diff --git a/docs/README.skills.md b/docs/README.skills.md index bbf74b69..381cbc66 100644 --- a/docs/README.skills.md +++ b/docs/README.skills.md @@ -28,6 +28,7 @@ Skills differ from other primitives by supporting bundled assets (scripts, code | [azure-role-selector](../skills/azure-role-selector/SKILL.md) | When user is asking for guidance for which role to assign to an identity given desired permissions, this agent helps them understand the role that will meet the requirements with least privilege access and how to apply that role. | `LICENSE.txt` | | [azure-static-web-apps](../skills/azure-static-web-apps/SKILL.md) | Helps create, configure, and deploy Azure Static Web Apps using the SWA CLI. Use when deploying static sites to Azure, setting up SWA local development, configuring staticwebapp.config.json, adding Azure Functions APIs to SWA, or setting up GitHub Actions CI/CD for Static Web Apps. | None | | [github-issues](../skills/github-issues/SKILL.md) | Create, update, and manage GitHub issues using MCP tools. Use this skill when users want to create bug reports, feature requests, or task issues, update existing issues, add labels/assignees/milestones, or manage issue workflows. Triggers on requests like "create an issue", "file a bug", "request a feature", "update issue X", or any GitHub issue management task. | `references/templates.md` | +| [image-manipulation-image-magick](../skills/image-manipulation-image-magick/SKILL.md) | Process and manipulate images using ImageMagick. Supports resizing, format conversion, batch processing, and retrieving image metadata. Use when working with images, creating thumbnails, resizing wallpapers, or performing batch image operations. | None | | [legacy-circuit-mockups](../skills/legacy-circuit-mockups/SKILL.md) | Generate breadboard circuit mockups and visual diagrams using HTML5 Canvas drawing techniques. Use when asked to create circuit layouts, visualize electronic component placements, draw breadboard diagrams, mockup 6502 builds, generate retro computer schematics, or design vintage electronics projects. Supports 555 timers, W65C02S microprocessors, 28C256 EEPROMs, W65C22 VIA chips, 7400-series logic gates, LEDs, resistors, capacitors, switches, buttons, crystals, and wires. | `references/28256-eeprom.md`
`references/555.md`
`references/6502.md`
`references/6522.md`
`references/6C62256.md`
`references/7400-series.md`
`references/assembly-compiler.md`
`references/assembly-language.md`
`references/basic-electronic-components.md`
`references/breadboard.md`
`references/common-breadboard-components.md`
`references/connecting-electronic-components.md`
`references/emulator-28256-eeprom.md`
`references/emulator-6502.md`
`references/emulator-6522.md`
`references/emulator-6C62256.md`
`references/emulator-lcd.md`
`references/lcd.md`
`references/minipro.md`
`references/t48eeprom-programmer.md` | | [make-skill-template](../skills/make-skill-template/SKILL.md) | Create new Agent Skills for GitHub Copilot from prompts or by duplicating this template. Use when asked to "create a skill", "make a new skill", "scaffold a skill", or when building specialized AI capabilities with bundled resources. Generates SKILL.md files with proper frontmatter, directory structure, and optional scripts/references/assets folders. | None | | [microsoft-code-reference](../skills/microsoft-code-reference/SKILL.md) | Look up Microsoft API references, find working code samples, and verify SDK code is correct. Use when working with Azure SDKs, .NET libraries, or Microsoft APIs—to find the right method, check parameters, get working examples, or troubleshoot errors. Catches hallucinated methods, wrong signatures, and deprecated patterns by querying official docs. | None | diff --git a/skills/image-manipulation-image-magick/SKILL.md b/skills/image-manipulation-image-magick/SKILL.md new file mode 100644 index 00000000..dfa17add --- /dev/null +++ b/skills/image-manipulation-image-magick/SKILL.md @@ -0,0 +1,252 @@ +--- +name: image-manipulation-image-magick +description: Process and manipulate images using ImageMagick. Supports resizing, format conversion, batch processing, and retrieving image metadata. Use when working with images, creating thumbnails, resizing wallpapers, or performing batch image operations. +compatibility: Requires ImageMagick installed and available as `magick` on PATH. Cross-platform examples provided for PowerShell (Windows) and Bash (Linux/macOS). +--- + +# Image Manipulation with ImageMagick + +This skill enables image processing and manipulation tasks using ImageMagick +across Windows, Linux, and macOS systems. + +## When to Use This Skill + +Use this skill when you need to: + +- Resize images (single or batch) +- Get image dimensions and metadata +- Convert between image formats +- Create thumbnails +- Process wallpapers for different screen sizes +- Batch process multiple images with specific criteria + +## Prerequisites + +- ImageMagick installed on the system +- **Windows**: PowerShell with ImageMagick available as `magick` (or at `C:\Program Files\ImageMagick-*\magick.exe`) +- **Linux/macOS**: Bash with ImageMagick installed via package manager (`apt`, `brew`, etc.) + +## Core Capabilities + +### 1. Image Information + +- Get image dimensions (width x height) +- Retrieve detailed metadata (format, color space, etc.) +- Identify image format + +### 2. Image Resizing + +- Resize single images +- Batch resize multiple images +- Create thumbnails with specific dimensions +- Maintain aspect ratios + +### 3. Batch Processing + +- Process images based on dimensions +- Filter and process specific file types +- Apply transformations to multiple files + +## Usage Examples + +### Example 0: Resolve `magick` executable + +**PowerShell (Windows):** +```powershell +# Prefer ImageMagick on PATH +$magick = (Get-Command magick -ErrorAction SilentlyContinue)?.Source + +# Fallback: common install pattern under Program Files +if (-not $magick) { + $magick = Get-ChildItem "C:\\Program Files\\ImageMagick-*\\magick.exe" -ErrorAction SilentlyContinue | + Select-Object -First 1 -ExpandProperty FullName +} + +if (-not $magick) { + throw "ImageMagick not found. Install it and/or add 'magick' to PATH." +} +``` + +**Bash (Linux/macOS):** +```bash +# Check if magick is available on PATH +if ! command -v magick &> /dev/null; then + echo "ImageMagick not found. Install it using your package manager:" + echo " Ubuntu/Debian: sudo apt install imagemagick" + echo " macOS: brew install imagemagick" + exit 1 +fi +``` + +### Example 1: Get Image Dimensions + +**PowerShell (Windows):** +```powershell +# For a single image +& $magick identify -format "%wx%h" path/to/image.jpg + +# For multiple images +Get-ChildItem "path/to/images/*" | ForEach-Object { + $dimensions = & $magick identify -format "%f: %wx%h`n" $_.FullName + Write-Host $dimensions +} +``` + +**Bash (Linux/macOS):** +```bash +# For a single image +magick identify -format "%wx%h" path/to/image.jpg + +# For multiple images +for img in path/to/images/*; do + magick identify -format "%f: %wx%h\n" "$img" +done +``` + +### Example 2: Resize Images + +**PowerShell (Windows):** +```powershell +# Resize a single image +& $magick input.jpg -resize 427x240 output.jpg + +# Batch resize images +Get-ChildItem "path/to/images/*" | ForEach-Object { + & $magick $_.FullName -resize 427x240 "path/to/output/thumb_$($_.Name)" +} +``` + +**Bash (Linux/macOS):** +```bash +# Resize a single image +magick input.jpg -resize 427x240 output.jpg + +# Batch resize images +for img in path/to/images/*; do + filename=$(basename "$img") + magick "$img" -resize 427x240 "path/to/output/thumb_$filename" +done +``` + +### Example 3: Get Detailed Image Information + +**PowerShell (Windows):** +```powershell +# Get verbose information about an image +& $magick identify -verbose path/to/image.jpg +``` + +**Bash (Linux/macOS):** +```bash +# Get verbose information about an image +magick identify -verbose path/to/image.jpg +``` + +### Example 4: Process Images Based on Dimensions + +**PowerShell (Windows):** +```powershell +Get-ChildItem "path/to/images/*" | ForEach-Object { + $dimensions = & $magick identify -format "%w,%h" $_.FullName + if ($dimensions) { + $width,$height = $dimensions -split ',' + if ([int]$width -eq 2560 -or [int]$height -eq 1440) { + Write-Host "Processing $($_.Name)" + & $magick $_.FullName -resize 427x240 "path/to/output/thumb_$($_.Name)" + } + } +} +``` + +**Bash (Linux/macOS):** +```bash +for img in path/to/images/*; do + dimensions=$(magick identify -format "%w,%h" "$img") + if [[ -n "$dimensions" ]]; then + width=$(echo "$dimensions" | cut -d',' -f1) + height=$(echo "$dimensions" | cut -d',' -f2) + if [[ "$width" -eq 2560 || "$height" -eq 1440 ]]; then + filename=$(basename "$img") + echo "Processing $filename" + magick "$img" -resize 427x240 "path/to/output/thumb_$filename" + fi + fi +done +``` + +## Guidelines + +1. **Always quote file paths** - Use quotes around file paths that might contain spaces +2. **Use the `&` operator (PowerShell)** - Invoke the magick executable using `&` in PowerShell +3. **Store the path in a variable (PowerShell)** - Assign the ImageMagick path to `$magick` for cleaner code +4. **Wrap in loops** - When processing multiple files, use `ForEach-Object` (PowerShell) or `for` loops (Bash) +5. **Verify dimensions first** - Check image dimensions before processing to avoid unnecessary operations +6. **Use appropriate resize flags** - Consider using `!` to force exact dimensions or `^` for minimum dimensions + +## Common Patterns + +### PowerShell Patterns + +#### Pattern: Store ImageMagick Path + +```powershell +$magick = (Get-Command magick).Source +``` + +#### Pattern: Get Dimensions as Variables + +```powershell +$dimensions = & $magick identify -format "%w,%h" $_.FullName +$width,$height = $dimensions -split ',' +``` + +#### Pattern: Conditional Processing + +```powershell +if ([int]$width -gt 1920) { + & $magick $_.FullName -resize 1920x1080 $outputPath +} +``` + +#### Pattern: Create Thumbnails + +```powershell +& $magick $_.FullName -resize 427x240 "thumbnails/thumb_$($_.Name)" +``` + +### Bash Patterns + +#### Pattern: Check ImageMagick Installation + +```bash +command -v magick &> /dev/null || { echo "ImageMagick required"; exit 1; } +``` + +#### Pattern: Get Dimensions as Variables + +```bash +dimensions=$(magick identify -format "%w,%h" "$img") +width=$(echo "$dimensions" | cut -d',' -f1) +height=$(echo "$dimensions" | cut -d',' -f2) +``` + +#### Pattern: Conditional Processing + +```bash +if [[ "$width" -gt 1920 ]]; then + magick "$img" -resize 1920x1080 "$outputPath" +fi +``` + +#### Pattern: Create Thumbnails + +```bash +filename=$(basename "$img") +magick "$img" -resize 427x240 "thumbnails/thumb_$filename" +``` + +## Limitations + +- Large batch operations may be memory-intensive +- Some complex operations may require additional ImageMagick delegates +- On older Linux systems, use `convert` instead of `magick` (ImageMagick 6.x vs 7.x)