openharmony-cpp

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Expert coding guide for OpenHarmony C++ development. Use this skill when writing, refactoring, or reviewing C++ code for OpenHarmony projects. It enforces strict project-specific conventions (naming, formatting, headers) and critical security requirements (input validation, memory safety).

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Sourceopenharmonyinsight/openharmony-skills

Added on2026-02-10

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SKILL.md Content

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OpenHarmony C++ Coding Skills

Core Mandates (Common Pitfalls)

These rules are strictly enforced in OpenHarmony and often differ from general C++ projects.

1. Strict Naming & Formatting

Extensions: Always use
```
.cpp
```
and
```
.h
```
.
Files: Filenames must match class names (Unix-like, e.g.,
```
my_class.cpp
```
).
Variables: Global vars must start with
```
g_
```
(e.g.,
```
g_config
```
). Class members must end with
```
_
```
(e.g.,
```
value_
```
).
Braces: K&R Style is mandatory (opening brace on the same line).
Details: See naming_formatting.md.

2. Header Management

Guards: Use
```
#ifndef
```
guards. #pragma once is FORBIDDEN.
Includes: Prefer
```
#include
```
over forward declarations to prevent hidden dependencies.
Details: See headers_scopes.md.

3. Critical Security Requirements

Input Validation: All external data must be validated before use (indices, sizes, loops).
Memory Safety: Pointers must be set to
```
nullptr
```
immediately after deletion.
Bitwise: Only on unsigned types.
Details: See secure_coding.md.

Usage Guide

When to use

New Code: Generating new classes or modules.
Refactoring: Cleaning up legacy code.
Review: Checking code against OpenHarmony standards.

Reference Map

naming_formatting.md: Naming conventions (g_, _), braces (K&R), line length.
secure_coding.md: Input validation, integer safety, memory management, prohibited functions.
class_function_design.md: Constructors, inheritance, modern C++ (nullptr, const), function size.
headers_scopes.md: Header guards, namespaces, include rules.