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Use modern C++ deliberately
Apply RAII, value semantics, smart pointers, templates, concepts, ranges, exceptions, and move behavior according to project standards.
C++ development
CategorySoftware Development
Codex Skills for C++
Codex Skills for C++ give Codex a careful workflow for navigating large codebases, managing ownership and lifetime, using modern language features, handling concurrency, building with CMake, testing behavior, and diagnosing performance. Download the skills for C++ work where undefined behavior and platform details matter.
Use modern C++ deliberatelyControl ownership and lifetimeBuild concurrent and native systemsVerify deeply
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task: complete c++ development task
inspect:
- requirements and context
- existing standards
- failure and edge cases
verify: outputs + checks + handoffWhy a specialist workflow matters
C++ code can compile and pass ordinary tests while still containing lifetime errors, data races, undefined behavior, ABI assumptions, or platform-specific defects.
Strong c++ development work depends on context, explicit decisions, and checks that match the real environment.
These skills give Codex a specialist workflow for c++ development while preserving local conventions, important constraints, and human review.
What the downloadable skills can do
What Codex Skills for C++ can help accomplish
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Control ownership and lifetime
Make resource, pointer, view, iterator, callback, and thread lifetime explicit across interfaces.
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Build concurrent and native systems
Handle synchronization, atomics, cancellation, memory ordering, files, networking, libraries, and platform APIs.
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Verify deeply
Run builds, tests, warnings, static analysis, sanitizers, fuzzing, benchmarks, and profiling where supported.
A repeatable working process
How the c++ development workflow moves from request to verified result
The steps keep context, implementation, and verification visible so the result can be reviewed and repeated.
workflow.statusREADY
Context → Plan → Work → Verify
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Inspect the build matrix
Read language standard, compilers, platforms, CMake targets, flags, dependencies, generated code, and tests.
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Trace lifetime and contracts
Follow ownership, aliases, errors, thread access, binary boundaries, and caller expectations.
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Implement within constraints
Prefer clear RAII designs, preserve compatibility, isolate platform code, and avoid speculative rewrites.
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Exercise the toolchain
Build relevant configurations, test, enable warnings and sanitizers, analyze, fuzz, or profile according to risk.
Useful across real projects
Where Codex Skills for C++ fit
The workflow adjusts to the project, audience, tools, and risk while preserving the same quality standard.
Systems software
Develop engines, runtimes, services, drivers, storage, networking, and native tools.
Libraries and SDKs
Design APIs, ownership contracts, ABI boundaries, compatibility, packaging, examples, and tests.
Games and graphics
Build performance-sensitive engine, rendering, simulation, tooling, and gameplay systems.
Embedded software
Work with constrained resources, hardware interfaces, cross-compilation, and deterministic behavior.
Common requests
Tasks these skills can handle
Start with one defined outcome and provide the source material, constraints, and checks that matter.
01Create a CMake target
02Modernize legacy C++
03Fix a lifetime bug
04Design a library API
05Implement concurrency safely
06Write unit tests
07Run sanitizers
08Profile a performance hotspot
Who benefits most
Who Is This For?
These skills are designed for people who need dependable c++ development work with a visible process.
C++ developers
Build and maintain native applications, libraries, systems, and tools.
Game and engine teams
Work on performance-sensitive code with explicit memory and platform behavior.
Systems engineers
Control resources, concurrency, binary interfaces, and operational constraints.
Developers modernizing legacy code
Introduce safer patterns incrementally while preserving compatibility.
Good to know:
The skills assist C++ engineering, but safety-critical code, low-level concurrency, ABI changes, embedded targets, and security-sensitive components require expert review.
Set up the workflow
Installation Guide
Install the complete skill folder and add the project-specific context before beginning.
Download and extract the skills
Keep SKILL.md with the included c++ development guidance, checks, and supporting files.
Choose project or personal scope
Use project scope for local rules and versions, or personal scope for a reusable workflow.
Add the working context
Document the tools, audience, standards, source material, constraints, and approval rules for this c++ development work.
Define completion before starting
Provide the intended outcome, important edge cases, required checks, and expected handoff.
Before you download
Frequently Asked Questions
Practical answers about capabilities, limits, setup, and review.
Which C++ standards are supported?+
The workflow follows the standard, compilers, and compatibility targets defined by the project.
Do the skills support CMake?+
Yes. They can inspect and edit targets, properties, dependencies, presets, tests, installation, and packaging.
Can they find memory errors?+
They can trace ownership and use compiler diagnostics, sanitizers, static analysis, tests, and debugging tools.
Do they handle templates?+
Yes. They can design and debug generic code while considering diagnostics, compilation cost, and API clarity.
Will they optimize performance?+
They profile before changing algorithms, data layout, allocations, vectorization, or concurrency.
Make the work repeatable
Give Codex a c++ development workflow built around real context, deliberate execution, and evidence that the result is ready.
Clear context. Purposeful work. Relevant checks. A result others can understand.