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Cover Image Generator

Generate elegant cover images for articles with 5-dimensional customization.

Usage

# Auto-select dimensions based on content
/canghe-cover-image path/to/article.md

# Quick mode: skip confirmation
/canghe-cover-image article.md --quick

# Specify dimensions
/canghe-cover-image article.md --type conceptual --palette warm --rendering flat-vector

# Style presets (shorthand for palette + rendering)
/canghe-cover-image article.md --style blueprint

# With reference images
/canghe-cover-image article.md --ref style-ref.png

# Direct content input
/canghe-cover-image --palette mono --aspect 1:1 --quick
[paste content]

Options

Five Dimensions

Auto-selection rules: references/auto-selection.md

Galleries

Types : hero, conceptual, typography, metaphor, scene, minimal → Details: references/types.md

Palettes : warm, elegant, cool, dark, earth, vivid, pastel, mono, retro → Details: references/palettes/

Renderings : flat-vector, hand-drawn, painterly, digital, pixel, chalk → Details: references/renderings/

Text Levels : none (pure visual) | title-only (default) | title-subtitle | text-rich (with tags) → Details: references/dimensions/text.md

Mood Levels : subtle (low contrast) | balanced (default) | bold (high contrast) → Details: references/dimensions/mood.md

Fonts : clean (sans-serif) | handwritten | serif | display (bold decorative) → Details: references/dimensions/font.md

File Structure

Output directory per default_output_dir preference:

• same-dir: {article-dir}/

• imgs-subdir: {article-dir}/imgs/

• independent (default): cover-image/{topic-slug}/

  <output-dir>/ ├── source-{slug}.{ext} # Source files ├── refs/ # Reference images (if provided) │ ├── ref-01-{slug}.{ext} │ └── ref-01-{slug}.md # Description file ├── prompts/cover.md # Generation prompt └── cover.png # Output image

Slug : 2-4 words, kebab-case. Conflict: append -YYYYMMDD-HHMMSS

Workflow

Progress Checklist

Cover Image Progress:
- [ ] Step 0: Check preferences (EXTEND.md) ⛔ BLOCKING
- [ ] Step 1: Analyze content + save refs + determine output dir
- [ ] Step 2: Confirm options (6 dimensions) ⚠️ unless --quick
- [ ] Step 3: Create prompt
- [ ] Step 4: Generate image
- [ ] Step 5: Completion report

Flow

Input → [Step 0: Preferences] ─┬─ Found → Continue
                               └─ Not found → First-Time Setup ⛔ BLOCKING → Save EXTEND.md → Continue
        ↓
Analyze + Save Refs → [Output Dir] → [Confirm: 6 Dimensions] → Prompt → Generate → Complete
                                              ↓
                                     (skip if --quick or all specified)

Step 0: Load Preferences ⛔ BLOCKING

Check EXTEND.md existence (priority: project → user):

test -f .canghe-skills/canghe-cover-image/EXTEND.md && echo "project"
test -f "$HOME/.canghe-skills/canghe-cover-image/EXTEND.md" && echo "user"

CRITICAL : If not found, complete setup BEFORE any other steps or questions.

Step 1: Analyze Content

1. Save reference images (if provided) → references/workflow/reference-images.md
2. Save source content (if pasted, save to source.md)
3. Analyze content : topic, tone, keywords, visual metaphors
4. Deep analyze references ⚠️: Extract specific, concrete elements (see reference-images.md)
5. Detect language : Compare source, user input, EXTEND.md preference
6. Determine output directory : Per File Structure rules

Step 2: Confirm Options ⚠️

Full confirmation flow: references/workflow/confirm-options.md

Step 3: Create Prompt

Save to prompts/cover.md. Template: references/workflow/prompt-template.md

CRITICAL - References in Frontmatter :

• Files saved to refs/ → Add to frontmatter references list
• Style extracted verbally (no file) → Omit references, describe in body
• Before writing → Verify: test -f refs/ref-NN-{slug}.{ext}

Reference elements in body MUST be detailed, prefixed with "MUST"/"REQUIRED", with integration approach.

Step 4: Generate Image

1. Backup existing cover.png if regenerating
2. Check image generation skills ; if multiple, ask preference
3. Process references from prompt frontmatter:
   • direct usage → pass via --ref (use ref-capable backend)
   • style/palette → extract traits, append to prompt
4. Generate : Call skill with prompt file, output path, aspect ratio
5. On failure: auto-retry once

Step 5: Completion Report

Cover Generated!

Topic: [topic]
Type: [type] | Palette: [palette] | Rendering: [rendering]
Text: [text] | Mood: [mood] | Font: [font] | Aspect: [ratio]
Title: [title or "visual only"]
Language: [lang] | Watermark: [enabled/disabled]
References: [N images or "extracted style" or "none"]
Location: [directory path]

Files:
✓ source-{slug}.{ext}
✓ prompts/cover.md
✓ cover.png

Image Modification

Composition Principles

• Whitespace : 40-60% breathing room
• Visual anchor : Main element centered or offset left
• Characters : Simplified silhouettes; NO realistic humans
• Title : Use exact title from user/source; never invent

Extension Support

Custom configurations via EXTEND.md. See Step 0 for paths.

Supports: Watermark | Preferred dimensions | Default aspect/output | Quick mode | Custom palettes | Language

Schema: references/config/preferences-schema.md

References

Dimensions : text.md | mood.md | font.md Palettes : references/palettes/ Renderings : references/renderings/ Types : references/types.md Auto-Selection : references/auto-selection.md Style Presets : references/style-presets.md Compatibility : references/compatibility.md Visual Elements : references/visual-elements.md Workflow : confirm-options.md | | : | |

Weekly Installs

115

Repository

freestylefly/ca…e-skills

GitHub Stars

182

First Seen

Feb 24, 2026

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