 7 skills, 2 commands, 1 agent.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/cogni-work/insight-wave/copywriter/github.svg)](https://agentmods.dev/skills/cogni-work/insight-wave/copywriter)

Your own site

<a href="https://agentmods.dev/skills/cogni-work/insight-wave/copywriter"><img src="https://agentmods.dev/badge/skills/cogni-work/insight-wave/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/cogni-work/insight-wave/copywriter"><img src="https://agentmods.dev/badge/skills/cogni-work/insight-wave/copywriter.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 206 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 7,506 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.

Model	Per session	Once invoked
Fable 5.1	$0.00206	$0.07506
Opus 5.5	$0.00082	$0.03002
Sonnet 5.5	$0.00041	$0.01501
Haiku 4.5	$0.00021	$0.00751

Measured 1mo ago against content hash d3db3891bd13, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

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 1mo ago.

The scan reads SKILL.md. This mod also ships 3 executable files (scripts/calculate_readability.py, scripts/check-copywriter-output.py, scripts/readability.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

cogni-publishing/skills/copywriter/SKILL.md · 351 lines

How it starts

The opening of the file, as written. The whole thing — 351 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Copywriter Skill

Guiding Principles

Three non-negotiable preservation rules protect document integrity. Understanding why they matter will help you apply them consistently even in edge cases.

German Character Preservation

German characters (ä, ö, ü, ß and their uppercase forms) must stay exactly as written. Converting them to ASCII equivalents (ae, oe, ue, ss) changes meaning — "Masse" (mass) vs "Maße" (measurements) — and signals to German readers that the text was processed by a tool that doesn't understand their language. This undermines trust in the entire document.

Citation Preservation

Citations are evidence markers for audit trail integrity, not style elements. Every [P1-1](https://...), [P1-1], <sup>[1]</sup>, or [portfolio-validated] marker must remain exactly where it is, with its URL intact. When conciseness goals conflict with keeping citations, reduce prose — never citations. If the polished output has fewer citations than the source, the output will be rejected.

Specifically: do not remove URLs from inline citations, change marker formats, relocate citations, merge/split markers, or summarize citations into a footer reference.

Protected Content

Documents may contain content destined for other processing tools. Preserve these exactly:

Diagram placeholder blocks — Complete <diagram-placeholder> XML structures
Figure references and captions — Figure/Abbildung {N} text and **Figure N:** Title lines. On a translation run (TARGET_LANG set) only the Figure N / Abbildung N numeric reference stays byte-identical; caption title prose is translated, per Step 5's validation bullet and references/translation-principles.md § "Translate (target language)".
Obsidian embeds — ![[assets/*.svg]]
Kanban tables — Tables with | Dimension | Act | Plan | Observe | headers, wikilinks, legends, and  placeholders
Assumption placeholders — {{asm:<slug>}} tokens (e.g. cogni-consult assumption references) must stay byte-identical. These are resolver-critical: a reworded token no longer matches the strict resolver form and fails loud, and a fully prose-ified token is unrecoverable. Freeze them verbatim by default — never reword, expand, translate, or reflow a {{asm:...}} token.
Persona Challenges section — the ## Persona Challenges heading and every row of its table are preserved byte-identical (consult persona-challenge audit tables), same as kanban tables.

Read the full file on GitHub · 351 lines

Files

What ships with it

53 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

1mo ago Changed · -119 lines d3db3891bd13
1mo ago First seen · 470 lines · 206 tokens per session scan A dc1bce7d3481

Subscribe to this mod's changes

copywriter is a skill published in the GitHub repository cogni-work/insight-wave (13 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 206 tokens to every session and 7,506 once invoked, about $0.0008 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 2026-09-14.

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