cli11

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  "homepage": "https://cliutils.github.io/CLI11/book/",
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  "homepage_title": "Introduction \u00b7 CLI11 Tutorial",
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  "why_use_this": "CLI11 simplifies building CLI applications in C++ with automatic help generation, type-safe argument handling, and minimal boilerplate. It\u0027s header-only (no linking required), widely used in scientific and systems software, and more modern than getopt or boost::program_options for C++11+ projects."
}