chore: release v1.91.0

- Add minimalist art style (clean line art, limited spot color, stick-figure characters)
- Add four-panel layout with 起承转合 structure
- Add four-panel preset combining minimalist + neutral + four-panel layout
- Make character sheet conditional (skip for simple presets like four-panel)
- Add --ref failure recovery: compress → retry → fall back to prompt-only

.claude-plugin/marketplace.json

@@ -6,7 +6,7 @@
   },
   "metadata": {
     "description": "Skills shared by Baoyu for improving daily work efficiency",
-    "version": "1.89.2"
+    "version": "1.91.0"
   },
   "plugins": [
     {

CHANGELOG.md

@@ -2,6 +2,11 @@
 
 English | [中文](./CHANGELOG.zh.md)
 
+## 1.90.1 - 2026-04-05
+
+### Fixes
+- `baoyu-post-to-wechat`: detect actual image format from buffer magic bytes to fix CDN content-type mismatches (e.g. WebP served for .png URLs); treat WebP as PNG-preferred for transparency handling
+
 ## 1.89.1 - 2026-04-01
 
 ### Features

CHANGELOG.zh.md

@@ -2,6 +2,11 @@
 
 [English](./CHANGELOG.md) | 中文
 
+## 1.90.1 - 2026-04-05
+
+### 修复
+- `baoyu-post-to-wechat`：通过 magic bytes 检测实际图片格式，修复 CDN 返回与 URL 扩展名不一致的 content-type 问题（如 .png URL 实际返回 WebP）；WebP 格式按 PNG 策略处理以保留透明度
+
 ## 1.89.1 - 2026-04-01
 
 ### 新功能

CLAUDE.md

@@ -1,6 +1,6 @@
 # CLAUDE.md
 
-Claude Code marketplace plugin providing AI-powered content generation skills. Version: **1.89.2**.
+Claude Code marketplace plugin providing AI-powered content generation skills. Version: **1.91.0**.
 
 ## Architecture
 

README.md

@@ -116,6 +116,10 @@ Xiaohongshu (RedNote) infographic series generator. Breaks down content into 1-1
 
 # Direct content input
 /baoyu-xhs-images 今日星座运势
+
+# Non-interactive (skip all confirmations, for scheduled tasks)
+/baoyu-xhs-images posts/ai-future/article.md --yes
+/baoyu-xhs-images posts/ai-future/article.md --yes --preset knowledge-card
 ```
 
 **Styles** (visual aesthetics): `cute` (default), `fresh`, `warm`, `bold`, `minimal`, `retro`, `pop`, `notion`, `chalkboard`

README.zh.md

@@ -116,6 +116,10 @@ clawhub install baoyu-markdown-to-html
 
 # 直接输入内容
 /baoyu-xhs-images 今日星座运势
+
+# 非交互模式（跳过所有确认，适用于定时任务）
+/baoyu-xhs-images posts/ai-future/article.md --yes
+/baoyu-xhs-images posts/ai-future/article.md --yes --preset knowledge-card
 ```
 
 **风格**（视觉美学）：`cute`（默认）、`fresh`、`warm`、`bold`、`minimal`、`retro`、`pop`、`notion`、`chalkboard`

package.json

@@ -15,5 +15,8 @@
     "turndown": "^7.2.2",
     "turndown-plugin-gfm": "^1.0.2",
     "tsx": "^4.20.5"
+  },
+  "dependencies": {
+    "pdf-lib": "^1.17.1"
   }
 }

skills/baoyu-comic/SKILL.md

@@ -29,9 +29,9 @@ Create original knowledge comics with flexible art style × tone combinations.
 
 | Option | Values | Description |
 |--------|--------|-------------|
-| `--art` | ligne-claire (default), manga, realistic, ink-brush, chalk | Art style / rendering technique |
+| `--art` | ligne-claire (default), manga, realistic, ink-brush, chalk, minimalist | Art style / rendering technique |
 | `--tone` | neutral (default), warm, dramatic, romantic, energetic, vintage, action | Mood / atmosphere |
-| `--layout` | standard (default), cinematic, dense, splash, mixed, webtoon | Panel arrangement |
+| `--layout` | standard (default), cinematic, dense, splash, mixed, webtoon, four-panel | Panel arrangement |
 | `--aspect` | 3:4 (default, portrait), 4:3 (landscape), 16:9 (widescreen) | Page aspect ratio |
 | `--lang` | auto (default), zh, en, ja, etc. | Output language |
 
@@ -55,6 +55,7 @@ Details: [references/partial-workflows.md](references/partial-workflows.md)
 | `realistic` | 写实 | Digital painting, realistic proportions, sophisticated |
 | `ink-brush` | 水墨 | Chinese brush strokes, ink wash effects |
 | `chalk` | 粉笔 | Chalkboard aesthetic, hand-drawn warmth |
+| `minimalist` | 极简 | Clean black line art, limited spot color, stick-figure characters |
 
 ### Tones (基调)
 
@@ -77,6 +78,8 @@ Presets with special rules beyond art+tone:
 | `--style ohmsha` | `--art manga --tone neutral` | Visual metaphors, NO talking heads, gadget reveals |
 | `--style wuxia` | `--art ink-brush --tone action` | Qi effects, combat visuals, atmospheric elements |
 | `--style shoujo` | `--art manga --tone romantic` | Decorative elements, eye details, romantic beats |
+| `--style concept-story` | `--art manga --tone warm` | Visual symbol system, growth arc, dialogue+action balance |
+| `--style four-panel` | `--art minimalist --tone neutral --layout four-panel` | 起承转合 4-panel structure, B&W + spot color, stick-figure characters |
 
 ### Compatibility Matrix
 
@@ -87,6 +90,7 @@ Presets with special rules beyond art+tone:
 | realistic | neutral, warm, dramatic, vintage | action | romantic, energetic |
 | ink-brush | neutral, dramatic, action, vintage | warm | romantic, energetic |
 | chalk | neutral, warm, energetic | vintage | dramatic, action, romantic |
+| minimalist | neutral | warm, energetic | dramatic, vintage, romantic, action |
 
 Details: [references/auto-selection.md](references/auto-selection.md)
 
@@ -101,6 +105,8 @@ Content signals determine default art + tone + layout (or preset):
 | Personal story, mentor | ligne-claire + warm |
 | Martial arts, wuxia | **wuxia** preset |
 | Romance, school life | **shoujo** preset |
+| Psychology, motivation, business narrative | **concept-story** preset |
+| Business allegory, fable, parable, short insight, 四格 | **four-panel** preset |
 | Biography, balanced | ligne-claire + neutral |
 
 **When preset is recommended**: Load `references/presets/{preset}.md` and apply all special rules.
@@ -172,9 +178,9 @@ Comic Progress:
 - [ ] Step 4: Review outline (conditional)
 - [ ] Step 5: Generate prompts
 - [ ] Step 6: Review prompts (conditional)
-- [ ] Step 7: Generate images ⚠️ CHARACTER REF REQUIRED
-  - [ ] 7.1 Generate character sheet FIRST → characters/characters.png
-  - [ ] 7.2 Generate pages WITH --ref characters/characters.png
+- [ ] Step 7: Generate images
+  - [ ] 7.1 Generate character sheet (if needed) → characters/characters.png
+  - [ ] 7.2 Generate pages (with --ref if character sheet exists)
 - [ ] Step 8: Merge to PDF
 - [ ] Step 9: Completion report
 ```
@@ -205,16 +211,24 @@ Analyze → [Check Existing?] → [Confirm: Style + Reviews] → Storyboard →
 | 4 | Review outline (if requested) | User approval |
 | 5 | Generate prompts | `prompts/*.md` |
 | 6 | Review prompts (if requested) | User approval |
-| **7.1** | **Generate character sheet FIRST** | `characters/characters.png` |
-| **7.2** | Generate pages **with character ref** | `*.png` files |
+| 7.1 | Generate character sheet (if needed) | `characters/characters.png` |
+| 7.2 | Generate pages (with character ref if available) | `*.png` files |
 | 8 | Merge to PDF | `{slug}.pdf` |
 | 9 | Completion report | Summary |
 
-### Step 7: Image Generation ⚠️ CRITICAL
+### Step 7: Image Generation
 
-**Character reference is MANDATORY for visual consistency.**
+**7.1 Generate character sheet (conditional)**:
 
-**7.1 Generate character sheet first**:
+Character sheet is recommended for multi-page comics with recurring characters, but **NOT required** for all presets:
+
+| Condition | Action |
+|-----------|--------|
+| Multi-page comic with detailed characters | Generate character sheet (recommended) |
+| Preset with simplified characters (e.g., four-panel minimalist) | Skip — prompt descriptions are sufficient |
+| Single-page comic | Skip unless characters are complex |
+
+**When generating character sheet**:
 - **Backup rule**: If `characters/characters.png` exists, rename to `characters/characters-backup-YYYYMMDD-HHMMSS.png`
 - Invoke an installed image generation skill such as `baoyu-imagine`
 - Read that skill's `SKILL.md` and follow its documented interface rather than calling its scripts directly
@@ -222,18 +236,25 @@ Analyze → [Check Existing?] → [Confirm: Style + Reviews] → Storyboard →
 - Save output to `characters/characters.png`
 - Use aspect ratio `4:3`
 
-**Compress character sheet** (recommended):
-Compress to reduce token usage when used as reference image:
+**Compress character sheet** (recommended when using as `--ref`):
 - Use available image compression skill (if any)
-- Or system tools: `pngquant`, `optipng`, `sips` (macOS)
-- **Keep PNG format**, lossless compression preferred
+- Or system tools: `sips -s format jpeg -s formatOptions 80 input.png --out output.jpg` (macOS)
+- Or: `pngquant --quality=65-80 input.png -o output.png`
+- Compression reduces API payload size and avoids `--ref` failures
 
-**7.2 Generate each page WITH character reference**:
+**7.2 Generate each page**:
 
-| Skill Capability | Strategy |
-|------------------|----------|
-| Supports `--ref` | Pass `characters/characters.png` with EVERY page |
-| No `--ref` support | Prepend character descriptions to EVERY prompt file |
+| Character Sheet | Skill Capability | Strategy |
+|-----------------|------------------|----------|
+| Exists | Supports `--ref` | Pass `characters/characters.png` with EVERY page |
+| Exists | No `--ref` support | Prepend character descriptions to EVERY prompt file |
+| Skipped | — | Prompt file contains all character descriptions inline |
+
+**`--ref` failure recovery**: If generation fails with `--ref`:
+1. **Compress**: Convert reference image to JPEG with reduced quality:
+   `sips -s format jpeg -s formatOptions 70 characters.png --out characters-compressed.jpg`
+2. **Retry** with compressed image as `--ref`
+3. **If still fails**: Fall back to generating WITHOUT `--ref` (prompt-only, character descriptions embedded in prompt text)
 
 **Backup rules for page generation**:
 - If prompt file exists: rename to `prompts/NN-{cover|page}-[slug]-backup-YYYYMMDD-HHMMSS.md`
@@ -241,8 +262,8 @@ Compress to reduce token usage when used as reference image:
 - Invoke the installed image generation skill for each page
 - Use `prompts/01-page-xxx.md` as the prompt-file input
 - Save output to `01-page-xxx.png`
-- Use aspect ratio `3:4`
-- If the chosen skill supports reference images, pass `characters/characters.png` as `--ref`
+- Use aspect ratio from storyboard (default `3:4`, preset may override)
+- If character sheet exists and skill supports reference images, pass as `--ref`
 
 **Full workflow details**: [references/workflow.md](references/workflow.md)
 
@@ -273,10 +294,10 @@ Schema: [references/config/preferences-schema.md](references/config/preferences-
 - [ohmsha-guide.md](references/ohmsha-guide.md) - Ohmsha manga specifics
 
 **Style Definitions**:
-- `references/art-styles/` - Art styles (ligne-claire, manga, realistic, ink-brush, chalk)
+- `references/art-styles/` - Art styles (ligne-claire, manga, realistic, ink-brush, chalk, minimalist)
 - `references/tones/` - Tones (neutral, warm, dramatic, romantic, energetic, vintage, action)
-- `references/presets/` - Presets with special rules (ohmsha, wuxia, shoujo)
-- `references/layouts/` - Layouts (standard, cinematic, dense, splash, mixed, webtoon)
+- `references/presets/` - Presets with special rules (ohmsha, wuxia, shoujo, concept-story, four-panel)
+- `references/layouts/` - Layouts (standard, cinematic, dense, splash, mixed, webtoon, four-panel)
 
 **Workflow**:
 - [workflow.md](references/workflow.md) - Full workflow details
@@ -306,6 +327,6 @@ Schema: [references/config/preferences-schema.md](references/config/preferences-
 - Maintain style consistency via session ID
 - **Step 2 confirmation required** - do not skip
 - **Steps 4/6 conditional** - only if user requested in Step 2
-- **Step 7.1 character sheet MUST be generated before pages** - ensures consistency
-- **Step 7.2 EVERY page MUST reference characters** - use `--ref` or embed descriptions
+- **Step 7.1 character sheet** - recommended for multi-page comics, optional for simple presets
+- **Step 7.2 character reference** - use `--ref` if sheet exists; compress/convert on failure; fall back to prompt-only
 - Watermark/language configured once in EXTEND.md

skills/baoyu-comic/references/art-styles/minimalist.md

@@ -0,0 +1,84 @@
+# minimalist
+
+极简画风 - Clean black line art, limited spot color, simplified stick-figure characters
+
+## Overview
+
+Minimalist cartoon illustration characterized by clean black line art on white background with very limited spot color for emphasis. Characters are simplified to near-stick-figure abstraction, focusing on gesture and concept rather than anatomical detail. Designed for business allegory, quick-read educational content, and concept illustration.
+
+## Line Work
+
+- Clean, uniform black lines (1.5-2px)
+- No hatching, cross-hatching, or shading techniques
+- Minimal detail — every line serves a purpose
+- Bold outlines for characters, thinner lines for props/labels
+- No decorative flourishes or ornamental lines
+
+## Character Design
+
+- Highly simplified, stick-figure-like business characters
+- Circle or oval heads with minimal facial features (dot eyes, simple line mouth)
+- Body as simple geometric shapes or line constructions
+- Distinguishing features through props only (tie, hat, briefcase, glasses)
+- No anatomical detail — expressive through posture and gesture
+- 4-5 head height proportions (squat, iconic)
+
+## Background Treatment
+
+- Mostly blank/white — negative space is a design element
+- Minimal environmental cues (a line for ground, simple desk outline)
+- Concept labels and text annotations replace detailed environments
+- Icons and symbols over realistic rendering
+- No perspective or spatial depth
+
+## Color Approach
+
+- Primarily black and white (90%+ of the image)
+- 1-2 spot accent colors for emphasis on key concepts
+- Accent color used sparingly: highlighting key objects, text labels, concept indicators
+- No gradients, no shading, no color fills on backgrounds
+- Color draws the eye to the most important element in each panel
+
+## Default Color Palette
+
+| Role | Color | Hex |
+|------|-------|-----|
+| Primary | Black ink | `#1A1A1A` |
+| Background | Clean white | `#FFFFFF` |
+| Accent 1 | Spot orange | `#FF6B35` |
+| Accent 2 | Spot blue (optional) | `#3182CE` |
+| Text labels | Dark gray | `#4A4A4A` |
+| Panel border | Medium gray | `#666666` |
+
+## Visual Elements
+
+- Text labels with accent-color backgrounds or underlines for key terms
+- Simple icons: arrows, circles, checkmarks, crosses
+- Concept highlight boxes with spot color
+- Minimal speech bubbles (simple oval or rectangle, thin black outline)
+- No sound effects, no motion lines, no screen tones
+
+## Quality Markers
+
+- ✓ Clean, purposeful line work with no unnecessary detail
+- ✓ 90%+ black-and-white with strategic spot color
+- ✓ Simplified characters readable at small sizes
+- ✓ Text labels integrated naturally into panels
+- ✓ Strong negative space usage
+- ✓ Every element serves the narrative point
+
+## Compatibility
+
+| Tone | Fit | Notes |
+|------|-----|-------|
+| neutral | ✓✓ | Ideal for business/educational content |
+| warm | ✓ | Works for gentle stories, slight warmth in accent |
+| energetic | ✓ | Works for punchy, high-energy content |
+| dramatic | ✗ | Style too stripped down for dramatic intensity |
+| vintage | ✗ | Minimalist aesthetic conflicts with aged/textured look |
+| romantic | ✗ | No capacity for decorative/soft elements |
+| action | ✗ | No dynamic line capability for speed/impact |
+
+## Best For
+
+Business allegory, management fables, short concept illustration, four-panel comic strips, quick-insight education, social media content

skills/baoyu-comic/references/auto-selection.md

@@ -11,10 +11,13 @@ Content signals determine default art + tone + layout (or preset).
 | Technical explanation, educational | manga | neutral | webtoon | **ohmsha** |
 | Pre-1950, classical, ancient | realistic | vintage | cinematic | - |
 | Personal story, mentor | ligne-claire | warm | standard | - |
+| Psychology, motivation, self-help, coaching | manga | warm | standard | **concept-story** |
+| Business narrative, management, leadership | manga | warm | standard | **concept-story** |
 | Conflict, breakthrough | (inherit) | dramatic | splash | - |
-| Wine, food, business, lifestyle | realistic | neutral | cinematic | - |
+| Wine, food, lifestyle | realistic | neutral | cinematic | - |
 | Martial arts, wuxia, xianxia | ink-brush | action | splash | **wuxia** |
 | Romance, love, school life | manga | romantic | standard | **shoujo** |
+| Business allegory, fable, parable, short insight, 四格 | minimalist | neutral | four-panel | **four-panel** |
 | Biography, balanced | ligne-claire | neutral | mixed | - |
 
 ## Preset Recommendation Rules
@@ -36,6 +39,16 @@ Content signals determine default art + tone + layout (or preset).
 - **Special rules**: Decorative elements, eye details, romantic beats
 - **Base**: manga + romantic + standard
 
+### concept-story
+- **Triggers**: Psychology, motivation, self-help, business narrative, management, leadership, personal growth, coaching, soft skills, abstract concept through story
+- **Special rules**: Visual symbol system, growth arc, dialogue+action balance, original characters
+- **Base**: manga + warm + standard
+
+### four-panel
+- **Triggers**: Business allegory, fable, parable, short insight, four-panel, 四格, 四格漫画, single-page comic, minimalist comic strip
+- **Special rules**: Strict 起承转合 4-panel structure, B&W + spot color, simplified stick-figure characters, single-page story
+- **Base**: minimalist + neutral + four-panel
+
 ## Compatibility Matrix
 
 Art Style × Tone combinations work best when matched appropriately:
@@ -47,6 +60,7 @@ Art Style × Tone combinations work best when matched appropriately:
 | realistic | neutral, warm, dramatic, vintage | action | romantic, energetic |
 | ink-brush | neutral, dramatic, action, vintage | warm | romantic, energetic |
 | chalk | neutral, warm, energetic | vintage | dramatic, action, romantic |
+| minimalist | neutral | warm, energetic | dramatic, vintage, romantic, action |
 
 **Note**: Art Style × Tone × Layout can be freely combined. Incompatible combinations work but may produce unexpected results.
 

skills/baoyu-comic/references/config/preferences-schema.md

@@ -16,9 +16,9 @@ watermark:
   content: ""
   position: bottom-right  # bottom-right|bottom-left|bottom-center|top-right
 
-preferred_art: null       # ligne-claire|manga|realistic|ink-brush|chalk
+preferred_art: null       # ligne-claire|manga|realistic|ink-brush|chalk|minimalist
 preferred_tone: null      # neutral|warm|dramatic|romantic|energetic|vintage|action
-preferred_layout: null    # standard|cinematic|dense|splash|mixed|webtoon
+preferred_layout: null    # standard|cinematic|dense|splash|mixed|webtoon|four-panel
 preferred_aspect: null    # 3:4|4:3|16:9
 
 language: null            # zh|en|ja|ko|auto
@@ -41,7 +41,7 @@ character_presets:
 | `watermark.enabled` | bool | false | Enable watermark |
 | `watermark.content` | string | "" | Watermark text (@username or custom) |
 | `watermark.position` | enum | bottom-right | Position on image |
-| `preferred_art` | string | null | Art style (ligne-claire, manga, realistic, ink-brush, chalk) |
+| `preferred_art` | string | null | Art style (ligne-claire, manga, realistic, ink-brush, chalk, minimalist) |
 | `preferred_tone` | string | null | Tone (neutral, warm, dramatic, romantic, energetic, vintage, action) |
 | `preferred_layout` | string | null | Layout preference or null |
 | `preferred_aspect` | string | null | Aspect ratio (3:4, 4:3, 16:9) |
@@ -57,6 +57,7 @@ character_presets:
 | `realistic` | 写实 | Digital painting, realistic proportions |
 | `ink-brush` | 水墨 | Chinese brush strokes, ink wash effects |
 | `chalk` | 粉笔 | Chalkboard aesthetic, hand-drawn warmth |
+| `minimalist` | 极简 | Clean black line art, limited spot color, stick-figure characters |
 
 ## Tone Options
 

skills/baoyu-comic/references/layouts/four-panel.md

@@ -0,0 +1,40 @@
+# four-panel
+
+四格漫画 - Strict 2×2 grid, single-page story
+
+## Panel Structure
+
+- **Panels per page**: 4 (exactly, no variation)
+- **Structure**: Strict 2×2 equal grid
+- **Gutters**: Consistent white space (8-10px), uniform on all sides
+
+## Grid Configuration
+
+- 2 columns × 2 rows, all panels identical size
+- Panel sizes: Exactly equal (each panel = 25% of content area)
+- Reading flow: Z-pattern — Panel 1 (top-left) → Panel 2 (top-right) → Panel 3 (bottom-left) → Panel 4 (bottom-right)
+
+## Narrative Structure
+
+Each panel serves a specific narrative role (起承转合 / kishōtenketsu):
+
+| Panel | Position | Role | Purpose |
+|-------|----------|------|---------|
+| 1 | Top-left | 起 Setup | Establish situation, introduce characters/problem |
+| 2 | Top-right | 承 Development | Build on setup, add complication or attempt |
+| 3 | Bottom-left | 转 Turn | Twist, key insight, or reversal — the pivotal moment |
+| 4 | Bottom-right | 合 Conclusion | Resolution, punchline, or takeaway |
+
+## Aspect Ratio
+
+- Recommended page aspect: **4:3** (landscape)
+- Landscape gives each panel a comfortable wide rectangle
+- Portrait (3:4) makes panels tall and narrow — avoid for this layout
+
+## Best For
+
+Business allegory, quick-insight education, social media comics, fables, parables, single-concept explanation
+
+## Best Style Pairings
+
+minimalist, ligne-claire, chalk

skills/baoyu-comic/references/presets/concept-story.md

@@ -0,0 +1,121 @@
+# concept-story
+
+概念故事预设 - Narrative comics that visualize abstract concepts through character-driven stories
+
+## Base Configuration
+
+| Dimension | Value |
+|-----------|-------|
+| Art Style | manga |
+| Tone | warm |
+| Layout | standard (default) |
+
+Equivalent to: `--art manga --tone warm`
+
+## Unique Rules
+
+This preset includes special rules beyond the art+tone combination. When `--style concept-story` is used, ALL rules below must be applied.
+
+### Concept Visualization System (CRITICAL)
+
+Each major abstract concept SHOULD have a recurring visual symbol/metaphor:
+
+| Concept Type | Visualization Approach |
+|-------------|----------------------|
+| Psychological need | Tangible object character holds or discovers (e.g., glowing energy ball = competence) |
+| Management principle | Environmental metaphor character navigates (e.g., ship wheel = autonomy) |
+| Growth/development | Living organic symbol that transforms (e.g., seed → flowering plant = relatedness) |
+| Abstract framework | Spatial structure characters can enter or observe |
+| Emotional state | Color/lighting shift in the scene atmosphere |
+
+**Unlike ohmsha**: Dialogue panels are allowed and expected. The goal is to COMBINE visual metaphors WITH dialogue, not replace dialogue entirely.
+
+**Pattern**: "Dialogue introduces idea" → "Visual metaphor illustrates it" → "Character reacts/applies it"
+
+### Visual Symbol Continuity
+
+Symbols must persist across the story:
+
+| Stage | Treatment |
+|-------|-----------|
+| Introduction | Symbol appears with soft glow effect when concept is first mentioned |
+| Recurrence | Same symbol reappears in background or character interaction when concept is referenced |
+| Resolution | ALL symbols gather in the final composition, showing integration of learned concepts |
+
+**Storyboard requirement**: Include a Symbol Mapping Table defining concept → visual symbol before panel breakdown.
+
+### Character Archetypes (Flexible)
+
+Create original characters based on content domain. No fixed defaults:
+
+| Role | Archetype | Visual Cues |
+|------|-----------|------------|
+| Protagonist | Learner/worker facing a challenge | Modern professional or student, relatable, starts with constrained posture |
+| Mentor | Experienced guide who teaches through experience | Slightly older, calm demeanor, warm color accents |
+| Catalyst | Person or event that triggers transformation | Can be a colleague, situation, challenge, or opportunity |
+
+**IMPORTANT**: Characters are created fresh each time based on the source content's domain (business, psychology, education, etc.). No default character set.
+
+### Narrative Arc Structure
+
+Enforce a five-stage growth arc:
+
+| Act | Structure | Visual Tone |
+|-----|-----------|------------|
+| Opening | Protagonist stuck in routine, faces frustration | Muted warm tones, tight framing, constrained compositions |
+| Inciting moment | Mentor appears or opportunity arrives | Brightness increases, panels open up |
+| Learning | Concepts introduced through visual metaphors | Rich warm palette, symbols introduced one by one |
+| Turning point | Protagonist applies knowledge, faces test | Contrast increases, dynamic compositions |
+| Transformation | Growth demonstrated, new understanding visible | Full warm palette, expansive composition, all symbols present |
+
+### Dialogue + Action Balance
+
+- Dialogue is encouraged and expected (unlike ohmsha's NO talking heads rule)
+- Every page should combine at least one dialogue panel with at least one visual/action panel
+- Avoid pure "lecture" pages where a character explains for 4+ panels straight
+- When a character explains a concept verbally, the NEXT panel should visualize it
+
+**Wrong approach**: Four consecutive panels of mentor lecturing at protagonist
+**Right approach**: Mentor introduces concept → visual metaphor panel → protagonist reacts → applies understanding
+
+### Scene Atmosphere Rules
+
+| Scene Type | Atmosphere |
+|------------|-----------|
+| Problem/frustration | Cool muted tones over warm base, tight framing, cluttered environment |
+| Mentoring moment | Golden hour lighting, open composition, warm indoor glow |
+| Concept visualization | Soft glow effects, clean simplified backgrounds, symbol spotlight |
+| Growth/transformation | Warm light expanding outward, character posture opening up |
+| Resolution | Full warm palette, spacious composition, all visual symbols visible |
+
+### Ending Requirements
+
+Final page MUST include:
+
+1. Protagonist demonstrating transformed understanding (not just being told)
+2. Visual callback showing contrast with opening state (e.g., wilted plant → thriving plant)
+3. All concept symbols visible together in the composition
+4. A forward-looking element suggesting ongoing growth (not a closed ending)
+
+### Page Title Convention
+
+Every page MUST have a narrative title:
+
+**Wrong**: "Chapter 3: Self-Determination Theory"
+**Right**: "The Day Xiao Ming Found His Own Engine"
+
+## Quality Markers
+
+- ✓ Each major concept has a recurring visual symbol
+- ✓ Dialogue and visual metaphors work together (not one replacing the other)
+- ✓ Clear growth arc from problem to transformation
+- ✓ Original characters suited to the content domain
+- ✓ Warm, professional atmosphere throughout
+- ✓ Visual symbols recur and accumulate through the story
+- ✓ Final page integrates all concept symbols with transformation callback
+
+## Best For
+
+Psychology concepts, business/management principles, motivation theory, personal development,
+self-help content, leadership frameworks, coaching narratives, soft skill education,
+abstract concept explanation through character-driven stories

skills/baoyu-comic/references/presets/four-panel.md

@@ -0,0 +1,107 @@
+# four-panel
+
+四格漫画预设 - Minimalist four-panel business allegory comics
+
+## Base Configuration
+
+| Dimension | Value |
+|-----------|-------|
+| Art Style | minimalist |
+| Tone | neutral |
+| Layout | four-panel (default) |
+| Aspect | 4:3 (landscape) |
+
+Equivalent to: `--art minimalist --tone neutral --layout four-panel --aspect 4:3`
+
+## Unique Rules
+
+This preset includes special rules beyond the art+tone combination. When `--style four-panel` is used, ALL rules below must be applied.
+
+### 起承转合 Narrative Structure (CRITICAL)
+
+Every comic MUST follow the four-panel 起承转合 structure:
+
+| Panel | Role | Requirements |
+|-------|------|-------------|
+| 1 (起 Setup) | Introduce the situation | Show character(s) in a recognizable context. Establish the "normal" state or problem |
+| 2 (承 Development) | Build on the setup | Add complication, show an attempt, or introduce the concept. Stakes become clearer |
+| 3 (转 Turn) | The twist or key insight | **Most important panel.** Show the unexpected reversal, contrast, or "aha" moment that makes the allegory work |
+| 4 (合 Conclusion) | Resolution and takeaway | Show the result, consequence, or lesson learned. Can be a visual punchline or summary |
+
+**CRITICAL**: Do NOT deviate from exactly 4 panels. No 5th panel, no title panel, no footer panel within the image.
+
+### Single-Page Story Rule (CRITICAL)
+
+- The entire story is told in ONE page with exactly 4 panels
+- Page count: always 1 (plus optional cover)
+- No multi-page four-panel stories — if content requires more, create multiple separate four-panel comics
+- Storyboard structure: Cover (optional) + 1 page
+
+### Accent Color System
+
+- The image is primarily black-and-white line art
+- Use exactly 1-2 spot colors per strip (default: orange `#FF6B35`)
+- Rules:
+  - Key concept label or object: filled with accent color or outlined in accent
+  - Panel 3 (转 Turn) should have the strongest color emphasis
+  - Characters remain B&W — color is for concepts/objects/labels only
+  - Consistent accent color across all 4 panels (do not switch colors between panels)
+
+### Character Design Rules
+
+- Simplified stick-figure-like characters
+- Distinguish characters through simple props: ties, glasses, hats, briefcases, aprons
+- No detailed faces — dot eyes, line mouth at most
+- Characters should be generic enough to represent archetypes (the manager, the employee, the customer)
+- Maximum 2-3 characters per strip
+
+### Text in Panels
+
+- Chinese text for dialogue and labels (or match source language)
+- Keep text minimal — 1-2 short lines per panel maximum
+- Key concept terms can be highlighted with accent color background
+- No narrator boxes — dialogue and labels only
+- Speech bubbles: simple rectangles or ovals, thin black outline
+
+### Optional Title & Caption
+
+- A brief descriptive title above the 4 panels
+- An optional one-line caption/moral below the panels
+- These are part of the page composition, not separate panels
+
+### Character Archetypes (Flexible)
+
+Create simple stick-figure characters based on content. No fixed defaults:
+
+| Role | Archetype | Visual Cues |
+|------|-----------|------------|
+| Protagonist | Worker/employee facing a situation | Simple figure, minimal distinguishing feature (glasses, tie) |
+| Authority | Boss/manager/expert | Slightly larger figure, or prop like pointer/clipboard |
+| Object | The concept itself | Labeled object, icon, or highlighted text with accent color |
+
+### Prompt Template
+
+When generating image prompts for four-panel comics, include these keywords:
+
+> A minimalist, clean line art digital comic strip in a four-panel grid layout (2×2). The style is simplified cartoon illustration with clear black outlines and a minimal color palette of black, white, and specific spot [accent color] for key concepts.
+
+Each panel description should specify:
+- Panel position (Top Left / Top Right / Bottom Left / Bottom Right)
+- Character poses and gestures (simple, stick-figure style)
+- Dialogue text in Chinese (hand-drawn style)
+- Any accent-colored elements (concept labels, key objects)
+
+## Quality Markers
+
+- ✓ Exactly 4 panels in strict 2×2 grid
+- ✓ 起承转合 narrative arc clearly present
+- ✓ 90%+ black-and-white with strategic spot color
+- ✓ Simplified stick-figure characters
+- ✓ Key concept visually highlighted with accent color
+- ✓ Text is minimal and in Chinese (or source language)
+- ✓ Single complete story in one page
+- ✓ Panel 3 delivers a clear "turn" or insight
+
+## Best For
+
+Business allegory, management fables, short insights, workplace parables, concept contrasts, social media educational content, quick-read comics

skills/baoyu-comic/references/workflow.md

@@ -18,6 +18,8 @@ Comic Progress:
 - [ ] Step 5: Generate prompts
 - [ ] Step 6: Review prompts (conditional)
 - [ ] Step 7: Generate images
+  - [ ] 7.1 Character sheet (if needed)
+  - [ ] 7.2 Generate pages
 - [ ] Step 8: Merge to PDF
 - [ ] Step 9: Completion report
 ```
@@ -410,28 +412,41 @@ options:
 
 With confirmed prompts from Step 5/6:
 
-### 7.1 Generate Character Reference Sheet (first)
+### 7.1 Generate Character Reference Sheet (conditional)
 
+Character sheet is recommended for multi-page comics with recurring characters, but **NOT required** for all presets.
+
+**When to generate**:
+
+| Condition | Action |
+|-----------|--------|
+| Multi-page comic with detailed/recurring characters | Generate character sheet (recommended) |
+| Preset with simplified characters (e.g., four-panel minimalist) | Skip — prompt descriptions are sufficient |
+| Single-page comic | Skip unless characters are complex |
+
+**When generating**:
 1. Use Reference Sheet Prompt from `characters/characters.md`
 2. **Backup rule**: If `characters/characters.png` exists, rename to `characters/characters-backup-YYYYMMDD-HHMMSS.png`
 3. Generate → `characters/characters.png`
-4. This ensures visual consistency for all subsequent pages
+4. **Compress** to reduce API payload size when used as `--ref`:
+   - `sips -s format jpeg -s formatOptions 80 characters.png --out characters-compressed.jpg` (macOS)
+   - Or: `pngquant --quality=65-80 characters.png -o characters-compressed.png`
 
 ### 7.2 Generate Comic Pages
 
-**CRITICAL: Character Reference is MANDATORY** for visual consistency across all pages.
-
 **Before generating any page**:
 1. Read the image generation skill's SKILL.md
 2. Check if it supports reference image input (`--ref`, `--reference`, etc.)
-3. Choose the appropriate strategy below
+3. Determine if character sheet exists
+4. Choose the appropriate strategy below
 
-**Character Reference Strategy**:
+**Page Generation Strategy**:
 
-| Skill Capability | Strategy | Action |
-|------------------|----------|--------|
-| Supports `--ref` | **Strategy A** | Pass `characters/characters.png` with EVERY page |
-| Does NOT support `--ref` | **Strategy B** | Prepend character descriptions to EVERY prompt |
+| Character Sheet | Skill Capability | Strategy |
+|-----------------|------------------|----------|
+| Exists | Supports `--ref` | **A**: Pass character sheet as `--ref` with every page |
+| Exists | No `--ref` support | **B**: Embed character descriptions in every prompt |
+| Skipped | — | **C**: Prompt file contains all descriptions inline |
 
 **Strategy A: Using `--ref` parameter** (e.g., baoyu-imagine)
 
@@ -439,8 +454,16 @@ With confirmed prompts from Step 5/6:
 - Invoke that installed skill via its documented interface, not by calling its scripts directly
 - For every page, use `prompts/01-page-xxx.md` as the prompt-file input
 - Save output to `01-page-xxx.png`
-- Use aspect ratio `3:4`
-- Pass `characters/characters.png` as `--ref` on every page generation
+- Use aspect ratio from storyboard (default `3:4`, preset may override)
+- Pass `characters/characters.png` (or compressed version) as `--ref`
+
+**`--ref` failure recovery**:
+If generation fails when using `--ref`:
+1. **Compress/convert** reference image:
+   - `sips -s format jpeg -s formatOptions 70 characters.png --out characters-compressed.jpg`
+   - Or reduce resolution: `sips -Z 1024 characters.png --out characters-small.png`
+2. **Retry** with compressed/converted image as `--ref`
+3. **If still fails**: Fall back to **Strategy C** — generate WITHOUT `--ref`, with character descriptions embedded in prompt text
 
 **Strategy B: Embedding character descriptions in prompt**
 
@@ -458,10 +481,17 @@ When skill does NOT support reference images, create combined prompt files:
 [Original page prompt here]
 ```
 
+**Strategy C: Prompt-only (no character sheet)**
+
+When character sheet was skipped or `--ref` failed:
+- Prompt file already contains all character descriptions inline
+- No `--ref` parameter needed
+- Rely on detailed text descriptions for character consistency
+
 **For each page (cover + pages)**:
 1. Read prompt from `prompts/NN-{cover|page}-[slug].md`
 2. **Backup rule**: If image file exists, rename to `NN-{cover|page}-[slug]-backup-YYYYMMDD-HHMMSS.png`
-3. Generate image using Strategy A or B (based on skill capability)
+3. Generate image using Strategy A, B, or C
 4. Save to `NN-{cover|page}-[slug].png`
 5. Report progress after each generation: "Generated X/N: [page title]"
 
@@ -493,7 +523,7 @@ Title: [title] | Art: [art] | Tone: [tone] | Pages: [count] | Aspect: [ratio] |
 Watermark: [enabled/disabled]
 Location: [path]
 ✓ analysis.md
-✓ characters.png
+✓ characters.png (if generated)
 ✓ 00-cover-[slug].png ... NN-page-[slug].png
 ✓ {topic-slug}.pdf
 ```

skills/baoyu-post-to-wechat/scripts/wechat-api.ts

@@ -7,6 +7,7 @@ import {
   type WechatUploadAsset,
   prepareWechatBodyImageUpload,
   needsWechatBodyImageProcessing,
+  detectImageFormatFromBuffer,
 } from "./wechat-image-processor.ts";
 
 interface AccessTokenResponse {
@@ -138,6 +139,16 @@ async function loadUploadAsset(
     contentType = mimeTypes[fileExt] || "image/jpeg";
   }
 
+  // Detect actual format from magic bytes to fix extension/content-type mismatches
+  // (e.g. CDNs serving WebP for URLs with .png extension)
+  const detected = detectImageFormatFromBuffer(fileBuffer);
+  if (detected && detected.contentType !== contentType) {
+    console.error(`[wechat-api] Format mismatch: ${filename} declared as ${contentType}, actual ${detected.contentType}`);
+    contentType = detected.contentType;
+    fileExt = detected.fileExt;
+    filename = `${path.basename(filename, path.extname(filename))}${detected.fileExt}`;
+  }
+
   return {
     buffer: fileBuffer,
     filename,

skills/baoyu-post-to-wechat/scripts/wechat-image-processor.ts

@@ -52,6 +52,39 @@ const MIME_TO_EXT: Record<string, string> = {
 const JPEG_QUALITY_STEPS = [82, 74, 66, 58, 50, 42, 34];
 const MAX_WIDTH_STEPS = [2560, 2048, 1600, 1280, 1024, 800, 640, 480];
 
+/**
+ * Detect actual image format from buffer magic bytes.
+ * Returns corrected { contentType, fileExt } or null if unknown.
+ */
+export function detectImageFormatFromBuffer(buffer: Buffer): { contentType: string; fileExt: string } | null {
+  if (buffer.length < 12) return null;
+
+  // WebP: RIFF....WEBP
+  if (
+    buffer[0] === 0x52 && buffer[1] === 0x49 && buffer[2] === 0x46 && buffer[3] === 0x46 &&
+    buffer[8] === 0x57 && buffer[9] === 0x45 && buffer[10] === 0x42 && buffer[11] === 0x50
+  ) {
+    return { contentType: "image/webp", fileExt: ".webp" };
+  }
+  // PNG: 89 50 4E 47
+  if (buffer[0] === 0x89 && buffer[1] === 0x50 && buffer[2] === 0x4e && buffer[3] === 0x47) {
+    return { contentType: "image/png", fileExt: ".png" };
+  }
+  // JPEG: FF D8 FF
+  if (buffer[0] === 0xff && buffer[1] === 0xd8 && buffer[2] === 0xff) {
+    return { contentType: "image/jpeg", fileExt: ".jpg" };
+  }
+  // GIF: GIF8
+  if (buffer[0] === 0x47 && buffer[1] === 0x49 && buffer[2] === 0x46 && buffer[3] === 0x38) {
+    return { contentType: "image/gif", fileExt: ".gif" };
+  }
+  // BMP: BM
+  if (buffer[0] === 0x42 && buffer[1] === 0x4d) {
+    return { contentType: "image/bmp", fileExt: ".bmp" };
+  }
+  return null;
+}
+
 let webpDecoderReady: Promise<void> | undefined;
 
 type JimpImage = Awaited<ReturnType<typeof Jimp.read>>;
@@ -209,7 +242,8 @@ export async function prepareWechatBodyImageUpload(
 
   const image = await loadImageForProcessing(asset);
   const widths = buildCandidateWidths(image.bitmap.width);
-  const preferPng = imageHasTransparency(image) || ensureFileExt(asset) === ".png";
+  const ext = ensureFileExt(asset);
+  const preferPng = imageHasTransparency(image) || ext === ".png" || ext === ".webp";
   const processingNotes = buildProcessingNotes(asset);
 
   for (const width of widths) {

skills/baoyu-xhs-images/SKILL.md

@@ -39,6 +39,10 @@ Break down complex content into eye-catching infographic series for Xiaohongshu
 # Direct input with options
 /baoyu-xhs-images --style bold --layout comparison
 [paste content]
+
+# Non-interactive (for scheduled tasks / automation)
+/baoyu-xhs-images posts/ai-future/article.md --yes
+/baoyu-xhs-images posts/ai-future/article.md --yes --preset knowledge-card
 ```
 
 ## Options
@@ -48,6 +52,7 @@ Break down complex content into eye-catching infographic series for Xiaohongshu
 | `--style <name>` | Visual style (see Style Gallery) |
 | `--layout <name>` | Information layout (see Layout Gallery) |
 | `--preset <name>` | Style + layout shorthand (see [Style Presets](references/style-presets.md)) |
+| `--yes` | Non-interactive mode: skip all confirmations. Uses EXTEND.md preferences if found, otherwise uses defaults (no watermark, auto style/layout). Auto-confirms recommended plan (Path A). Suitable for scheduled tasks and automation. |
 
 ## Two Dimensions
 
@@ -237,11 +242,11 @@ Copy and track progress:
 
 ```
 XHS Infographic Progress:
-- [ ] Step 0: Check preferences (EXTEND.md) ⛔ BLOCKING
+- [ ] Step 0: Check preferences (EXTEND.md) ⛔ BLOCKING (--yes: use defaults if not found)
   - [ ] Found → load preferences → continue
-  - [ ] Not found → run first-time setup → MUST complete before Step 1
+  - [ ] Not found → run first-time setup → MUST complete before Step 1 (--yes: skip setup, use defaults)
 - [ ] Step 1: Analyze content → analysis.md
-- [ ] Step 2: Smart Confirm ⚠️ REQUIRED
+- [ ] Step 2: Smart Confirm ⚠️ REQUIRED (--yes: auto-confirm Path A)
   - [ ] Path A: Quick confirm → generate recommended outline
   - [ ] Path B: Customize → adjust then generate outline
   - [ ] Path C: Detailed → 3 outlines → second confirm → generate outline
@@ -252,26 +257,30 @@ XHS Infographic Progress:
 ### Flow
 
 ```
-Input → [Step 0: Preferences] ─┬─ Found → Continue
-                               │
-                               └─ Not found → First-Time Setup ⛔ BLOCKING
-                                              │
-                                              └─ Complete setup → Save EXTEND.md → Continue
-                                                                                      │
-        ┌───────────────────────────────────────────────────────────────────────────┘
-        ↓
-Analyze → [Smart Confirm] ─┬─ Quick: confirm recommended → outline.md → Generate → Complete
-                           │
-                           ├─ Customize: adjust options → outline.md → Generate → Complete
-                           │
-                           └─ Detailed: 3 outlines → [Confirm 2] → outline.md → Generate → Complete
+Input → [--yes?] ─┬─ Yes → [Step 0: Load or defaults] → Analyze → Auto-confirm → Generate → Complete
+                   │
+                   └─ No → [Step 0: Preferences] ─┬─ Found → Continue
+                                                   │
+                                                   └─ Not found → First-Time Setup ⛔ BLOCKING
+                                                                  │
+                                                                  └─ Complete setup → Save EXTEND.md → Continue
+                                                                                                          │
+                    ┌─────────────────────────────────────────────────────────────────────────────────────┘
+                    ↓
+            Analyze → [Smart Confirm] ─┬─ Quick: confirm recommended → outline.md → Generate → Complete
+                                       │
+                                       ├─ Customize: adjust options → outline.md → Generate → Complete
+                                       │
+                                       └─ Detailed: 3 outlines → [Confirm 2] → outline.md → Generate → Complete
 ```
 
 ### Step 0: Load Preferences (EXTEND.md) ⛔ BLOCKING
 
 **Purpose**: Load user preferences or run first-time setup.
 
-**CRITICAL**: If EXTEND.md not found, MUST complete first-time setup before ANY other questions or steps. Do NOT proceed to content analysis, do NOT ask about style, do NOT ask about layout — ONLY complete the preferences setup first.
+**`--yes` mode**: If EXTEND.md found → load it. If not found → use built-in defaults (no watermark, style/layout auto-select, language from content). Do NOT run first-time setup, do NOT create EXTEND.md, do NOT ask any questions. Proceed directly to Step 1.
+
+**CRITICAL** (interactive mode only): If EXTEND.md not found, MUST complete first-time setup before ANY other questions or steps. Do NOT proceed to content analysis, do NOT ask about style, do NOT ask about layout — ONLY complete the preferences setup first.
 
 Check EXTEND.md existence (priority order):
 
@@ -340,7 +349,11 @@ Read source content, save it if needed, and perform deep analysis.
 
 ### Step 2: Smart Confirm ⚠️
 
-**Purpose**: Present auto-recommended plan, let user confirm or adjust. **Do NOT skip.**
+**Purpose**: Present auto-recommended plan, let user confirm or adjust.
+
+**`--yes` mode**: Skip this entire step. Use auto-recommended strategy + style + layout from Step 1 analysis (or `--style`/`--layout`/`--preset` if provided). Generate outline directly using Path A logic → save to `outline.md` → proceed to Step 3. No AskUserQuestion calls.
+
+**Interactive mode**: Do NOT skip.
 
 **Auto-Recommendation Logic**:
 1. Use Auto Selection table to match content signals → best strategy + style + layout
@@ -491,7 +504,7 @@ Reference: `references/config/watermark-guide.md`
 
 **Image Generation Skill Selection**:
 - Check available image generation skills
-- If multiple skills available, ask user preference
+- If multiple skills available: ask user preference (interactive) or use first available skill (`--yes` mode)
 
 **Session Management**:
 If image generation skill supports `--sessionId`: