Cody

Cody by CodyLabs is a free, open-source AI-powered code review and summarization tool that integrates seamlessly as a GitHub Action (and GitLab CI/CD pipeline via Cody Pro). When a pull request or merge request is submitted, Cody automatically summarizes the code changes and reviews them with the rigor of a senior software engineer, leveraging leading AI models such as OpenAI GPT-5/GPT-4 and Anthropic Claude. Setup requires no coding experience — developers simply add an API key as a repository secret and drop a workflow file into their repo.