About this skill

What problem it solves

When reading unfamiliar C++ snippets, the hard part is often not the function names but what keywords do in context: constexpr, decltype, requires, noexcept, explicit, override, alignas, and similar features. This skill turns keyword guessing into a structured explanation: it first identifies the code's purpose, then breaks down headers, functions/classes, control flow, and input/output, and finally explains keyword-level behavior.

How it works

After receiving a code snippet with formatting preserved, it analyzes in this order:
- Macro orientation: classifies the code as algorithm, data structure, system programming, OOP, templates, etc., and notes the main programming paradigm.
- Structure breakdown: lists header purpose, function/class intent, major control flow, and I/O relationships.
- Keyword explanation: uses the scope of references/cpp_keywords.md to explain basic types, control flow, function parameters, templates, memory management, exception handling, and C++11/14/17/20 features.
- Report output: produces a readable report using a whole-to-local approach, with short code examples when complex concepts need clarification.

Boundaries

It is better suited for explaining existing C++ code's functionality and syntax than replacing compiler diagnostics, static analysis, or performance tuning. If the code depends on private macros, external library ABIs, platform builtins, or context not provided, the explanation is limited to visible code. For complex template deduction or runtime behavior, combine standard references, compiler diagnostics, and actual execution results.

Screenshots

Use Cases

When taking over an old C++ module, quickly clarify the purpose, control flow, and `override` meaning of a class wrapper.
When reviewing an algorithm snippet, ask it to explain `constexpr`, template parameters, and exception handling in context.
Before debugging compile errors, break down function templates, parameter passing, and memory-related code to confirm keyword intent.
When reading systems code, analyze headers, I/O relationships, and syntax such as `noexcept` that affects logic.

Best For

Junior engineers reading an unfamiliar C++ project who want to understand why functions, classes, and keywords are written that way.
C++ developers in code review who need to quickly explain how template, exception-handling, and memory-management syntax affects module behavior.
Maintenance engineers taking over legacy systems who need to map headers, function definitions, and I/O relationships to keyword usage.
Engineers learning C++ standard features who want to understand C++11/14/17/20 keyword usage through concrete snippets.