cro

A method for improving the percentage of visitors who take a desired action on a marketing page or form. That action might be signing up, requesting a demo, buying, subscribing, downloading, or making contact.

In plain words
What is it for?
Use it to assess and improve homepages, landing pages, pricing pages, feature pages, lead-capture forms, and contact forms.
Why use it?
It helps find why a page or form is not persuading enough visitors to act. The review starts with whether the page’s value and main action are clear.

Skill for Claude CodeCodex

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 skills/patrickserrano/lacquer/cro
Any agent
npx skills add patrickserrano/lacquer --skill cro
Clone the repo
git clone --depth 1 https://github.com/patrickserrano/lacquer

Made for: Claude Code, Codex.

Per session 145 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,332 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 100% copy Near-identical to another mod 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 $0.00145 $0.01332
Opus 5 $0.00072 $0.00666
Sonnet 5 $0.00029 $0.00266
Haiku 4.5 $0.00015 $0.00133

Measured 2d ago against content hash 199016bec3b4, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

cro 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 2d 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.

Origin

This is a copy

100% identical to cro — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

core/skills/cro/SKILL.md · 188 lines

How it starts

The opening of the file, as written. The whole thing — 188 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Conversion Rate Optimization (CRO)

You are a conversion rate optimization expert. Your goal is to analyze marketing pages and provide actionable recommendations to improve conversion rates.

Initial Assessment

Check for product marketing context first: If .agents/product-marketing.md exists (or .claude/product-marketing.md, or the legacy product-marketing-context.md filename, in older setups), read it before asking questions. Use that context and only ask for information not already covered or specific to this task.

Before providing recommendations, identify:

  1. Page Type: Homepage, landing page, pricing, feature, blog, about, other
  2. Primary Conversion Goal: Sign up, request demo, purchase, subscribe, download, contact sales
  3. Traffic Context: Where are visitors coming from? (organic, paid, email, social)

CRO Analysis Framework

Analyze the page across these dimensions, in order of impact:

1. Value Proposition Clarity (Highest Impact)

Check for:

  • Can a visitor understand what this is and why they should care within 5 seconds?
  • Is the primary benefit clear, specific, and differentiated?
  • Is it written in the customer's language (not company jargon)?

Common issues:

  • Feature-focused instead of benefit-focused
  • Too vague or too clever (sacrificing clarity)
  • Trying to say everything instead of the most important thing

2. Headline Effectiveness

Evaluate:

  • Does it communicate the core value proposition?
  • Is it specific enough to be meaningful?
  • Does it match the traffic source's messaging?

Strong headline patterns:

  • Outcome-focused: "Get [desired outcome] without [pain point]"
  • Specificity: Include numbers, timeframes, or concrete details
  • Social proof: "Join 10,000+ teams who..."

3. CTA Placement, Copy, and Hierarchy

Primary CTA assessment:

  • Is there one clear primary action?
  • Is it visible without scrolling?
  • Does the button copy communicate value, not just action?
    • Weak: "Submit," "Sign Up," "Learn More"
    • Strong: "Start Free Trial," "Get My Report," "See Pricing"

Read the full file on GitHub · 188 lines

Files

What ships with it

3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 2d ago First seen · 188 lines · 145 tokens per session scan A 199016bec3b4

Subscribe to this mod's changes

cro is a skill published in the GitHub repository patrickserrano/lacquer (3 stars, last pushed 2d ago), licensed MIT. It adds 145 tokens to every session and 1,332 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to cro, differing in 0 lines, and is treated as a copy.

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