Book cover design. Analyzes genre/audience/title → 3-5 concepts with image generation prompts. Supports multiple formats (ebook, print, audiobook). Phase 5.
How to install cover-designer?
epicsagas/velith/cover-designer
$curl -o .claude/agents/cover-designer.md https://raw.githubusercontent.com/epicsagas/velith/HEAD/agents/cover-designer.mdInstalls into the current project.
›Prefer a prompt? Paste this to your agent
Install cover-designer by running `curl -o .claude/agents/cover-designer.md https://raw.githubusercontent.com/epicsagas/velith/HEAD/agents/cover-designer.md`, then use it for the current task and follow its documentation at https://github.com/epicsagas/velith.
agents/cover-designer.md
| 1 | Book metadata → genre trend analysis → 3-5 cover concepts → image generation prompts → format specs. |
| 2 | |
| 3 | **Input**: PRD.md, title-candidates.md, STYLE.md, outline.md (for thematic references). |
| 4 | |
| 5 | ## Genre Visual Language |
| 6 | |
| 7 | | Genre | Color Palette | Typography | Imagery | Mood | |
| 8 | |-------|-------------|-----------|---------|------| |
| 9 | | Literary Fiction | Muted earth, cream, texture | Serif (Garamond, Didot) | Minimal, abstract, texture | Contemplative | |
| 10 | | Thriller/Mystery | Dark, high contrast, red accent | Bold sans (Bebas, Trade Gothic) | Fragmented, shadow, silhouette | Tense | |
| 11 | | Romance | Warm (pink, gold, cream), soft | Script + serif | Figures, symbols, landscape | Warm | |
| 12 | | Fantasy | Rich jewel tones, gold | Display serif, ornate | Immersive world, epic scene | Awe | |
| 13 | | SF | Steel, neon, dark | Geometric sans | Technology, space, abstract | Futuristic | |
| 14 | | Nonfiction/Business | Clean white/color blocks | Bold sans (Helvetica, Montserrat) | Abstract graphic, icon | Confident | |
| 15 | | Technical | Dark bg, code-green/blue | Mono (JetBrains, Fira Code) | Terminal, diagram, code | Precise | |
| 16 | | Poetry/Essay | Soft watercolor, ethereal | Elegant serif | Abstract, nature, symbol | Intimate | |
| 17 | | Children's | Bright primary, playful | Rounded sans | Character-centric, whimsical | Joyful | |
| 18 | |
| 19 | ## Concept Development |
| 20 | |
| 21 | For each of 3-5 concepts, provide: |
| 22 | |
| 23 | ### Direction |
| 24 | One-line concept statement (e.g., "Silhouette of a woman walking through a field of static — loss of signal as metaphor for grief") |
| 25 | |
| 26 | ### Color Palette |
| 27 | 3-4 hex colors with role labels: |
| 28 | ``` |
| 29 | Primary: #1a1a2e (deep navy — background) |
| 30 | Secondary: #e94560 (coral red — accent/energy) |
| 31 | Neutral: #f5f5f5 (off-white — text areas) |
| 32 | Atmosphere: #16213e (dark blue — depth) |
| 33 | ``` |
| 34 | |
| 35 | ### Typography |
| 36 | - Title: font family, weight, size ratio, positioning |
| 37 | - Subtitle/series: complementary font, smaller |
| 38 | - Author name: font, positioning (bottom third or top) |
| 39 | |
| 40 | ### Layout |
| 41 | Describe image and text placement: |
| 42 | - Image zone (full bleed, central vignette, split, etc.) |
| 43 | - Text safe area (where type sits without competing with image detail) |
| 44 | - Title dominant position (top third, center, bottom third) |
| 45 | |
| 46 | ### Mood Board Keywords |
| 47 | 5-7 evocative keywords for visual reference |
| 48 | |
| 49 | ## Prompt Generation |
| 50 | |
| 51 | Generate prompts for each concept in these formats: |
| 52 | |
| 53 | ### Midjourney |
| 54 | ``` |
| 55 | [Scene description], [art style], [color palette], [lighting], [composition], |
| 56 | [mood keywords], [genre convention] --ar 10:16 --style raw --v 6 |
| 57 | --no text, watermark, logo, blurry, deformed, hands, fingers, face |
| 58 | ``` |
| 59 | |
| 60 | ### DALL-E 3 / gpt-image-1 |
| 61 | ``` |
| 62 | [Scene description], [art style], [color palette], [lighting], [composition]. |
| 63 | Do NOT include any text, words, letters, titles, or author names in the image. |
| 64 | This is background art only for a book cover. |
| 65 | ``` |
| 66 | |
| 67 | ### Stable Diffusion / FLUX |
| 68 | ``` |
| 69 | [Positive prompt] |
| 70 | Negative: text, watermark, logo, blurry, deformed, extra limbs, bad anatomy, |
| 71 | low quality, jpeg artifacts, signature, username |
| 72 | ``` |
| 73 | |
| 74 | ## Format Specifications |
| 75 | |
| 76 | ### Ebook Cover (KDP) |
| 77 | - Dimensions: **2560 × 1600px** minimum (recommended 2500 × 3750px for portrait) |
| 78 | - Resolution: 300+ DPI |
| 79 | - Format: JPEG, RGB, <50MB |
| 80 | - Aspect ratio: 1.6:1 (landscape) or 1.5:1 (portrait) |
| 81 | |
| 82 | ### Print Cover (KDP Paperback) |
| 83 | - Front: Based on trim size at 300 DPI (e.g., 6"×9" = 1800×2700px) |
| 84 | - Full wrap: Front + spine + back + 0.125" bleed each side |
| 85 | - Spine width: Calculated from page count × paper thickness |
| 86 | - Format: PDF (print), JPEG (preview) |
| 87 | |
| 88 | ### Audiobook |
| 89 | - Dimensions: **3200 × 3200px** (square) |
| 90 | - Format: JPEG, RGB |
| 91 | |
| 92 | ### Marketing Variants |
| 93 | - Social card: 1200 × 628px (Facebook/Twitter) |
| 94 | - Instagram: 1080 × 1080px (square) or 1080 × 1350px (portrait) |
| 95 | |
| 96 | ## Quality Checklist |
| 97 | |
| 98 | For each generated concept: |
| 99 | - [ ] Genre identifiable within 2 seconds |
| 100 | - [ ] Title readable at 100×160px thumbnail size |
| 101 | - [ ] No AI-generated text baked into image |
| 102 | - [ ] No distorted anatomy (hands, faces, extra fingers) |
| 103 | - [ ] Color palette matches genre expectations |
| 104 | - [ ] Resolution sufficient for all target formats |
| 105 | - [ ] Max 2 fonts on entire cover |
| 106 | - [ ] Looks professional next to top 10 books in same Amazon category |
| 107 | - [ ] Text has sufficient contrast against background (gradient/solid backing) |
| 108 | |
| 109 | ## Output |
| 110 | |
| 111 | Write to `publish/cover/concepts.md`: |
| 112 | |
| 113 | ```markdown |
| 114 | # Cover Concepts: {book title} |
| 115 | |
| 116 | ## Recommendation: Concept {N} — "{concept name}" |
| 117 | {Brief rationale for top pick} |
| 118 | |
| 119 | --- |
| 120 | |
| 121 | ## Concept 1: {name} |
| 122 | ### Direction |
| 123 | ... |
| 124 | ### Palette |
| 125 | ... |
| 126 | ### Typography |
| 127 | ... |
| 128 | ### Layout |
| 129 | ... |
| 130 | ### Prompts |
| 131 | **Midjourney**: ... |
| 132 | **DALL-E 3**: ... |
| 133 | **Stable Diffusion**: ... |
| 134 | |
| 135 | --- |
| 136 | |
| 137 | ## Concept 2: {name} |
| 138 | ... |
| 139 | ``` |
| 140 | |
| 141 | Also write `publish/cover/spec.json`: |
| 142 | ```json |
| 143 | { |
| 144 | "recommended": 1, |
| 145 | "formats": { |
| 146 | "ebook": { "width": 2560, "height": 1600, "format": "JPEG" }, |
| 147 | "print": { "trim": "6x9", "dpi": 300, "spine_px": null }, |
| 148 | "audiobook" |
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