realskyrin/capcap: README-based editorial guide

realskyrin/capcap describes itself in the README as "⌘⌘ - A lightweight, native macOS screenshot tool that lives in your menu bar. Double-tap ⌘ Command to capture any region of your screen , instantly copied to clipboard, or annotate first with pen and mosaic tools.". This article keeps to facts that can be checked in the repository. Stars, forks, and promotional badges are signals of attention, not proof of quality. Under "README", the README says: macOS 上最顺手的菜单栏截图工具：双击 ⌘ 即刻截图、标注、长截图、美化、钉图和上传。. That establishes the project's stated boundary, not a production test.

The README's "为什么选 capcap" section gives a useful starting point for deciding whether the project fits: 窗口一点即贴边，选区像素级精准。 悬停窗口一点截取，或拖拽任意区域，多显示器全量支持，按 Retina 原生分辨率输出。. If that problem is not yours, popularity is a poor reason to adopt it. Project names, commands, and component names are kept as written so a reader can return to the primary source without guessing at terminology. Another checkable README item is: 一个快捷键，零学习成本。 在任意 app 中双击 ⌘ 即刻唤起 capcap；也可以在设置中录制任何全局快捷键。. It can shape a first test, but it does not replace testing in the intended environment.

The operating model is spread across sections such as "README". The source evidence includes: macOS 14+  ·  Universal（Apple Silicon + Intel）. This article does not turn missing architecture, performance, or security details into claims. A real deployment still needs a look at the repository layout, configuration files, and release history.

Start installation from the README's documented entry point. A command that can be checked in the source is: brew tap realskyrin/tap brew install --cask realskyrin/tap/capcap When the README contains no runnable command, this article does not invent one. Open its "功能预览" section and confirm system dependencies, default ports, and first-run initialization before using a public server.