Building a Code Review Bot with Claude API and GitHub Actions

Building a Code Review Bot with Claude API and GitHub Actions Automate your code reviews with AI-powered analysis that catches real bugs, security issues, and style violations — directly in your pull requests. Every engineering team faces the same bottleneck: code reviews take time, reviewers get fatigued, and important issues slip through. What if an AI assistant could handle the first pass — flagging security vulnerabilities, catching logic errors, and enforcing style conventions — before a human even opens the PR? In this article, you'll build a production-ready code review bot that integrates Claude's API with GitHub Actions. It will automatically analyze pull request diffs, post structured comments, and help your team ship higher-quality code faster. What We're Building By the end of this tutorial, you'll have: A GitHub Action that triggers on every pull request A Node.js script that fetches the PR diff and sends it to Claude for analysis Structured review output posted as GitHub