Capture Screen Skill

capture-screen solves macOS’s screenshot quirks: the built-in tools either grab the whole screen, a clumsy region selector, or interactive mode that breaks scripts. This skill does window-level capture programmatically — name a window, get a clean PNG.

What’s automatable

• Window-level — capture exactly one app window, no surrounding chrome
• Multiple windows — grab several at once for side-by-side compositions
• Retina-aware — 2x or 3x density preserved
• Cropping — automatically trim shadows, title bars optionally
• Scriptable — repeatable in CI / docs pipelines

Where it shines

• Documentation screenshots — same crop every release
• README hero images — programmatically refreshed
• Comparison content — “before / after” or “competitor A vs B”
• Marketing material updates — refresh product shots without manual work
• Bug reports — capture the exact window in question

Composes with

• cli-demo-generator — record terminal demos
• wechat-article-writer — embed shots into articles
• pdf-creator / pptx — drop into documents and decks

→ Install on GitHub

Use capture-screen to grab a screenshot of just the Safari window
(not the whole desktop), output as 2x retina PNG. Then capture the
Terminal window, output side-by-side composition.