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Get Started Free →ランディングページ、ホームページ、料金ページ等のマーケティングコピーを作成・改善するスキル。 「コピーを書いて」「LPのコピー作成」「ヘッドライン考えて」等のリクエストで発動。 For email copy, see email-sequence. For popup copy, see popup-cro.
.claude/skills/minicoohei-copywriting/SKILL.md| Test case | Without → With | Effect | Δ tokens | Δ turns |
|---|---|---|---|---|
| case-09 | ✗→✓ | ▲ Improved | 39% | 0% |
| case-04 | ✗→✓ | ▲ Improved | 126% | 0% |
| case-05 | ✗→✓ | ▲ Improved | 203% | 0% |
| case-12 | ✗→✓ | ▲ Improved | 124% | 0% |
| case-13 | ✓→✗ | ▼ Worse | 101% | 0% |
You are an expert conversion copywriter. Your goal is to write marketing copy that is clear, compelling, and drives action.
Check for product marketing context first: If .claude/product-marketing-context.md exists, read it before asking questions. Use that context and only ask for information not already covered or specific to this task.
Gather this context (ask if not provided):
If you have to choose between clear and creative, choose clear.
Features: What it does. Benefits: What that means for the customer.
Use words your customers use. Mirror voice-of-customer from reviews, interviews, support tickets.
Each section should advance one argument. Build a logical flow down the page.
For thorough line-by-line review, use the copy-editing skill after your draft.
Get to the point. Don't bury the value in qualifications.
❌ Slack lets you share files instantly, from documents to images, directly in your conversations
✅ Need to share a screenshot? Send as many documents, images, and audio files as your heart desires.
Questions engage readers and make them think about their own situation.
Analogies make abstract concepts concrete and memorable.
Puns and wit make copy memorable—but only if it fits the brand and doesn't undermine clarity.
Headline
Example formulas:
For comprehensive headline formulas: See references/copy-frameworks.md
For natural transition phrases: See references/natural-transitions.md
Subheadline
Primary CTA
| Section | Purpose | |---------|---------| | Social Proof | Build credibility (logos, stats, testimonials) | | Problem/Pain | Show you understand their situation | | Solution/Benefits | Connect to outcomes (3-5 key benefits) | | How It Works | Reduce perceived complexity (3-4 steps) | | Objection Handling | FAQ, comparisons, guarantees | | Final CTA | Recap value, repeat CTA, risk reversal |
For detailed section types and page templates: See references/copy-frameworks.md
Weak CTAs (avoid):
Strong CTAs (use):
Formula: Action Verb] + What They Get] + Qualifier if needed]
Examples:
Before writing, establish:
Formality level:
Brand personality:
Maintain consistency, but adjust intensity:
When writing copy, provide:
Organized by section:
For key elements, explain:
For headlines and CTAs, provide 2-3 options:
| Case | Status | Duration (ms) | Turns | Tokens | Tool calls | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Without | With | Δ | Without | With | Δ | Without | With | Δ | Without | With | Δ | ||
case-09 | fail→pass | 17,639 | 14,703 | -17% | 1 | 1 | 0% | 2,750 | 3,819 | +39% | 0 | 0 | — |
case-01 | pass→pass | 21,881 | 18,533 | -15% | 1 | 1 | 0% | 3,420 | 4,670 | +37% | 0 | 0 | — |
case-02 | fail→fail | 23,817 | 16,516 | -31% | 1 | 1 | 0% | 3,911 | 4,208 | +8% | 0 | 0 | — |
case-03 | pass→pass | 10,050 | 9,644 | -4% | 1 | 1 | 0% | 1,652 | 3,180 | +92% | 0 | 0 | — |
case-04 | fail→pass | 7,889 | 9,662 | +22% | 1 | 1 | 0% | 1,349 | 3,044 | +126% | 0 | 0 | — |
case-05 | fail→pass | 9,196 | 16,090 | +75% | 1 | 1 | 0% | 1,337 | 4,056 | +203% | 0 | 0 | — |
case-06 | pass→pass | 7,593 | 6,956 | -8% | 1 | 1 | 0% | 1,305 | 2,642 | +102% | 0 | 0 | — |
case-07 | pass→pass | 12,401 | 9,300 | -25% | 1 | 1 | 0% | 1,884 | 3,032 | +61% | 0 | 0 | — |
case-08 | fail→fail | 13,320 | 12,008 | -10% | 1 | 1 | 0% | 2,118 | 3,454 | +63% | 0 | 0 | — |
case-10 | fail→fail | 7,787 | 12,042 | +55% | 1 | 1 | 0% | 1,412 | 3,509 | +149% | 0 | 0 | — |
case-11 | fail→fail | 12,863 | 15,051 | +17% | 1 | 1 | 0% | 2,425 | 3,962 | +63% | 0 | 0 | — |
case-12 | fail→pass | 8,870 | 9,439 | +6% | 1 | 1 | 0% | 1,408 | 3,153 | +124% | 0 | 0 | — |
case-13 | pass→fail | 10,099 | 8,820 | -13% | 1 | 1 | 0% | 1,514 | 3,041 | +101% | 0 | 0 | — |
case-14 | pass→pass | 12,867 | 14,679 | +14% | 1 | 1 | 0% | 2,214 | 3,951 | +78% | 0 | 0 | — |
case-15 | pass→pass | 12,635 | 9,334 | -26% | 1 | 1 | 0% | 1,765 | 3,130 | +77% | 0 | 0 | — |
case-16 | fail→fail | 9,182 | 10,128 | +10% | 1 | 1 | 0% | 1,452 | 3,087 | +113% | 0 | 0 | — |
case-17 | fail→fail | 16,566 | 14,249 | -14% | 1 | 1 | 0% | 2,181 | 3,704 | +70% | 0 | 0 | — |
case-18 | pass→pass | 9,210 | 8,031 | -13% | 1 | 1 | 0% | 1,517 | 2,852 | +88% | 0 | 0 | — |
case-19 | fail→fail | 3,468 | 7,459 | +115% | 1 | 1 | 0% | 544 | 2,886 | +431% | 0 | 0 | — |
case-20 | pass→pass | 5,730 | 6,236 | +9% | 1 | 1 | 0% | 1,122 | 2,673 | +138% | 0 | 0 | — |
case-21 | pass→pass | 12,434 | 11,706 | -6% | 1 | 1 | 0% | 2,489 | 3,955 | +59% | 0 | 0 | — |
case-22 | pass→pass | 14,829 | 17,094 | +15% | 1 | 1 | 0% | 2,462 | 4,293 | +74% | 0 | 0 | — |
DecimalAI ran this skill against gemini-3.6-flash twice over the same eval suite — once with the skill loaded and once without — and compared the two runs case by case. 22 cases were attempted. The headline lift of +14 percentage points is the difference between those two pass rates over the 22 comparable cases. 1 case got worse with the skill loaded, and it is included in that figure.
Without the skill loaded, the model failed this case. With it loaded, the same prompt on the same model passed. This is one improved case from the latest verified run; every case, including any that regressed, is in the table above.
Other measured skills in the registry, with their headline benchmark lift.