Building PRRover: A FastAPI GitHub PR Reviewer with Telex A2A Integration

PRRover is an AI-powered GitHub Pull Request reviewer integrated with the Telex AI agent platform using the A2A protocol. It analyzes code for security vulnerabilities, performance issues, and best practice adherence, delivering reports via chat. The project utilizes Python, FastAPI, and the A2A standard for agent communication. PRRover accepts A2A JSON-RPC calls at `/a2a/tasks` and supports both blocking and non-blocking modes. Non-blocking requests use Python's `asyncio` to spawn background tasks for long analyses, returning an "accepted" status immediately. Once complete, results are pushed back to Telex via a provided webhook. A2A uses JSON-RPC 2.0, requiring specific request and response formats. The core analysis pipeline includes fast rule-based checks and deeper LLM-powered analysis with Google Gemini 2.0, providing actionable recommendations. FastAPI's asynchronous capabilities are crucial for handling non-blocking flows, ensuring smooth user experience.