Add baoyu-skills package

baoyu-skills/skills/baoyu-article-illustrator/references/usage.md

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+# Usage
+
+## Command Syntax
+
+```bash
+# Auto-select type and style based on content
+/baoyu-article-illustrator path/to/article.md
+
+# Specify type
+/baoyu-article-illustrator path/to/article.md --type infographic
+
+# Specify style
+/baoyu-article-illustrator path/to/article.md --style blueprint
+
+# Combine type and style
+/baoyu-article-illustrator path/to/article.md --type flowchart --style notion
+
+# Specify density
+/baoyu-article-illustrator path/to/article.md --density rich
+
+# Generate up to 4 images in parallel after prompts are saved
+/baoyu-article-illustrator path/to/article.md --batch-size 4
+
+# Direct content input (paste mode)
+/baoyu-article-illustrator
+[paste content]
+```
+
+## Options
+
+| Option | Description |
+|--------|-------------|
+| `--type <name>` | Illustration type (see Type Gallery in SKILL.md) |
+| `--style <name>` | Visual style (see references/styles.md) |
+| `--preset <name>` | Shorthand for type + style combo (see [references/style-presets.md](references/style-presets.md)) |
+| `--density <level>` | Image count: minimal / balanced / rich |
+| `--batch-size <n>` | Temporary generation batch size for this run. Default: `generation_batch_size` from EXTEND.md, otherwise 4. Clamp to 1-8. |
+
+## Input Modes
+
+| Mode | Trigger | Output Directory |
+|------|---------|------------------|
+| File path | `path/to/article.md` | Use `default_output_dir` preference, or ask if not set |
+| Paste content | No path argument | `illustrations/{topic-slug}/` |
+
+## Output Directory Options
+
+| Value | Path |
+|-------|------|
+| `same-dir` | `{article-dir}/` |
+| `illustrations-subdir` | `{article-dir}/illustrations/` |
+| `independent` | `illustrations/{topic-slug}/` |
+
+Configure in EXTEND.md: `default_output_dir: illustrations-subdir`
+
+## Examples
+
+**Technical article with data**:
+```bash
+/baoyu-article-illustrator api-design.md --type infographic --style blueprint
+```
+
+**Same thing with preset**:
+```bash
+/baoyu-article-illustrator api-design.md --preset tech-explainer
+```
+
+**Personal story**:
+```bash
+/baoyu-article-illustrator journey.md --preset storytelling
+```
+
+**Tutorial with steps**:
+```bash
+/baoyu-article-illustrator how-to-deploy.md --preset tutorial --density rich
+```
+
+**Opinion article with poster style**:
+```bash
+/baoyu-article-illustrator opinion.md --preset opinion-piece
+```
+
+**Preset with override**:
+```bash
+/baoyu-article-illustrator article.md --preset tech-explainer --style notion
+```