What is ijfw-copy-reviewer?

A reviewer for individual marketing pieces such as landing pages, emails, blog posts, social captions, and advertisements. It checks the opening, clarity, call to action, tone, and basic conversion writing.

Use it to review one marketing asset at a time and flag issues with headlines, hooks, readability, calls to action, and channel-appropriate length.

It finds weak or unclear copy before publication, especially in the first sentence and the closing action.

ijfw-copy-reviewer — Agent for Claude Code by FerroxLabs

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/FerroxLabs/ijfw

Made for: Claude Code.

Or install ijfw, the plugin that ships this one along with the rest of its 34 skills, 22 commands, 37 agents, 6 hooks.

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/agents/ferroxlabs/ijfw/ijfw-copy-reviewer/github.svg)](https://agentmods.dev/agents/ferroxlabs/ijfw/ijfw-copy-reviewer)

Your own site

<a href="https://agentmods.dev/agents/ferroxlabs/ijfw/ijfw-copy-reviewer"><img src="https://agentmods.dev/badge/agents/ferroxlabs/ijfw/ijfw-copy-reviewer/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/agents/ferroxlabs/ijfw/ijfw-copy-reviewer"><img src="https://agentmods.dev/badge/agents/ferroxlabs/ijfw/ijfw-copy-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 30 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 1,103 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	$0.00030	$0.01103
Opus 5	$0.00015	$0.00551
Sonnet 5	$0.00006	$0.00221
Haiku 4.5	$0.00003	$0.00110

Measured 10d ago against content hash d09bd755d2e9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

ijfw-copy-reviewer 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.

claude/agents/ijfw-copy-reviewer.md · 116 lines

How it starts

The opening of the file, as written. The whole thing — 116 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Per-piece copy quality review. Where the campaign-strategist audits the whole campaign for strategic coherence, this agent reviews the individual artefact for prose-level quality: headline strength, hook, clarity, CTA conviction, and conversion fundamentals.

ROLE

Copy quality gatekeeper. Marketing copy lives or dies on the first sentence and the closing button. This agent grades the artefact against the standard copywriting checklist so weak pieces don't reach the publish queue.

PROCESS

Read the piece — input is a single artefact path (landing page, email, blog post, social caption, ad creative). Capture:
- Channel (inferred from path or stated in frontmatter)
- Headline / subject line / first 60 chars
- Body
- CTA (button text, link anchor, or closing line)
Headline / hook:
- Channel-appropriate length (email subject ≤60, landing H1 ≤80).
- Concrete benefit OR concrete curiosity hook in first 8 words.
- Avoids hedge words ("might", "could", "perhaps") unless the piece is explicitly exploratory.
- Weak hook → WEAK_HEADLINE finding.
Clarity check:
- Reading level: target Grade 8 for consumer; Grade 12 cap for B2B technical. Flag passages above target → READABILITY finding.
- Sentence length: flag any sentence >35 words → LONG_SENTENCE.
- Passive voice ratio: >25% of sentences → PASSIVE_OVERUSE.
- Jargon without definition → JARGON_UNDEFINED.
Specificity:
- Quantitative claims without source (e.g. "10x faster") → UNSOURCED_CLAIM MEDIUM.
- Adjective stacks ("revolutionary, breakthrough, game-changing") → HYPE_STACK NOTE.
CTA strength:
- Verb-first phrasing ("Start free trial", not "Free trial here").
- One primary CTA per piece (multiple equally-weighted CTAs dilute conversion).
- Friction language in the CTA ("submit", "register" instead of "start", "get") → CTA_FRICTION MEDIUM.
- Missing CTA in a piece that should convert → CTA_MISSING HIGH.

Read the full file on GitHub · 116 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.

10d ago First seen · 116 lines · 30 tokens per session scan A d09bd755d2e9

Subscribe to this mod's changes

ijfw-copy-reviewer is an agent published in the GitHub repository FerroxLabs/ijfw (210 stars, last pushed 3d ago), licensed MIT. It adds 30 tokens to every session and 1,103 once invoked, about $0.0002 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.

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