Image Compressor Skill | Agent Skills

Image Compressor

Compresses images using best available tool (sips → cwebp → ImageMagick → Sharp).

Script Directory

Scripts in scripts/ subdirectory. {baseDir} = this SKILL.md's directory path. Resolve ${BUN_X} runtime: if bun installed → bun; if npx available → npx -y bun; else suggest installing bun. Replace {baseDir} and ${BUN_X} with actual values.

| Script | Purpose | |--------|---------| | scripts/main.ts | Image compression CLI |

Preferences (EXTEND.md)

Check EXTEND.md existence (priority order):

# macOS, Linux, WSL, Git Bash
test -f .baoyu-skills/baoyu-compress-image/EXTEND.md && echo "project"
test -f "${XDG_CONFIG_HOME:-$HOME/.config}/baoyu-skills/baoyu-compress-image/EXTEND.md" && echo "xdg"
test -f "$HOME/.baoyu-skills/baoyu-compress-image/EXTEND.md" && echo "user"

# PowerShell (Windows)
if (Test-Path .baoyu-skills/baoyu-compress-image/EXTEND.md) { "project" }
$xdg = if ($env:XDG_CONFIG_HOME) { $env:XDG_CONFIG_HOME } else { "$HOME/.config" }
if (Test-Path "$xdg/baoyu-skills/baoyu-compress-image/EXTEND.md") { "xdg" }
if (Test-Path "$HOME/.baoyu-skills/baoyu-compress-image/EXTEND.md") { "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

${BUN_X} {baseDir}/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)
${BUN_X} {baseDir}/scripts/main.ts image.png

# Keep PNG format
${BUN_X} {baseDir}/scripts/main.ts image.png -f png --keep

# Directory recursive
${BUN_X} {baseDir}/scripts/main.ts ./images/ -r -q 75

# JSON output
${BUN_X} {baseDir}/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