Marketplace baoyu-compress-image

Cross-platform image compression skill. Converts images to WebP by default with PNG-to-PNG support. Uses system tools (sips, cwebp, ImageMagick) with Sharp fallback.

install

source · Clone the upstream repo

git clone https://github.com/aiskillstore/marketplace

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/aiskillstore/marketplace "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/jimliu/baoyu-compress-image" ~/.claude/skills/aiskillstore-marketplace-baoyu-compress-image && rm -rf "$T"

manifest: skills/jimliu/baoyu-compress-image/SKILL.md

source content

Image Compressor

Cross-platform image compression with WebP default output, PNG-to-PNG support, preferring system tools with Sharp fallback.

Script Directory

Important: All scripts are located in the

scripts/

subdirectory of this skill.

Agent Execution Instructions:

Determine this SKILL.md file's directory path as
```
SKILL_DIR
```
Script path =
```
${SKILL_DIR}/scripts/<script-name>.ts
```
Replace all
```
${SKILL_DIR}
```
in this document with the actual path

Script Reference:

Script	Purpose
`scripts/main.ts`	CLI entry point for image compression

Quick Start

# Compress to WebP (default)
npx -y bun ${SKILL_DIR}/scripts/main.ts image.png

# Keep original format (PNG → PNG)
npx -y bun ${SKILL_DIR}/scripts/main.ts image.png --format png

# Custom quality
npx -y bun ${SKILL_DIR}/scripts/main.ts image.png -q 75

# Process directory
npx -y bun ${SKILL_DIR}/scripts/main.ts ./images/ -r

Commands

Single File Compression

# Basic (converts to WebP, replaces original)
npx -y bun ${SKILL_DIR}/scripts/main.ts image.png

# Custom output path
npx -y bun ${SKILL_DIR}/scripts/main.ts image.png -o compressed.webp

# Keep original file
npx -y bun ${SKILL_DIR}/scripts/main.ts image.png --keep

# Custom quality (0-100, default: 80)
npx -y bun ${SKILL_DIR}/scripts/main.ts image.png -q 75

# Keep original format
npx -y bun ${SKILL_DIR}/scripts/main.ts image.png -f png

Directory Processing

# Process all images in directory
npx -y bun ${SKILL_DIR}/scripts/main.ts ./images/

# Recursive processing
npx -y bun ${SKILL_DIR}/scripts/main.ts ./images/ -r

# With custom quality
npx -y bun ${SKILL_DIR}/scripts/main.ts ./images/ -r -q 75

Output Formats

# Plain text (default)
npx -y bun ${SKILL_DIR}/scripts/main.ts image.png

# JSON output
npx -y bun ${SKILL_DIR}/scripts/main.ts image.png --json

Options

Option	Short	Description	Default
`<input>`		Input file or directory	Required
`--output <path>`	`-o`	Output path	Same path, new extension
`--format <fmt>`	`-f`	webp, png, jpeg	webp
`--quality <n>`	`-q`	Quality 0-100	80
`--keep`	`-k`	Keep original file	false
`--recursive`	`-r`	Process directories recursively	false
`--json`		JSON output	false
`--help`	`-h`	Show help

Compressor Selection

Priority order (auto-detected):

sips (macOS built-in, WebP support since macOS 11)
cwebp (Google's official WebP tool)
ImageMagick (
```
convert
```
command)
Sharp (npm package, auto-installed by Bun)

The skill automatically selects the best available compressor.

Output Format

Text Mode (default)

image.png → image.webp (245KB → 89KB, 64% reduction)

JSON Mode

{
  "input": "image.png",
  "output": "image.webp",
  "inputSize": 250880,
  "outputSize": 91136,
  "ratio": 0.36,
  "compressor": "sips"
}

Directory JSON Mode

{
  "files": [...],
  "summary": {
    "totalFiles": 10,
    "totalInputSize": 2508800,
    "totalOutputSize": 911360,
    "ratio": 0.36,
    "compressor": "sips"
  }
}

Examples

Compress single image

npx -y bun ${SKILL_DIR}/scripts/main.ts photo.png
# photo.png → photo.webp (1.2MB → 340KB, 72% reduction)

Compress with custom quality

npx -y bun ${SKILL_DIR}/scripts/main.ts photo.png -q 60
# photo.png → photo.webp (1.2MB → 280KB, 77% reduction)

Keep original format

npx -y bun ${SKILL_DIR}/scripts/main.ts screenshot.png -f png --keep
# screenshot.png → screenshot-compressed.png (500KB → 380KB, 24% reduction)

Process entire directory

npx -y bun ${SKILL_DIR}/scripts/main.ts ./screenshots/ -r
# Processed 15 files: 12.5MB → 4.2MB (66% reduction)

Get JSON for scripting

npx -y bun ${SKILL_DIR}/scripts/main.ts image.png --json | jq '.ratio'

Extension Support

Custom configurations via EXTEND.md.

Check paths (priority order):

.baoyu-skills/baoyu-compress-image/EXTEND.md

(project)

~/.baoyu-skills/baoyu-compress-image/EXTEND.md

(user)

If found, load before workflow. Extension content overrides defaults.