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Run npx skillmds@latest add modbender/clangd-lsp in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

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Is Clangd Lsp free to use?

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Who published Clangd Lsp?

modbender (@modbender) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Clangd Lsp by modbender — Agent Skill

Name: Clangd Lsp
Rating: 4.5 (4 reviews)
Author: modbender

Clangd Lsp

C/C++ language server (clangd) providing code intelligence, diagnostics, and formatting for .c, .h, .cpp, .cc, .cxx, .hpp, .hxx files. Use when working with C or C++ code that needs autocomplete, go-to-definition, find references, error detection, or refactoring support.

modbender Updated Sep 9, 2026 12 repo stars

File contents

clangd LSP

C/C++ language server integration providing comprehensive code intelligence through clangd (part of LLVM).

Capabilities

Code intelligence: Autocomplete, go-to-definition, find references
Error detection: Real-time diagnostics for compilation errors
Formatting: Code formatting with clang-format
Refactoring: Rename symbols, extract function
Supported extensions: .c, .h, .cpp, .cc, .cxx, .hpp, .hxx, .C, .H

Installation

Via Homebrew (macOS)

brew install llvm
# Add to PATH
export PATH="/opt/homebrew/opt/llvm/bin:$PATH"

Via package manager (Linux)

# Ubuntu/Debian
sudo apt install clangd

# Fedora
sudo dnf install clang-tools-extra

# Arch Linux
sudo pacman -S clang

Windows

winget install LLVM.LLVM

Or download from LLVM releases.

Verify installation:

clangd --version

Usage

The language server runs automatically in LSP-compatible editors. For manual operations:

Compile

gcc file.c -o output      # C
g++ file.cpp -o output    # C++
clang file.c -o output    # with clang

Format code

clang-format -i file.cpp

Static analysis

clang-tidy file.cpp -- -std=c++17

Configuration

Create .clangd in project root:

CompileFlags:
  Add: [-std=c++17, -Wall, -Wextra]
  Remove: [-W*]
Diagnostics:
  UnusedIncludes: Strict
  MissingIncludes: Strict

Or compile_commands.json for complex projects:

cmake -DCMAKE_EXPORT_COMPILE_COMMANDS=ON .
# or
bear -- make

Integration Pattern

When editing C/C++ code:

clangd uses compile_commands.json for project understanding
Run clang-format to format code
Use clang-tidy for static analysis
Compile with warnings enabled (-Wall -Wextra)

Common Flags

Compile flags:

-std=c++17 - C++17 standard
-Wall -Wextra - Enable warnings
-O2 - Optimization level
-g - Debug symbols
-I<path> - Include path
-L<path> - Library path

clang-tidy checks:

clang-tidy file.cpp --checks='*' --
clang-tidy file.cpp --fix --  # Auto-fix

More Information

---name: clangd-lspdescription: C/C++ language server (clangd) providing code intelligence, diagnostics, and formatting for .c, .h, .cpp, .cc, .cxx, .hpp, .hxx files. Use when working with C or C++ code that needs autocomplete, go-to-definition, find references, error detection, or refactoring support.--- # clangd LSP C/C++ language server integration providing comprehensive code intelligence through clangd (part of LLVM). ## Capabilities - **Code intelligence**: Autocomplete, go-to-definition, find references - **Error detection**: Real-time diagnostics for compilation errors - **Formatting**: Code formatting with clang-format - **Refactoring**: Rename symbols, extract function - **Supported extensions**: `.c`, `.h`, `.cpp`, `.cc`, `.cxx`, `.hpp`, `.hxx`, `.C`, `.H` ## Installation ### Via Homebrew (macOS) ```bash brew install llvm # Add to PATH export PATH="/opt/homebrew/opt/llvm/bin:$PATH" ``` ### Via package manager (Linux) ```bash # Ubuntu/Debian sudo apt install clangd # Fedora sudo dnf install clang-tools-extra # Arch Linux sudo pacman -S clang ``` ### Windows ```bash winget install LLVM.LLVM ``` Or download from [LLVM releases](https://github.com/llvm/llvm-project/releases). Verify installation: ```bash clangd --version ``` ## Usage The language server runs automatically in LSP-compatible editors. For manual operations: ### Compile ```bash gcc file.c -o output # C g++ file.cpp -o output # C++ clang file.c -o output # with clang ``` ### Format code ```bash clang-format -i file.cpp ``` ### Static analysis ```bash clang-tidy file.cpp -- -std=c++17 ``` ## Configuration Create `.clangd` in project root: ```yaml CompileFlags: Add: [-std=c++17, -Wall, -Wextra] Remove: [-W*] Diagnostics: UnusedIncludes: Strict MissingIncludes: Strict ``` Or `compile_commands.json` for complex projects: ```bash cmake -DCMAKE_EXPORT_COMPILE_COMMANDS=ON . # or bear -- make ``` ## Integration Pattern When editing C/C++ code: 1. clangd uses `compile_commands.json` for project understanding 2. Run `clang-format` to format code 3. Use `clang-tidy` for static analysis 4. Compile with warnings enabled (`-Wall -Wextra`) ## Common Flags **Compile flags:** - `-std=c++17` - C++17 standard - `-Wall -Wextra` - Enable warnings - `-O2` - Optimization level - `-g` - Debug symbols - `-I<path>` - Include path - `-L<path>` - Library path **clang-tidy checks:** ```bash clang-tidy file.cpp --checks='*' -- clang-tidy file.cpp --fix -- # Auto-fix ``` ## More Information - [clangd Website](https://clangd.llvm.org/) - [Getting Started Guide](https://clangd.llvm.org/installation) - [LLVM Project](https://llvm.org/)

Frequently asked questions