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# LangGraph Code Review Agent
## Overview
This repository contains a LangGraph agent that performs a code review on a given Python function. The agent:
1. Generates an initial draft review.
2. Critiques the draft on four criteria (PEP8, type hints, edge cases, naming).
3. If the review needs revision, rewrites the weakest part up to a maximum number of rounds.
## Requirements
```text
langgraph>=0.2.0
langchain-openai>=0.2.0
python-dotenv
```
Install dependencies:
```bash
pip install -r requirements.txt
```
## Running the Demo
```bash
python main.py
```
The demo uses a simple `sort_numbers` function. The output shows the final review, the scores, and the verdict.
## Usage
You can import the `run_demo` function or use the graph directly in your own code.
```python
from main import graph, CodeReviewState
state = CodeReviewState(
code="def foo(x): return x+1",
draft_review="",
criteria_scores={},
weakest_criterion="",
verdict="",
round=0,
max_rounds=2,
)
result = await graph.ainvoke(state)
```
## Environment Variables
The agent uses OpenAI. Set `OPENAI_API_KEY` in your environment or in a `.env` file.