Image Compressor Skill | Agent Skills

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.

Agent Skills: Image Compressor

Install this agent skill to your local

Skill Files