AI Copywriter is a portable agent skill for writing marketing copy and revising it to avoid recognizable patterns of machine-generated prose. It produces items such as headlines, product descriptions, microcopy, subject lines, and button labels for people who need human-sounding marketing text. Its catalogue plugin, instruction, and skill package this writing workflow for coding agents.
Borrowing it
Nothing to install: this file belongs to mikiarlo3/ai-copywriter. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/mikiarlo3/ai-copywriter/claude/humanizer-copywriting-skill-u5x4vd/AGENTS.mdgit clone --depth 1 https://github.com/mikiarlo3/ai-copywriterWrote 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/instructions/mikiarlo3/ai-copywriter/agents-md)<a href="https://agentmods.dev/instructions/mikiarlo3/ai-copywriter/agents-md"><img src="https://agentmods.dev/badge/instructions/mikiarlo3/ai-copywriter/agents-md.svg" alt="Measured on agentmods" 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 | $0.00703 | $0.00703 |
| Opus 5 | $0.00351 | $0.00351 |
| Sonnet 5 | $0.00141 | $0.00141 |
| Haiku 4.5 | $0.00070 | $0.00070 |
Grade A, and why
ai-copywriter AGENTS.md 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.
How it starts
The opening of the file, as written. The whole thing — 34 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
Guidance for AI coding agents (Claude Code, Codex, Warp, etc.) working in this repository.
What this repo is
A portable agent skill implemented entirely as Markdown. The runtime artifact is SKILL.md: the agent reads its YAML frontmatter and prompt. There is no build step, and the repo should avoid wording that limits support to one or two harnesses.
The skill has two halves: COPYWRITING MODE (clickbait titles, short descriptions, microcopy, subject lines) and the humanizer engine (33 numbered AI-writing patterns forked unchanged from blader/humanizer v2.9.1). The copywriting sections depend on the patterns; don't edit one side without checking the other still makes sense.
Key files
SKILL.md— the skill itself. Portable YAML frontmatter (name,description,license,metadata.version) followed by the copywriting mode and the canonical, numbered pattern list with before/after examples. This is the source of truth.README.md— for humans: installation, usage, the copywriting mode summary, a summary table of the patterns, and a version history..claude-plugin/plugin.json— optional Claude Code plugin manifest..claude-plugin/marketplace.json— optional single-repo marketplace entry so/plugin marketplace add mikiarlo3/ai-copywriterworks.scripts/validate-package.py— dependency-free package and synchronization checks used locally and in CI.
The maintenance contract
SKILL.md and README.md must stay in sync. When you change behavior or content:
- Patterns: the skill currently defines 33 numbered patterns. If you add, remove, or renumber any, update the README pattern table, the validator's expected range, and every cross-reference in the same change. Keep numbering stable unless you are deliberately renumbering.
- Version:
SKILL.mdfrontmatter stores the version undermetadata.version,README.mdhas a "Version history" section, and.claude-plugin/plugin.jsonhas aversionfield. Bump them together so package metadata matches the skill. Keep the skill version undermetadata; a top-levelversionkey is not portable across Agent Skills hosts. (marketplace.jsonintentionally omits a version soplugin.jsonstays the package source of truth.) - Compatibility: keep install and usage language harness-neutral. The skill should work in any agent harness that can load Markdown skill instructions; Claude Code, OpenCode, Codex, and other harnesses are examples, not limits.
- Validation: run
python3 scripts/validate-package.py,npx skills add . --list, andclaude plugin validate .before publishing. - Non-obvious fixes: if you change the prompt to handle a tricky failure mode (a repeated mis-edit, an unexpected tone shift), add a short note to the README version history explaining what was fixed and why.
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 · 34 lines · 703 tokens per session scan A 6dc955cc26bf
ai-copywriter AGENTS.md is an instructions file published in the GitHub repository mikiarlo3/ai-copywriter (1,042 stars, last pushed 1mo ago), licensed MIT. It adds 703 tokens to every session, about $0.0035 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 2026-08-30.
Other instructions, from other repositories
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
spec-kit AGENTS.md
AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.