How to Use Cpp Pro in Claude Code: Beginner's Guide with Examples

Feb 14, 2026

Purpose

This post demonstrates how to use the Cpp Pro skill in Claude Code for C++ development tasks.

What is Cpp Pro?

Cpp Pro is a specialized skill in the claude-skills ecosystem that provides idiomatic C++ patterns, modern C++ best practices, and language-specific guidance. It helps when you’re working with C++ code and need assistance with:

Modern C++ features (C++11/14/17/20/23)
RAII and resource management
Template metaprogramming
Memory safety patterns
Performance optimization
Build system integration (CMake, Meson)

The skill exists because C++ has unique complexities that require specialized knowledge. A general-purpose assistant might suggest patterns that work in Python or JavaScript but are dangerous in C++.

When to Use Cpp Pro

I use Cpp Pro when:

Writing or refactoring C++ code
Reviewing C++ code for idiomatic patterns
Debugging C++-specific issues (memory leaks, undefined behavior)
Implementing modern C++ features
Optimizing C++ performance

Installation and Setup

First, ensure you have the claude-skills plugin installed:

# Install claude-skills
npm install -g claude-skills

# Or using cargo
cargo install claude-skills

The Cpp Pro skill activates automatically when:

You’re working in a directory with .cpp, .hpp, .h, .cc, or .cxx files
You mention C++ explicitly in your request
You use the skill invocation: /cpp-pro

Verify the skill is available:

claude-skills list | grep cpp-pro

Core Usage Patterns

Basic Invocation

When I need C++ help, I can invoke the skill directly:

Use cpp-pro to review this code

Or use the slash command:

/cpp-pro "How do I implement RAII for this resource?"

Common Trigger Phrases

The skill activates with phrases like:

“Review this C++ code for modern patterns”
“Is this exception-safe?”
“Help me optimize this C++ function”
“Convert this C++98 code to C++20”
“What’s the idiomatic C++ way to…”

Typical Use Cases

I use Cpp Pro for specific scenarios:

Scenario 1: Code Review

When I have a C++ file and want to ensure it follows modern practices:

/Users/username/project/src/processor.cpp: Use cpp-pro to review this file for memory safety issues

Scenario 2: Pattern Implementation

When I need to implement a specific C++ pattern:

Show me how to implement the pimpl idiom in modern C++ with unique_ptr

Scenario 3: Migration

When updating legacy code:

Convert this raw pointer code to use smart pointers and RAII

Practical Examples

Example 1: Resource Management with RAII

I had a file handler that wasn’t exception-safe:

class FileHandler {
    FILE* file;
public:
    FileHandler(const char* filename) {
        file = fopen(filename, "r");
    }

    ~FileHandler() {
        if (file) {
            fclose(file);
        }
    }

    void write(const char* data) {
        fprintf(file, "%s", data);
    }
};

I asked Cpp Pro to review this class. The skill identified issues:

No copy semantics defined (leads to double-close)
No move semantics
Constructor doesn’t check if file opened successfully

Here’s the improved version:

class FileHandler {
    FILE* file;
public:
    FileHandler(const char* filename) : file(fopen(filename, "r")) {
        if (!file) {
            throw std::runtime_error("Failed to open file");
        }
    }

    // Delete copy to prevent double-close
    FileHandler(const FileHandler&) = delete;
    FileHandler& operator=(const FileHandler&) = delete;

    // Enable move
    FileHandler(FileHandler&& other) noexcept : file(other.file) {
        other.file = nullptr;
    }

    FileHandler& operator=(FileHandler&& other) noexcept {
        if (this != &other) {
            if (file) fclose(file);
            file = other.file;
            other.file = nullptr;
        }
        return *this;
    }

    ~FileHandler() {
        if (file) {
            fclose(file);
        }
    }

    void write(const char* data) {
        fprintf(file, "%s", data);
    }
};

The key improvements:

Deleted copy constructor/assignment
Added move constructor/assignment
Constructor throws on failure
noexcept on move operations

Example 2: Modern C++ Iteration

I had old-style iteration code:

std::vector<int> numbers = {1, 2, 3, 4, 5};

for (std::vector<int>::iterator it = numbers.begin(); it != numbers.end(); ++it) {
    *it *= 2;
}

Using Cpp Pro, I learned to modernize this:

std::vector<int> numbers = {1, 2, 3, 4, 5};

// Range-based for loop (C++11)
for (auto& num : numbers) {
    num *= 2;
}

// Or using algorithms (C++20)
std::ranges::for_each(numbers, [](auto& num) {
    num *= 2;
});

The skill explained:

Range-based for is clearer and less error-prone
Algorithms express intent better
auto& avoids copies and allows modification

Example 3: Smart Pointer Usage

I had manual memory management:

class Component {
    ResourceManager* manager;
public:
    Component() : manager(new ResourceManager()) {}

    ~Component() {
        delete manager;
    }
};

Cpp Pro showed me the modern approach:

class Component {
    std::unique_ptr<ResourceManager> manager;
public:
    Component() : manager(std::make_unique<ResourceManager>()) {}

    // No destructor needed - unique_ptr handles cleanup
    // No copy/move needed - compiler-generated versions work
};

The benefits:

Automatic cleanup even if constructor throws
No need to manually define destructor
Exception-safe by default
std::make_unique is more efficient (single allocation)

Best Practices

DO: Recommended Practices

1. Use the skill early in development

When I start a C++ feature, I invoke Cpp Pro immediately:

Use cpp-pro to help design the interface for this thread pool class

This prevents writing code that needs major refactoring later.

2. Provide context

Instead of vague requests, I give specific context:

/cpp-pro "I'm writing a high-frequency trading system in C++20. Review this order matching engine for lock contention issues"

3. Ask for explanations

When Cpp Pro suggests code, I ask why:

Why use std::span instead of std::vector_view here?

This helps me learn the reasoning behind patterns.

4. Request modern alternatives

When I see old code, I ask:

/cpp-pro "Show me how to rewrite this C++98 function using C++20 ranges"

5. Get performance guidance

I ask about optimization:

Review this hot path function for cache efficiency and suggest C++20 optimizations

DON’T: Common Mistakes

1. Don’t use Cpp Pro for other languages

The skill is C++-specific. For Python, use python-patterns. For JavaScript, use coding-standards.

2. Don’t ignore C++ core guidelines

Cpp Pro aligns with the C++ Core Guidelines. When the skill references a guideline, I look it up.

3. Don’t skip compilation checks

After Cpp Pro suggests changes, I verify they compile:

g++ -std=c++20 -Wall -Wextra -pedantic main.cpp

4. Don’t assume modern C++ is always better

I ask Cpp Pro about trade-offs:

Should I use std::expected or exceptions for error handling in this embedded system?

5. Don’t forget build systems

Cpp Pro helps with CMake and Meson:

/cpp-pro "Help me set up a CMake project with proper target linkage and modern C++20 flags"

Tips for Maximum Effectiveness

1. Pair with other skills

I use Cpp Pro with complementary skills:

tdd-workflow for test-driven C++ development
security-review for memory safety checks
build-fix when compilation fails

2. Provide error messages

When code fails to compile, I show Cpp Pro the full error:

g++ -std=c++20 main.cpp

error: no matching function for call to 'process'

Then I ask:

Use cpp-pro to resolve this template deduction failure

3. Request specific standards

I’m explicit about which C++ standard I’m using:

/cpp-pro "Write this code using only C++17 features - no C++20"

4. Ask about alternatives

When Cpp Pro suggests a solution, I ask:

What are the trade-offs between this approach and using std::variant?

Complementary Skills

golang-patterns: If you’re working with C++ and Go interop
security-review: For memory safety and vulnerability checks
build-fix: For CMake and compilation issues
tdd-workflow: For test-driven C++ development

Official Documentation

Community Resources

Summary

In this post, I showed how to use the Cpp Pro skill in Claude Code for C++ development. I covered installation, basic usage patterns, practical examples for RAII and modern C++ features, and best practices for getting the most from the skill. The key point is that Cpp Pro provides idiomatic, modern C++ guidance that general-purpose assistants can’t match, especially for memory safety and resource management.

Final Words + More Resources

My intention with this article was to help others share my knowledge and experience. If you want to contact me, you can contact by email: Email me

Here are also the most important links from this article along with some further resources that will help you in this scope:

👨‍💻 claude-skills Documentation
👨‍💻 claude-skills GitHub Repository

Oh, and if you found these resources useful, don’t forget to support me by starring the repo on GitHub!