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Hybrid Retrieval-Augmented Generation (RAG) system for multi-language codebase analysis. MCP server combining static analysis, knowledge graphs, semantic search with local ML, and advanced graph algorithms for AI-powered code understanding.

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ragex priv parsers haskell README.md
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priv/parsers/haskell/README.md 

# Haskell Parser for Metastatic



This directory contains the Haskell parser infrastructure for the Metastatic project.



## Setup



### Install Stack (Haskell build tool)



```bash

curl -sSL https://get.haskellstack.org/ | sh

```



Or on Ubuntu/Debian:

```bash

wget -qO- https://get.haskellstack.org/ | sh

```



### Build the Parser



```bash

cd priv/parsers/haskell

stack setup  # Downloads GHC if needed (first time only)

stack build

```



### Test the Parser



```bash

echo "1 + 2" | stack exec parser

```



Expected output:

```json

{"status":"ok","ast":{"type":"infix","left":{"type":"literal","value":{"literalType":"int","value":1}},"operator":"+","right":{"type":"literal","value":{"literalType":"int","value":2}}},"errorMessage":null}

```



## Development



The parser uses:

- `haskell-src-exts` for parsing Haskell syntax

- `aeson` for JSON serialization

- Stack for dependency management



To add new AST node support, edit `Parser.hs` and add cases to `exprToJson`.



## CI Setup



For GitHub Actions, add the following step before running tests:



```yaml

- name: Set up Haskell

  uses: haskell-actions/setup@v2

  with:

    ghc-version: '9.6'

    enable-stack: true

    stack-version: 'latest'



- name: Build Haskell parser

  run: |

    cd priv/parsers/haskell

    stack setup

    stack build

```