arcanea-book-cover SKILL.md skillA
arcanea-book-cover from frankxai/claude-skills-library is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add frankxai/claude-skills-library/arcanea-book-cover@git:20260919.d800c14Pins git:20260919.d800c14 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- frankxai/claude-skills-library
- Path
free-skills/arcanea-book-cover/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260919.d800c14, committed Sep 19, 2026
- First version recorded
- May 25, 2026
- Size
- 8,861 bytes
- Repository stars
- 47
- License
- MIT
Design and generate premium book covers using NB2 (Nano Banana 2 / Gemini 3.1 Flash Image) with deep thinking about book tension, emotion, and genre. Pulls from top book cover design principles (Chip Kidd, Peter Mendelsund, Coralie Bickford-Smith). Auto-activates when user requests book cover, cover art, cover design, or mentions generating a cover for a book project.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Arcanea Book Cover Design Skill Generate premium book covers by thinking deeply about the book first, then translating that thinking into a precision image prompt. NB2 is default. NB Pro only when user specifies "premium" or "hero". ## The 5-Phase Method Do NOT skip phases. The thinking is the skill. The generation is the reward. ### Phase 1: READ THE BOOK (or its architecture) Before writing any prompt, you must understand: 1. **Central tension** — What does the protagonist fight against? What internal conflict mirrors the external? 2. **Emotional register** — Is this grief-heavy? Wonder-heavy? Dread-heavy? A dark comedy? Bittersweet? Name it precisely. 3. **Iconic image** — What ONE visual moment defines the book? The image a reader would tattoo on themselves. 4. **Genre expectations vs subversion** — What do readers of this genre expect? What should you give them, and what should you withhold? 5. **Color emotional key** — What color (singular) carries the book's feeling? If the book has a `book.yaml` or outline, read them. If the book has existing chapters, read at least one opening and one pivotal scene. ### Phase 2: PULL BEST PRACTICES …
Read the whole file at its exact version.
How to install
mdr add frankxai/claude-skills-library/arcanea-book-cover@sha256:13b4e5ca43c33661The line at the top of this page pins the label git:20260919.d800c14, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_hwqhnkheedhqtspd)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between May 25, 2026 and Sep 19, 2026, about one every 59 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260919.d800c14 latest | 2026-09-19 | d800c14 | 8,861 B | A | view · diff |
| git:20260622.279de9d | 2026-06-22 | 279de9d | 8,863 B | A | view · diff |
| git:20260525.468c26e | 2026-05-25 | 468c26e | 8,863 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (8861 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
frankxai/claude-skills-library · 47 stars · license MIT · pushed 2026-10-20 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_hwqhnkheedhqtspd GET https://markdownregistry.com/api/v1/resolve?ref=frankxai/claude-skills-library/arcanea-book-cover GET https://markdownregistry.com/api/v1/blob/13b4e5ca43c33661f62df74af13fe64c41b885cc44dea7a3f32a5fcb9d8dd753
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.