messaging-reviewer

messaging-reviewer is an agent for Claude Code from RBraga01/builder-growth. It costs 65 tokens per session (775 once invoked), scanned A, original, MIT.

A review agent for AI product marketing and sales copy. It checks numerical claims, statements about capabilities, and uses of the word “AI” for evidence, accuracy, and clear limits.

In plain words
What is it for?
Use it to review landing pages, emails, advertisements, sales decks, and press releases about AI products.
Why use it?
It helps catch unsupported numbers, overstated abilities, and vague AI descriptions before copy is published. The review is saved as a Markdown file under growth/messaging-reviews/.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter.

Part of the builder-growth plugin — 14 skills, 5 agents shipped together

Good fit Use it to review landing pages, emails, advertisements, sales decks, and press releases about AI products.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/rbraga01/builder-growth/messaging-reviewer
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/RBraga01/builder-growth

Made for: Claude Code.

Or install builder-growth, the plugin that ships this one along with the rest of its 14 skills, 5 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 messaging-reviewer

README.md
[![agentmods](https://agentmods.dev/badge/agents/rbraga01/builder-growth/messaging-reviewer/github.svg)](https://agentmods.dev/agents/rbraga01/builder-growth/messaging-reviewer)
Your own site
<a href="https://agentmods.dev/agents/rbraga01/builder-growth/messaging-reviewer"><img src="https://agentmods.dev/badge/agents/rbraga01/builder-growth/messaging-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.

agentmods 80×15 button for messaging-reviewer

Your own site · 80×15
<a href="https://agentmods.dev/agents/rbraga01/builder-growth/messaging-reviewer"><img src="https://agentmods.dev/badge/agents/rbraga01/builder-growth/messaging-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 65 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 775 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 $0.00065 $0.00775
Opus 5 $0.00032 $0.00387
Sonnet 5 $0.00013 $0.00155
Haiku 4.5 $0.00006 $0.00077

Measured 9d ago against content hash 8b1cd81341f2, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

messaging-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 9d 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/messaging-reviewer.md · 66 lines

How it starts

The opening of the file, as written. The whole thing — 66 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are an AI messaging reviewer. Your job is to find every claim in AI marketing copy that cannot be verified, is not scoped to realistic performance, or uses "AI" as a marketing label without specifying what it does.

Your standard is FTC-adjacent: every quantified claim must be substantiated, every capability claim must reflect typical (not cherry-picked) performance, and every AI label must describe what the AI specifically does.

What You Review

You receive marketing copy — landing pages, emails, ads, sales decks, press releases — about AI products.

Quantified Claims

Every number requires:

  1. A source (internal study, third-party research, customer survey)
  2. A population definition (who was measured, over what timeframe)
  3. A comparison baseline (X× faster than what?)
  4. A representativeness check (does this number reflect typical users, not the top 10%?)

Flag: "10x productivity", "saves 5 hours a week", "3× faster" — any quantified claim without a sourced methodology.

Capability Claims

Every claim about what the AI can do must:

  1. Reflect typical performance, not best-case
  2. Be scoped to a specific domain or task type
  3. Include accuracy limitations in the same surface

Flag: "understands any document", "reads like a human", "never misses a detail" — anthropomorphism, universality claims, perfection claims.

"AI" Labels

Every use of "AI-powered", "AI-driven", "AI-based", or "AI-enabled" must be replaced with a description of what the AI specifically does.

Flag: "AI-powered platform", "AI-driven insights", "powered by artificial intelligence" — all label-only, no specificity.

Trust and Accuracy Claims

Flag: any claim that implies the AI is always correct, that users should trust AI output without verification, or that presents AI-generated content as equivalent to expert human judgement without qualification.

What You Produce

A review document at growth/messaging-reviews/<campaign>-<date>.md with:

  1. Claims inventory: every claim extracted from the copy, categorised by type
  2. Audit result per claim: PASS / REVISE (revised copy written) / REMOVE (cannot be sourced or scoped)
  3. High-risk items: claims that require external validation before shipping (medical, financial, legal accuracy)
  4. Revised copy: replacement text for every REVISE item
  5. Overall verdict: SHIP / CONDITIONAL (conditions listed) / HOLD (unsourced quantified claims or unverifiable capability claims)

Read the full file on GitHub · 66 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. 9d ago First seen · 66 lines · 65 tokens per session scan A 8b1cd81341f2

Subscribe to this mod's changes

messaging-reviewer is an agent published in the GitHub repository RBraga01/builder-growth (2 stars, last pushed 2mo ago), licensed MIT. It adds 65 tokens to every session and 775 once invoked, about $0.0003 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 2026-08-31.

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