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ImageMagick 7+ image manipulation commands and best practices
Install with Codex or Claude Copy this prompt, paste it into Codex, Claude, or another assistant, and let it review the skill page and install it for you.
Based on SOC occupation classification
Render a document, a diagram, or a report as HTML for human visualisation.
Use when writing prose meant to read by humans: PR descriptions, docs, blog drafts, emails, design memos
Guidelines on creating issues on GitHub
Run a premortem on any plan, launch, product, hire, strategy, or decision. Assumes it already failed 6 months from now and works backward to find every reason why. Produces a revised plan with blind spots exposed. MANDATORY TRIGGERS: 'premortem this', 'premortem my', 'run a premortem', 'what could kill this', 'future-proof this', 'stress test this plan', 'what am i missing here', 'find the blind spots'. STRONG TRIGGERS: 'what could go wrong', 'am i missing anything', 'poke holes in this', 'where will this break', 'devil's advocate this'. Do NOT trigger on simple feedback requests, or factual questions. DO trigger when someone has a plan or commitment where the cost of being wrong is high.
Schedule a prompt to fire back at yourself at a future time or on a recurring cron pattern. Use when the user says "remind me", "every N minutes/hours/days", "at HH:MM tomorrow", "check X periodically", or otherwise asks for any time-based action. Triggered by the `schedule` tool plus the `/schedule` command for listing and deletion.
Interview the user relentlessly about a plan or design until reaching shared understanding, resolving each branch of the decision tree. Use when user wants to stress-test a plan, get roasted on their design, or mentions "brainstorm".
| name | imagemagick |
| description | ImageMagick 7+ image manipulation commands and best practices |
magick, Not convertIn ImageMagick 7+, the convert command is deprecated. Use magick instead:
# Wrong (generates warnings)
convert input.png output.jpg
# Correct
magick input.png output.jpg
# Also correct (explicit tool)
magick convert input.png output.jpg
magick input.png output.jpg
magick input.jpg -format webp output.webp
magick input.jpg -resize 50% output.jpg
magick input.jpg -resize 1920x1080 output.jpg
magick input.jpg -resize 1920x1080^ output.jpg # Minimum dimensions
# JPEG quality (0-100, higher is better quality, larger file)
magick input.png -quality 85 output.jpg
magick input.jpg -strip output.jpg
for file in *.png; do
magick "$file" "${file%.png}.jpg"
done
| Flag | Description |
|---|---|
-quality N | JPEG compression (0-100) |
-resize WxH | Resize to dimensions |
-strip | Remove metadata |
-format FMT | Specify output format |
-auto-orient | Fix orientation from EXIF |
-compress type | Compression type (lossy, lossless, none) |
convert, mogrify, identify as separate commandsmagick <tool> (e.g., magick convert, magick mogrify)magick --version
"$file"-strip to reduce file size by removing EXIF/metadata-quality 85 for web images