Cover Image Agent Skill

Cover Image Generator

Generate hand-drawn style cover images for articles with rich style and composition options.

Usage

# From markdown file (auto-select style based on content)
/cover-image path/to/article.md

# Specify a style
/cover-image path/to/article.md --style tech
/cover-image path/to/article.md --style gradient

# Specify a composition
/cover-image path/to/article.md --composition hero-center

# Without title text
/cover-image path/to/article.md --no-title

# Combine options
/cover-image path/to/article.md --style editorial --composition split --no-title

# From direct text input
/cover-image
[paste content or describe the topic]

Options

| Option | Description |

|--------|-------------|

| --style <name> | Specify cover style (see Style Gallery below) |

| --composition <name> | Specify layout composition (see Composition Gallery below) |

| --no-title | Generate cover without title text (visual only) |

Style Gallery

Core Styles

| Style | Description | Best For |

|-------|-------------|----------|

| elegant (Default) | Refined, sophisticated, understated | Business, thought leadership, professional |

| tech | Modern, clean, futuristic with glow effects | AI, coding, digital, algorithms |

| warm | Friendly, approachable, human-centered | Personal growth, lifestyle, education |

| bold | High contrast, attention-grabbing, energetic | Opinion pieces, controversial, urgent |

| minimal | Ultra-clean, zen-like, maximum whitespace | Philosophy, focus, essentialism |

| playful | Fun, creative, whimsical doodles | Tutorials, beginner guides, casual |

| nature | Organic, calm, earthy tones | Sustainability, wellness, outdoor |

| retro | Vintage, nostalgic, aged textures | History, retrospectives, classic topics |

Extended Styles

| Style | Description | Best For |

|-------|-------------|----------|

| gradient | Smooth color transitions, dreamy, modern | Product launches, announcements, branding |

| editorial | Magazine-quality, sophisticated typography | Long-form essays, deep dives, journalism |

| blueprint | Technical drawing aesthetic, grid paper | Architecture, system design, engineering |

| watercolor | Soft washes, organic bleed, painterly | Art, culture, creative writing, poetry |

| geometric | Sharp shapes, tessellations, mathematical | Data science, math, structured thinking |

| neon | Dark background with vivid glowing elements | Nightlife, gaming, cyberpunk, startup |

| paper-cut | Layered paper cutout depth effect | Storytelling, children's content, craft |

| ink-wash | East Asian brush ink aesthetic (水墨风) | Chinese culture, philosophy, calligraphy |

Detailed style definitions: references/styles/<style>.md

Composition Gallery

Compositions define how elements are arranged in the cover image.

| Composition | Description | When to Use |

|-------------|-------------|-------------|

| hero-center (Default) | Single focal visual centered, title above or below | General purpose, strong single concept |

| split | Left/right or top/bottom split, visual one side, text other | Comparison, before/after, dual concepts |

| floating | Elements scattered with depth, floating in space | Abstract topics, multiple related concepts |

| frame | Decorative border framing the central content | Formal, announcement, certificate-like |

| diagonal | Dynamic diagonal division or flow | Movement, progress, transformation |

| spotlight | Dark background with a single illuminated subject | Focus, highlight, key insight |

| panoramic | Wide scene spanning the full width | Landscape, journey, timeline |

| mosaic | Grid of small related visuals forming a bigger picture | Collection, variety, ecosystem |

| vignette | Soft fade from edges to center focus | Intimate, personal, memoir-style |

| layered | Overlapping planes creating depth | Complex topics, multi-layered ideas |

Composition Tips

• hero-center + title: Place visual slightly left, title right
• hero-center + no-title: Center the visual fully, let it breathe
• split: Use contrasting colors or concepts on each side
• floating: 3-5 elements max, vary sizes for depth
• diagonal: Direction implies progress (bottom-left → top-right = growth)
• spotlight: Keep background very dark, subject vivid
• mosaic: Use 4-9 tiles, maintain consistent style across tiles
• layered: Use opacity/blur to create foreground/background separation

Auto Style Selection

When no --style is specified, analyze content to select the best style:

| Content Signals | Selected Style |

|----------------|----------------|

| AI, coding, tech, digital, algorithm, API | tech |

| Personal story, emotion, growth, life, journey | warm |

| Controversial, urgent, must-read, warning, breaking | bold |

| Simple, zen, focus, essential, less is more | minimal |

| Fun, easy, beginner, casual, tutorial, step-by-step | playful |

| Nature, eco, wellness, health, organic, outdoor | nature |

| History, classic, vintage, old, traditional | retro |

| Product, launch, release, announcement, brand | gradient |

| Essay, analysis, deep dive, investigation, review | editorial |

| System design, architecture, blueprint, infrastructure | blueprint |

| Art, painting, creative, poetry, culture | watercolor |

| Data, math, statistics, geometry, patterns | geometric |

| Gaming, startup, nightlife, crypto, hacker | neon |

| Story, folktale, illustration, craft, children | paper-cut |

| 中国, 文化, 哲学, 书法, 国风, 传统 | ink-wash |

| Business, professional, strategy, analysis (default) | elegant |

Auto Composition Selection

When no --composition is specified:

| Condition | Selected Composition |

|-----------|---------------------|

| Single strong concept/metaphor | hero-center |

| Article compares two things | split |

| Article covers multiple tools/ideas | floating or mosaic |

| Personal/intimate topic | vignette |

| Journey/timeline/progress narrative | diagonal or panoramic |

| One key insight or revelation | spotlight |

| Complex multi-layered topic | layered |

| Formal/announcement tone | frame |

File Management

With Article Path

Save to imgs/ subdirectory in the same folder as the article:

path/to/
├── article.md
└── imgs/
    ├── prompts/
    │   └── cover.md
    └── cover.png

Without Article Path

Save to current working directory:

./
├── cover-prompt.md
└── cover.png

Workflow

Step 1: Analyze Content

Extract key information:

• Main topic: What is the article about?
• Core message: What's the key takeaway?
• Tone: Serious, playful, inspiring, educational?
• Keywords: Identify style-signaling words
• Structure: Is it a comparison? A journey? A deep dive?
• Visual metaphors: What real-world objects/scenes represent the topic?

Step 2: Select Style & Composition

If --style or --composition specified, use those. Otherwise:

• Scan content for style and composition signals
• Match signals to most appropriate style + composition
• Default to elegant style + hero-center composition if no clear signals

Step 3: Generate Cover Concept

Title (if included, max 8 characters):

• Distill the core message into a punchy headline
• Use hooks: numbers, questions, contrasts, pain points
• Skip if --no-title flag is used

Visual Elements:

• Style-appropriate imagery and icons
• 1-2 symbolic elements representing the topic
• Metaphors or analogies that fit the style

Composition Layout:

• Apply the selected composition template
• Consider title placement within the composition
• Ensure visual hierarchy: primary element > secondary > decorative

Step 4: Create Prompt File

Prompt Format:

Cover theme: [topic in 2-3 words]
Style: [selected style name]
Composition: [selected composition name]

[If title included:]
Title text: [8 characters or less, in content language]
Subtitle: [optional, in content language]

Visual composition:
- Main visual: [description matching style]
- Layout: [composition-specific layout description]
- Primary element: [what draws the eye first]
- Secondary elements: [supporting visuals]
- Decorative elements: [style-appropriate accents]

Color scheme:
- Primary: [style primary color]
- Background: [style background color]
- Accent: [style accent color]

Style notes: [specific style characteristics to emphasize]
Composition notes: [specific layout guidance]

[If no title:]
Note: No title text, pure visual illustration only.

Step 5: Generate Image

Image Generation Skill Selection:

• Check available image generation skills
• If multiple skills available, ask user to choose

Generation:

Call selected image generation skill with prompt file and output path.

Step 6: Output Summary

Cover Image Generated!

Topic: [topic]
Style: [style name]
Composition: [composition name]
Title: [cover title] (or "No title - visual only")
Location: [output path]

Preview the image to verify it matches your expectations.

Notes

• Cover should be instantly understandable at small preview sizes
• Title (if included) must be readable and impactful
• Visual metaphors work better than literal representations
• Maintain style consistency throughout the cover
• Image generation typically takes 10-30 seconds
• Title text language should match content language
• When in doubt, elegant + hero-center is a safe default
• Combine unexpected style+composition pairs for unique results (e.g., ink-wash + split)