domains / families / security / modern-cpp

modern-cpp

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Guides C++ code toward modern idioms (C++20/23/26). Use when writing new C++ code, modernizing legacy patterns, or working on security-critical C++. Replaces raw pointers with smart pointers, SFINAE with concepts, printf with std::print, error codes with std::expected.

When to use

• Writing new C++ functions, classes, or libraries
• Modernizing existing C++ code (pre-C++20 patterns)
• Choosing between legacy and modern approaches
• Working on security-critical or safety-sensitive C++
• Reviewing C++ code for modern idiom adoption

When not to use

• **User explicitly requires older standard**: Respect constraints (embedded, legacy ABI)
• **Pure C code**: This skill is C++-specific
• **Build system questions**: CMake, Meson, Bazel configuration is out of scope
• **Non-C++ projects**: Mixed codebases where C++ isn't primary

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