Agent skill
baoyu-compress-image
Compresses images to WebP (default) or PNG with automatic tool selection. Use when user asks to "compress image", "optimize image", "convert to webp", or reduce image file size.
Install this agent skill to your Project
npx add-skill https://github.com/zephyrwang6/myskill/tree/main/baoyu-compress-image
SKILL.md
Image Compressor
Compresses images using best available tool (sips → cwebp → ImageMagick → Sharp).
Script Directory
Scripts in scripts/ subdirectory. Replace ${SKILL_DIR} with this SKILL.md's directory path.
| Script | Purpose |
|---|---|
scripts/main.ts |
Image compression CLI |
Preferences (EXTEND.md)
Use Bash to check EXTEND.md existence (priority order):
# Check project-level first
test -f .baoyu-skills/baoyu-compress-image/EXTEND.md && echo "project"
# Then user-level (cross-platform: $HOME works on macOS/Linux/WSL)
test -f "$HOME/.baoyu-skills/baoyu-compress-image/EXTEND.md" && echo "user"
┌────────────────────────────────────────────────────────┬───────────────────┐ │ Path │ Location │ ├────────────────────────────────────────────────────────┼───────────────────┤ │ .baoyu-skills/baoyu-compress-image/EXTEND.md │ Project directory │ ├────────────────────────────────────────────────────────┼───────────────────┤ │ $HOME/.baoyu-skills/baoyu-compress-image/EXTEND.md │ User home │ └────────────────────────────────────────────────────────┴───────────────────┘
┌───────────┬───────────────────────────────────────────────────────────────────────────┐ │ Result │ Action │ ├───────────┼───────────────────────────────────────────────────────────────────────────┤ │ Found │ Read, parse, apply settings │ ├───────────┼───────────────────────────────────────────────────────────────────────────┤ │ Not found │ Use defaults │ └───────────┴───────────────────────────────────────────────────────────────────────────┘
EXTEND.md Supports: Default format | Default quality | Keep original preference
Usage
npx -y bun ${SKILL_DIR}/scripts/main.ts <input> [options]
Options
| Option | Short | Description | Default |
|---|---|---|---|
<input> |
File or directory | Required | |
--output |
-o |
Output path | Same path, new ext |
--format |
-f |
webp, png, jpeg | webp |
--quality |
-q |
Quality 0-100 | 80 |
--keep |
-k |
Keep original | false |
--recursive |
-r |
Process subdirs | false |
--json |
JSON output | false |
Examples
# Single file → WebP (replaces original)
npx -y bun ${SKILL_DIR}/scripts/main.ts image.png
# Keep PNG format
npx -y bun ${SKILL_DIR}/scripts/main.ts image.png -f png --keep
# Directory recursive
npx -y bun ${SKILL_DIR}/scripts/main.ts ./images/ -r -q 75
# JSON output
npx -y bun ${SKILL_DIR}/scripts/main.ts image.png --json
Output:
image.png → image.webp (245KB → 89KB, 64% reduction)
Extension Support
Custom configurations via EXTEND.md. See Preferences section for paths and supported options.
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