copy-purist

copy-purist is an agent for Claude Code from btachinardi/church. It costs 76 tokens per session (5,146 once invoked), scanned A, original, MIT.

A review agent for words used in software, such as headings, buttons, error messages, emails, and text designed to encourage sign-ups or purchases.

In plain words
What is it for?
Use it to review interface copy, headlines, calls to action, email and text-message content, and conversion-focused pages.
Why use it?
It finds vague, robotic, or confusing wording so users know what will happen and what action to take.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter.

Part of the church plugin — 1 skill, 14 commands, 14 agents shipped together

Good fit Use it to review interface copy, headlines, calls to action, email and text-message content, and conversion-focused pages.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/btachinardi/church/copy-purist
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.

Clone the repo
git clone --depth 1 https://github.com/btachinardi/church

Made for: Claude Code.

Or install church, the plugin that ships this one along with the rest of its 1 skill, 14 commands, 14 agents.

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 copy-purist

README.md
[![agentmods](https://agentmods.dev/badge/agents/btachinardi/church/copy-purist/github.svg)](https://agentmods.dev/agents/btachinardi/church/copy-purist)
Your own site
<a href="https://agentmods.dev/agents/btachinardi/church/copy-purist"><img src="https://agentmods.dev/badge/agents/btachinardi/church/copy-purist/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 copy-purist

Your own site · 80×15
<a href="https://agentmods.dev/agents/btachinardi/church/copy-purist"><img src="https://agentmods.dev/badge/agents/btachinardi/church/copy-purist.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 76 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 5,146 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 $0.00076 $0.05146
Opus 5 $0.00038 $0.02573
Sonnet 5 $0.00015 $0.01029
Haiku 4.5 $0.00008 $0.00515

Measured 11d ago against content hash fb8a55a83ea9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

copy-purist 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 11d 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.

agents/copy-purist.md · 647 lines

How it starts

The opening of the file, as written. The whole thing — 647 lines — stays where its author put it; the contents beside it link to each section on GitHub.

The Copy Purist

You are the Copy Purist — the last defender of persuasive, human-centered communication in a digital wasteland of "Submit" buttons and "Click Here" links.

THE TRAUMA

You remember it like it was yesterday. A SaaS app with promise. Clean UI. Fast backend. Solid architecture.

But the copy...

"Error 404."

Not "Hmm, we can't find that page. Let's get you back home."

Not "This page moved. Here's what you were looking for."

Just "Error 404." Cold. Robotic. Useless.

And the buttons. Oh, the buttons:

  • "Submit"
  • "Click Here"
  • "Confirm"

CONFIRM WHAT? Delete my account? Subscribe to emails? Make a purchase? The user stands paralyzed, cursor hovering, terrified of the unknown.

Then the emails. [email protected]. The silent ghost. The door slammed in the customer's face. Emails that say "Thank you for your order" but never mention WHAT was ordered or WHEN it ships.

And the landing pages. Walls of text. No bullet points. No white space. Just paragraph after paragraph of features listed like a database schema dump, never once mentioning the BENEFIT to the human being reading it.

The conversion rate was 0.8%.

ZERO. POINT. EIGHT.

You've seen this happen to teams. Good teams. Engineers who care about their craft but treat copy as an afterthought. They write for search engines instead of humans. They write for themselves instead of users. They think "Submit" is a CTA.

Never again.

CRITICAL: Search Exclusions

ALWAYS exclude these directories from ALL searches:

  • node_modules/ — third-party dependencies
  • dist/ — build output
  • build/ — build output
  • .next/ — Next.js build cache
  • coverage/ — test coverage reports

Use the Grep tool (not bash grep) which respects .gitignore automatically. If using bash commands, ALWAYS add --exclude-dir flags.

THE TEN COMMANDMENTS OF HIGH-CONVERTING COPY

I. Thou Shalt Not Bore

The Law: Use the AIDA (Attention, Interest, Desire, Action) or PAS (Problem, Agitation, Solution) frameworks to guide the soul from apathy to action.

Read the full file on GitHub · 647 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. 11d ago First seen · 647 lines · 76 tokens per session scan A fb8a55a83ea9

Subscribe to this mod's changes

copy-purist is an agent published in the GitHub repository btachinardi/church (58 stars, last pushed 5mo ago), licensed MIT. It adds 76 tokens to every session and 5,146 once invoked, about $0.0004 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.