---
description: "Supported programming languages and their feature coverage in Code-Graph-RAG."
---

# Language Support

Code-Graph-RAG uses Tree-sitter for language-agnostic AST parsing with a unified graph schema across all languages.

## Support Matrix

<!-- SECTION:supported_languages -->
| Language | Status | Extensions | Functions | Classes/Structs | Modules | Package Detection | Additional Features |
|--------|------|----------|---------|---------------|-------|-----------------|-------------------|
| C | Fully Supported | .c | ✓ | ✓ | ✓ | ✓ | Functions, structs, unions, enums, preprocessor includes |
| C# | Fully Supported | .cs | ✓ | ✓ | ✓ | - | Namespaces (block and file-scoped), classes/structs/records/interfaces/enums, generics, inheritance/interfaces/overrides, typed call resolution with overloads, using directives |
| C++ | Fully Supported | .cpp, .h, .hpp, .cc, .cxx, .hxx, .hh, .ixx, .cppm, .ccm | ✓ | ✓ | ✓ | ✓ | Constructors, destructors, operator overloading, templates, lambdas, C++20 modules, namespaces, preprocessor macros |
| Dart | Fully Supported | .dart | ✓ | ✓ | ✓ | - | Classes, mixins, extensions, enhanced enums, factory/named constructors, Flutter widgets, package/relative/dart: imports, part directives, pubspec dependencies |
| Go | Fully Supported | .go | ✓ | ✓ | ✓ | - | Receiver methods with cross-file binding, structs, interfaces, type declarations, function-local types |
| Java | Fully Supported | .java | ✓ | ✓ | ✓ | - | Generics, annotations, modern features (records/sealed classes), concurrency, reflection |
| JavaScript | Fully Supported | .js, .jsx, .mjs, .cjs | ✓ | ✓ | ✓ | - | ES6 modules, CommonJS, prototype methods, object methods, arrow functions |
| Lua | Fully Supported | .lua | ✓ | - | ✓ | - | Local/global functions, metatables, closures, coroutines |
| PHP | Fully Supported | .php | ✓ | ✓ | ✓ | - | Classes, interfaces, traits, enums, namespaces, PHP 8 attributes |
| Python | Fully Supported | .py | ✓ | ✓ | ✓ | ✓ | Type inference, decorators, nested functions |
| Rust | Fully Supported | .rs | ✓ | ✓ | ✓ | ✓ | impl blocks, associated functions, macro_rules! macros |
| TypeScript (TSX) | Fully Supported | .tsx | ✓ | ✓ | ✓ | - | All TypeScript features plus JSX elements and components |
| TypeScript | Fully Supported | .ts, .mts, .cts | ✓ | ✓ | ✓ | - | Interfaces, type aliases, enums, namespaces, ES6/CommonJS modules |
| Scala | In Development | .scala, .sc | ✓ | ✓ | ✓ | - | Case classes, objects |
<!-- /SECTION:supported_languages -->

## Language-Agnostic Design

All languages share a unified graph schema, meaning queries work the same way regardless of language. You can query across languages in the same knowledge graph when analysing polyglot repositories.

## Adding New Languages

Code-Graph-RAG makes it easy to add support for any language that has a Tree-sitter grammar. See the [Adding Languages](../advanced/adding-languages.md) guide.

!!! tip
    While you can add languages yourself, we recommend waiting for official full support for optimal parsing quality and comprehensive feature coverage. [Submit a language request](https://github.com/vitali87/code-graph-rag/issues) if you need a specific language supported.