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Agent skill

Cro

by Nexus-JPF in Nexus-JPF/note-companion

When the user wants to optimize, improve, or increase conversions on any marketing page or form — including homepage, landing pages, pricing pages, feature pages, lead capture forms, or contact forms.

MITAuto-check passedMarketing & SEO

Install Cro

skills CLI
$ npx skills add Nexus-JPF/note-companion --skill cro -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install Nexus-JPF/note-companion cro --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/Nexus-JPF/note-companion.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/cro .claude/skills/cro && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
cro
GitHub stars
870
Used in
5 other repos
Token cost
~1.5k tokens
SKILL.md length
698 words
Files
4 (incl. references)
Skills in repo
18
Repo updated
First seen
Licence
MIT

At a glance

When the user wants to optimize, improve, or increase conversions on any marketing page or form — including homepage, landing pages, pricing pages, feature pages, lead capture forms, or contact forms.

  • Works in 7 steps: Value Proposition Clarity (Highest Impact) → Headline Effectiveness → CTA Placement, Copy, and Hierarchy → …
  • Wants to optimize
  • SKILL.md covers Initial Assessment, CRO Analysis Framework, Output Format and Page-Specific Frameworks, plus 4 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Cro is an agent skill from Nexus-JPF/note-companion. When the user wants to optimize, improve, or increase conversions on any marketing page or form — including homepage, landing pages, pricing pages, feature pages, lead capture forms, or contact forms. Also use when the user says 'CRO,' 'conversion rate optimization,' 'this page isn't converting,' 'improve conversions,' 'why isn't this page working,' 'my landing page sucks,' 'form abandonment,' 'nobody's converting,' 'low conversion rate,' or 'this page needs work.' Use this even if the user just shares a URL and…

Its SKILL.md is about 1.5k tokens, which your agent loads only when the skill is triggered. The skill folder holds 5 other files, including reference files (for example `evals/evals.json`, `references/experiments.md` and `references/form.md`).

It sits in Marketing & SEO, covering Conversion rate optimization and Landing pages. The repository describes itself as: Note Companion: AI assistant for Obsidian that goes beyond just a chat. (prev File Organizer 2000). The licence is MIT.

When your agent uses it

  • Wants to optimize
  • Increase conversions on any marketing page
  • Form — including homepage
  • Lead capture forms

Example prompts

  • “conversion rate optimization,”
  • “this page isn”
  • “improve conversions,”
  • “/cro”

Workflow steps

7 steps, taken from the step headings in SKILL.md.

  1. Value Proposition Clarity (Highest Impact)
  2. Headline Effectiveness
  3. CTA Placement, Copy, and Hierarchy
  4. Visual Hierarchy and Scannability
  5. Trust Signals and Social Proof
  6. Objection Handling
  7. Friction Points

What it can do on your machine

Read from SKILL.md and the folder at commit 9cad635. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Cro loads about 1.5k tokens when it runs, and up to ~6.1k if it reads all its reference files. Until then it costs about 165 tokens; SKILL.md has 698 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~165
When it runs · the whole SKILL.md, loaded when a task matches
~1.5k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~6.1k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from Nexus-JPF/note-companion at commit 9cad635, republished under its MIT licence (© Nexus-JPF). 698 words, ~1,524 tokens.

Download SKILL.mdSave it as .claude/skills/cro/SKILL.md (or your agent's skills folder). This skill also uses 3 other files; get the full folder from GitHub.
name
cro
description
When the user wants to optimize, improve, or increase conversions on any marketing page or form — including homepage, landing pages, pricing pages, feature pages, lead capture forms, or contact forms. Also use when the user says 'CRO,' 'conversion rate optimization,' 'this page isn't converting,' 'improve conversions,' 'why isn't this page working,' 'my landing page sucks,' 'form abandonment,' 'nobody's converting,' 'low conversion rate,' or 'this page needs work.' Use this even if the user just shares a URL and asks for feedback. For signup/registration flows, see signup. For post-signup activation, see onboarding. For popups/modals, see popups.
metadata.version
2.0.0

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"

CTA hierarchy:

  • Is there a logical primary vs. secondary CTA structure?
  • Are CTAs repeated at key decision points?
4. Visual Hierarchy and Scannability

Check:

  • Can someone scanning get the main message?
  • Are the most important elements visually prominent?
  • Is there enough white space?
  • Do images support or distract from the message?
5. Trust Signals and Social Proof

Types to look for:

  • Customer logos (especially recognizable ones)
  • Testimonials (specific, attributed, with photos)
  • Case study snippets with real numbers
  • Review scores and counts
  • Security badges (where relevant)

Placement: Near CTAs and after benefit claims

6. Objection Handling

Common objections to address:

  • Price/value concerns
  • "Will this work for my situation?"
  • Implementation difficulty
  • "What if it doesn't work?"

Address through: FAQ sections, guarantees, comparison content, process transparency

7. Friction Points

Look for:

  • Too many form fields
  • Unclear next steps
  • Confusing navigation
  • Required information that shouldn't be required
  • Mobile experience issues
  • Long load times
Show full SKILL.md (272 more words)Show less

Output Format

Structure your recommendations as:

Quick Wins (Implement Now)

Easy changes with likely immediate impact.

High-Impact Changes (Prioritize)

Bigger changes that require more effort but will significantly improve conversions.

Test Ideas

Hypotheses worth A/B testing rather than assuming.

Copy Alternatives

For key elements (headlines, CTAs), provide 2-3 alternatives with rationale.

Page-Specific Frameworks

Homepage CRO
  • Clear positioning for cold visitors
  • Quick path to most common conversion
  • Handle both "ready to buy" and "still researching"
Landing Page CRO
  • Message match with traffic source
  • Single CTA (remove navigation if possible)
  • Complete argument on one page
Pricing Page CRO
  • Clear plan comparison
  • Recommended plan indication
  • Address "which plan is right for me?" anxiety
Feature Page CRO
  • Connect feature to benefit
  • Use cases and examples
  • Clear path to try/buy
Blog Post CRO
  • Contextual CTAs matching content topic
  • Inline CTAs at natural stopping points

Experiment Ideas

When recommending experiments, consider tests for:

  • Hero section (headline, visual, CTA)
  • Trust signals and social proof placement
  • Pricing presentation
  • Form optimization
  • Navigation and UX

For comprehensive experiment ideas by page type: See references/experiments.md

Task-Specific Questions

  1. What's your current conversion rate and goal?
  2. Where is traffic coming from?
  3. What does your signup/purchase flow look like after this page?
  4. Do you have user research, heatmaps, or session recordings?
  5. What have you already tried?
  • signup: If the issue is in the signup process itself
  • popups: If considering popups as part of the strategy
  • copywriting: If the page needs a complete copy rewrite
  • ab-testing: To properly test recommended changes

Form Optimization

For detailed form CRO guidance — including field optimization, multi-step forms, error handling, and form-specific experiments — see references/form.md.

© Nexus-JPF, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 3 other files (references) in .agents/skills/cro of Nexus-JPF/note-companion.

  • SKILL.md
  • evals/evals.json
  • references/experiments.md
  • references/form.md

Open the folder on GitHubat commit 9cad635

Used in 5 other repositories

We found 7 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 5 other GitHub owners. This page covers the copy in Nexus-JPF/note-companion, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Cro next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Cro compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Cro this skillNexus-JPF/note-companion8705 repos~1.5kAutomated safety check: PassMIT
Cro Optimizationognjengt/founder-skills440—~2.4kAutomated safety check: PassMIT
Crosickn33/agentic-awesome-skills47k1 repos~1.6kAutomated safety check: PassMIT
Landing Page Copyrampstackco/claude-skills941—~2.7kAutomated safety check: PassMIT
Page CroOpenClaudia/openclaudia-skills713—~1.6kAutomated safety check: PassMIT
Croindranilbanerjee/digital-marketing-pro8591 repos~4kAutomated safety check: PassMIT

Similar skills

  • Cro Optimization

    ognjengt/founder-skills

    Analyzes landing pages and provides detailed CRO (Conversion Rate Optimization) recommendations.

    440 GitHub stars~2.4k tokensUpdated 4 mo ago
    Marketing & SEOAuto-check passed

  • Cro

    sickn33/agentic-awesome-skills

    When the user wants to optimize, improve, or increase conversions on any marketing page or form — including homepage, landing pages, pricing pages, feature pages, lead capture forms, or contact forms.

    47k GitHub starsUsed in 1 repo~1.6k tokens
    Marketing & SEOAuto-check passed

  • Landing Page Copy

    rampstackco/claude-skills

    Write landing page copy with attention to the hero, value proposition, social proof, objection handling, and conversion-focused CTAs.

    941 GitHub stars~2.7k tokensUpdated 3 days ago
    Marketing & SEOAuto-check passed

  • Page Cro

    OpenClaudia/openclaudia-skills

    Audit and optimize landing pages for conversion rate. An agent skill from OpenClaudia/openclaudia-skills.

    713 GitHub stars~1.6k tokensUpdated 21 days ago
    Marketing & SEOAuto-check passed

  • Cro

    indranilbanerjee/digital-marketing-pro

    Audit landing pages, forms, pricing pages, and checkout flows for conversion killers, and design statistically sound A/B tests — ICE-prioritized recommendations, hypothesis templates, and…

    859 GitHub starsUsed in 1 repo~4k tokens
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  • Cro Methodology

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    Audit websites and landing pages for conversion issues and design evidence-based A/B tests.

    2.4k GitHub stars~4.3k tokensUpdated 29 days ago
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All 18 skills in this repo

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  • Customer Research

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  • Marketing Plan

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  • Competitor Profiling

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    When the user wants to research, profile, or analyze competitors from their URLs.

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  • Onboarding

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    When the user wants to optimize post-signup onboarding, user activation, first-run experience, or time-to-value.

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  • Image

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    When the user wants to create, generate, edit, or optimize images for marketing — blog heroes, social graphics, product mockups, profile banners, listing visuals, or brand assets.

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Categories

Questions about Cro

What does Cro do?

When the user wants to optimize, improve, or increase conversions on any marketing page or form — including homepage, landing pages, pricing pages, feature pages, lead capture forms, or contact forms. Cro is an agent skill from Nexus-JPF/note-companion. When the user wants to optimize, improve, or increase conversions on any marketing page or form — including homepage, landing pages, pricing pages, feature pages, lead capture forms, or contact forms.

When should I use Cro?

Cro fits situations like: wants to optimize; increase conversions on any marketing page; form — including homepage; lead capture forms.

How do I install Cro in Claude Code?

Run `npx skills add Nexus-JPF/note-companion --skill cro -a claude-code`. Or copy the skill folder (.agents/skills/cro in Nexus-JPF/note-companion) into .claude/skills/cro in your project. Claude Code loads it when a task matches its description.

How do I install Cro in Codex?

Run `npx skills add Nexus-JPF/note-companion --skill cro -a codex`. Or copy the skill folder (.agents/skills/cro in Nexus-JPF/note-companion) into .agents/skills/cro in your project. Codex loads it when a task matches its description.

Can I use Cro in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add Nexus-JPF/note-companion --skill cro -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/cro, .gemini/skills/cro, .github/skills/cro and .opencode/skills/cro in your project.

What does Cro need to run?

SKILL.md names no scripts, command-line tools or credentials: Cro is instructions for the agent only.

Does Cro access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Cro safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Cro use?

Cro is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Cro use?

About 1.5k tokens (SKILL.md is roughly 6.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 4.5k tokens, read only when the agent opens those files.

What are the alternatives to Cro?

Skills that share tags, products or a category with Cro: Cro Optimization (ognjengt/founder-skills, 440 stars), Cro (sickn33/agentic-awesome-skills, 47k stars), Landing Page Copy (rampstackco/claude-skills, 941 stars) and Page Cro (OpenClaudia/openclaudia-skills, 713 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Cro?

Nexus-JPF (a GitHub organization) maintains it in Nexus-JPF/note-companion, which has 870 GitHub stars. The repository holds 18 skills in this directory. The repository was last updated on October 7, 2026.

Source: Nexus-JPF/note-companion on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.