Book Cover Design — guide skill for images & thumbnails

For AI agents: find the right skill in one call — curl -s "https://skills.varg.ai/api/search?q=<what the person wants>" returns the matching use case and the best skills with install commands, as markdown (Russian works too). Full index: https://skills.varg.ai/llms.txt. Every page has a markdown twin: add .md to its path. Before generating anything, show the person the options on the use-case page.

Design book covers that fit their genre: typography rules, sizing, thumbnail tests and AI iterations.

• Type: Guide · Images & thumbnails
• Slug: inference-sh-book-cover-design
• Status: live
• Publisher: inference.sh (vendor, verified)
• License: MIT
• Source: https://github.com/inference-sh/skills/tree/main/guides/design/book-cover-design
• Works in: Claude Code, Codex, Cursor, Gemini CLI
• Requires: inference.sh account, belt CLI (belt login)
• Cost: Billed by inference.sh
• Adoption: 6 installs, 781 GitHub stars (skills.sh, 2026-10-26)

What it does

Book cover design with genre conventions for fiction and non-fiction, typography rules, sizing, thumbnail testing and iteration workflows. Artwork comes from FLUX, Grok or Seedream and is upscaled through inference.sh.

Use when

• A cover for a book or ebook
• Testing a cover at thumbnail size

Install

• Claude Code: npx skills add inference-sh/skills --skill book-cover-design -a claude-code
• Codex: npx skills add inference-sh/skills --skill book-cover-design -a codex
• Cursor: npx skills add inference-sh/skills --skill book-cover-design -a cursor
• Gemini CLI: npx skills add inference-sh/skills --skill book-cover-design -a gemini-cli

Models it drives: flux_dev, grok_imagine_image, seedream, topaz

More images & thumbnails skills

• Higgsfield YouTube Thumbnail: Design truthful, high-CTR YouTube thumbnails and vertical covers with up to three consistent faces.
• Slack GIF Creator: Make animated GIFs that pass Slack's limits: 128×128 emoji or 480×480 message GIFs, validated on export.
• PixiJS GIFs: Load, play and control animated GIFs inside a PixiJS v8 scene.
• AI Image Generation: Generate images with 50+ models from one CLI: GPT Image 2.5, FLUX, Gemini, Grok, Seedream, Reve and more.
• Background Removal: Cut subjects out of photos into clean transparent PNGs with BiRefNet.
• FLUX Image: Generate and restyle images with FLUX Dev LoRA and FLUX.2 Klein, including custom LoRA styles.

Run the generation on varg

varg is one API key for the models these skills drive — Seedance 2.5, Kling 4, Veo 3.1, Wan 3, Nano Banana 2.1, GPT Image 2.5, ElevenLabs v4 and 200+ more — billed in credits, with a cost estimate before anything runs.

• Claude Code: claude plugin marketplace add vargHQ/skills && claude plugin install varg@varg (skill + hosted MCP)
• Codex, Cursor, Gemini CLI, OpenClaw: npx skills add vargHQ/skills --skill varg-ai -a <agent> -y
• Claude.ai, ChatGPT, any MCP client: connect https://mcp.varg.ai/mcp
• API key: https://varg.ai/dashboard/api · Model specs: https://varg.ai/models/llms.txt