feat(baoyu-xhs-images): add screen-print style and style presets

Add screen-print as 11th visual style with poster aesthetic. Add --preset flag
for quick style + layout selection with 23 built-in presets (knowledge-card,
poster, cinematic, etc.). Update auto-selection and compatibility matrices.

skills/baoyu-xhs-images/references/elements/decorations.md

@@ -143,3 +143,10 @@ Pre-composed decorative elements.
 - Chalk dust effects
 - Hand-drawn doodles
 - Mathematical formulas, simple icons
+
+### Screen-Print Style
+- Bold silhouettes, geometric shapes
+- Halftone dot patterns, print grain
+- No doodles — negative space does the work
+- Stencil-cut edges, color block boundaries
+- Vintage poster border treatments

skills/baoyu-xhs-images/references/presets/screen-print.md

@@ -0,0 +1,92 @@
+---
+name: screen-print
+category: poster
+---
+
+# Screen-Print Style
+
+Bold poster art with halftone textures, limited colors, and symbolic storytelling.
+
+## Element Combination
+
+```yaml
+canvas:
+  ratio: portrait-3-4
+  grid: single | dual
+
+image_effects:
+  cutout: silhouette
+  stroke: none
+  filter: halftone | print-grain
+
+typography:
+  decorated: stroke-text | shadow-3d
+  tags: none
+  direction: horizontal
+
+decorations:
+  emphasis: star-burst | numbering
+  background: solid-saturated | paper-texture
+  doodles: none
+  frames: none
+```
+
+## Color Palette
+
+| Role | Colors | Hex |
+|------|--------|-----|
+| Primary | Burnt Orange, Deep Teal | #E8751A, #0A6E6E |
+| Background | Off-Black, Warm Cream | #121212, #F5E6D0 |
+| Accents | Crimson, Amber | #C0392B, #F4A623 |
+
+**Duotone Pairs** (choose ONE based on content mood):
+
+| Pair | Color A | Color B | Feel |
+|------|---------|---------|------|
+| Orange + Teal | #E8751A | #0A6E6E | Cinematic, action |
+| Red + Cream | #C0392B | #F5E6D0 | Bold, classic |
+| Blue + Gold | #1A3A5C | #D4A843 | Premium, prestigious |
+| Crimson + Navy | #DC143C | #0D1B2A | Dramatic, noir |
+| Magenta + Cyan | #C2185B | #00BCD4 | Vibrant, pop |
+
+**Rule**: Use 2-5 colors maximum. Fewer colors = stronger impact.
+
+## Visual Elements
+
+- Bold silhouettes and symbolic shapes
+- Halftone dot patterns within color fills
+- Slight color layer misregistration (print offset effect)
+- Geometric framing (circles, arches, triangles)
+- Figure-ground inversion (negative space tells secondary story)
+- Stencil-cut edges, no outlines — shapes defined by color boundaries
+- Typography integrated as design element, not overlay
+- Vintage poster border treatments
+
+## Typography
+
+- Bold condensed sans-serif or hand-drawn lettering
+- Art Deco influences, vintage poster typography
+- Typography as integral part of composition (not separate layer)
+- High contrast with background for readability
+
+## Best Layout Pairings
+
+| Layout | Compatibility | Use Case |
+|--------|---------------|----------|
+| sparse | ✓✓ | Iconic poster covers, dramatic statements |
+| balanced | ✓✓ | Editorial compositions, opinion pieces |
+| dense | ✗ | Too much info clashes with minimal poster aesthetic |
+| list | ✓ | Bold rankings, top picks |
+| comparison | ✓✓ | Duotone split compositions, before/after |
+| flow | ✓ | Cinematic progression, timelines |
+| mindmap | ✗ | Too complex for geometric poster style |
+| quadrant | ✓✓ | Strong geometric division, classification |
+
+## Best For
+
+- Opinion pieces, cultural commentary
+- Movie/music/book recommendations
+- Dramatic announcements
+- Before/after transformations
+- Bold editorial content
+- Event promotions

skills/baoyu-xhs-images/references/style-presets.md

@@ -0,0 +1,36 @@
+# Style Presets
+
+`--preset X` expands to a style + layout combination. Users can override either dimension.
+
+| --preset | Style | Layout |
+|----------|-------|--------|
+| `knowledge-card` | `notion` | `dense` |
+| `checklist` | `notion` | `list` |
+| `concept-map` | `notion` | `mindmap` |
+| `swot` | `notion` | `quadrant` |
+| `tutorial` | `chalkboard` | `flow` |
+| `classroom` | `chalkboard` | `balanced` |
+| `study-guide` | `study-notes` | `dense` |
+| `cute-share` | `cute` | `balanced` |
+| `girly` | `cute` | `sparse` |
+| `cozy-story` | `warm` | `balanced` |
+| `product-review` | `fresh` | `comparison` |
+| `nature-flow` | `fresh` | `flow` |
+| `warning` | `bold` | `list` |
+| `versus` | `bold` | `comparison` |
+| `clean-quote` | `minimal` | `sparse` |
+| `pro-summary` | `minimal` | `balanced` |
+| `retro-ranking` | `retro` | `list` |
+| `throwback` | `retro` | `balanced` |
+| `pop-facts` | `pop` | `list` |
+| `hype` | `pop` | `sparse` |
+| `poster` | `screen-print` | `sparse` |
+| `editorial` | `screen-print` | `balanced` |
+| `cinematic` | `screen-print` | `comparison` |
+
+## Override Examples
+
+- `--preset knowledge-card --style chalkboard` = chalkboard style with dense layout
+- `--preset poster --layout quadrant` = screen-print style with quadrant layout
+
+Explicit `--style`/`--layout` flags always override preset values.

skills/baoyu-xhs-images/references/workflows/prompt-assembly.md

@@ -77,6 +77,41 @@ Load from `presets/{style}.md` and extract key elements:
 {typography_style}
 ```
 
+### Screen-Print Style Override
+
+When `style: screen-print`, replace the standard Core Principles and Text Style sections with:
+
+```
+## Core Principles
+
+- Screen print / silkscreen poster art — flat color blocks, NO gradients
+- Bold silhouettes and symbolic shapes over detailed rendering
+- Negative space as active storytelling element
+- If content involves sensitive or copyrighted figures, create stylistically similar silhouettes
+- One iconic focal point per image — conceptual, not literal
+
+## Color Rules (CRITICAL)
+
+- **2-5 FLAT COLORS MAXIMUM** — fewer colors = stronger impact
+- Choose ONE duotone pair from preset as dominant palette
+- Halftone dot patterns for tonal variation (NOT gradients)
+- Slight color layer misregistration for print authenticity
+
+## Text Style (CRITICAL)
+
+- Bold condensed sans-serif or Art Deco influenced lettering
+- Typography INTEGRATED into composition as design element
+- High contrast with background, stencil-cut quality
+- **DO NOT use delicate, thin, or handwritten fonts**
+
+## Composition
+
+- Geometric framing: circles, arches, triangles
+- Figure-ground inversion where possible (negative space forms secondary image)
+- Stencil-cut edges between color blocks, no outlines
+- Paper grain texture beneath all colors
+```
+
 ## Layout Section Assembly
 
 Load from `elements/canvas.md` and extract relevant layout:
@@ -123,7 +158,18 @@ be legible but not distracting from the main content.
 
 ## Assembly Process
 
-### Step 1: Load Preset
+### Step 0: Resolve Style Preset (if `--preset` used)
+
+If user specified `--preset`, resolve to style + layout from `references/style-presets.md`:
+
+```python
+# e.g., --preset knowledge-card → style=notion, layout=dense
+style, layout = resolve_preset(preset_name)
+```
+
+Explicit `--style`/`--layout` flags override preset values.
+
+### Step 1: Load Style Definition
 
 ```python
 preset = load_preset(style_name)  # e.g., "notion"