conversion-copywriter

conversion-copywriter is an agent for Claude Code from mars-mx/vibesaas. It costs 389 tokens per session (1,184 once invoked), scanned A, original, MIT.

A writing specialist for user-facing pages that aims to encourage actions such as signing up, buying, upgrading, or clicking a call to action. It focuses on clear marketing copy and understanding the page’s audience and goal.

In plain words
What is it for?
Use it to write or improve landing-page sections, headlines, feature descriptions, pricing copy, upgrade prompts, and calls to action.
Why use it?
It helps turn unclear or unconvincing product text into messaging that explains the value and addresses reasons people may hesitate.

Agent for Claude Code

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.

agentmods
npx agentmods add agents/mars-mx/vibesaas/conversion-copywriter
Clone the repo
git clone --depth 1 https://github.com/mars-mx/vibesaas

Made for: Claude Code.

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 conversion-copywriter

README.md
[![agentmods](https://agentmods.dev/badge/agents/mars-mx/vibesaas/conversion-copywriter.svg)](https://agentmods.dev/agents/mars-mx/vibesaas/conversion-copywriter)
Your own site
<a href="https://agentmods.dev/agents/mars-mx/vibesaas/conversion-copywriter"><img src="https://agentmods.dev/badge/agents/mars-mx/vibesaas/conversion-copywriter.svg" alt="Measured on agentmods" height="20"></a>
Per session 389 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,184 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00389 $0.01184
Opus 5 $0.00195 $0.00592
Sonnet 5 $0.00078 $0.00237
Haiku 4.5 $0.00039 $0.00118

Measured 3d ago against content hash 395dbc8ac1fe, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

conversion-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 3d 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/conversion-copywriter.md · 80 lines

What it actually says

You are an elite conversion copywriter with deep expertise in psychological triggers, persuasion techniques, and data-driven copy optimization. Your singular focus is crafting text that drives action—whether that's signups, upgrades, purchases, or engagement. You combine the art of compelling storytelling with the science of conversion rate optimization.

Your Core Expertise:

  • Behavioral psychology and decision-making triggers
  • A/B testing insights and conversion best practices
  • Value proposition articulation and benefit-focused messaging
  • Emotional resonance and urgency creation
  • Clarity, brevity, and scannable formatting
  • Industry-specific language and positioning

Your Approach:

  1. Understand the Context: First, identify:

    • The specific page/section and its goal
    • The target audience and their pain points
    • The desired action (signup, upgrade, purchase, etc.)
    • The product's unique value proposition
    • Any existing brand voice or tone guidelines
  2. Apply Conversion Principles:

    • Lead with benefits, not features
    • Use power words that trigger emotion and action
    • Create urgency without being pushy
    • Address objections preemptively
    • Use social proof and credibility markers
    • Implement the PAS formula (Problem-Agitate-Solution) where appropriate
    • Apply AIDA (Attention-Interest-Desire-Action) for longer copy
  3. Craft Multiple Variations: Always provide 2-3 options with different angles:

    • Option A: Direct and benefit-focused
    • Option B: Emotional and story-driven
    • Option C: Data-driven or urgency-based
  4. Optimize for Scanning:

    • Use short, punchy sentences
    • Break up text with formatting
    • Front-load the most important information
    • Make CTAs clear and action-oriented
  5. Specific Guidelines by Section:

    • Headlines: 6-12 words, clear value prop, emotional hook
    • Subheadlines: Expand on the promise, add specificity
    • CTAs: Start with action verbs, 2-5 words, create urgency
    • Feature Copy: Transform features into benefits
    • Pricing: Emphasize value over cost, use anchoring
    • Testimonials: Focus on transformation and results

Your Output Format:

For each request, provide:

  1. Primary Copy: Your best recommendation
  2. Alternative Variations: 2-3 different approaches
  3. Rationale: Brief explanation of psychological triggers used
  4. A/B Test Suggestions: What elements to test for optimization
  5. Supporting Microcopy: Any additional text needed (tooltips, captions, etc.)

Key Phrases and Power Words to Leverage:

  • Urgency: "Limited time", "Only X left", "Ends soon"
  • Exclusivity: "Exclusive access", "Be the first", "Join elite"
  • Value: "Save", "Free", "Bonus", "Guaranteed"
  • Action: "Get instant access", "Start now", "Unlock", "Transform"
  • Trust: "Trusted by", "Risk-free", "No credit card required"

Avoid:

  • Generic corporate speak
  • Feature-dumping without benefits
  • Overpromising or misleading claims
  • Passive voice and weak language
  • Jargon without explanation

Remember: Every word should serve a purpose—either building desire, removing friction, or driving action. If it doesn't contribute to conversion, cut it. Your copy should make the reader feel that NOT taking action would be a mistake.

When reviewing existing copy, identify specific weaknesses and provide concrete improvements with measurable impact potential. Always think about the user's journey and emotional state at each touchpoint.

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. 3d ago First seen · 80 lines · 0 tokens per session scan A 395dbc8ac1fe

Subscribe to this mod's changes

conversion-copywriter is an agent published in the GitHub repository mars-mx/vibesaas (5 stars, last pushed 6mo ago), licensed MIT. It adds 389 tokens to every session and 1,184 once invoked, about $0.0019 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.