AI-Powered GitHub Pull Request Code Reviewer
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This n8n workflow automates your code review process by leveraging AI. It triggers on GitHub Pull Request events, intelligently extracts code diffs, uses an OpenAI model to generate detailed review comments, and posts them directly back to GitHub, significantly enhancing development efficiency.
About This Workflow
Streamline your development lifecycle with this powerful AI-driven code review workflow. Automatically triggered by new or updated GitHub Pull Requests, the system intelligently extracts code changes and constructs a precise prompt for an OpenAI Large Language Model. Acting as a "senior iOS developer," the AI meticulously reviews the diffs, generating inline comments for relevant lines of code. This not only accelerates the review process but also ensures consistent application of best practices. Finally, the workflow posts these AI-generated insights as a review comment on your PR and applies a 'ReviewedByAI' label for clear visibility, allowing your team to focus on strategic human reviews.
Key Features
- Automated PR Monitoring: Instantly triggers on any GitHub Pull Request activity (creation, update).
- Dynamic Code Diff Extraction: Automatically fetches and formats code changes from PRs for AI analysis.
- Intelligent AI Code Review: Utilizes
gpt-4o-minito act as a senior developer, providing insightful, line-by-line review comments. - Seamless GitHub Integration: Posts AI-generated review comments directly to the relevant Pull Request.
- Automated PR Labeling: Adds a "ReviewedByAI" label for easy tracking and identification of automated reviews.
- Customizable AI Persona: Easily adapt the AI prompt to define specific roles (e.g., security expert, junior dev mentor) and review criteria.
- Extensible Best Practices: Integrate with external tools like Google Sheets to provide additional context or log AI findings against your team's code standards.
How To Use
- Configure GitHub Trigger: Authenticate with your GitHub account (OAuth2) and specify the repository and events (e.g.,
pull_request) to monitor. - Set up OpenAI Chat Model: Provide your OpenAI API credentials and select your preferred
gpt-4o-minimodel or another suitable LLM. - Customize AI Prompt: Modify the "Create target Prompt from PR Diffs" Code node to fine-tune the AI's persona, review instructions, and desired output format.
- Configure GitHub Actions: Authenticate the "GitHub Robot" and "Add Label to PR" nodes with your GitHub API credentials, ensuring they have permissions to comment and label PRs in your chosen repository.
- Activate Workflow: Save and activate the workflow to begin automating your code reviews.
Apps Used
Workflow JSON
{
"id": "6abeb4f7-edea-478e-a2e5-1897914a12fb",
"name": "AI-Powered GitHub Pull Request Code Reviewer",
"nodes": 27,
"category": "DevOps",
"status": "active",
"version": "1.0.0"
}Note: This is a sample preview. The full workflow JSON contains node configurations, credentials placeholders, and execution logic.
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ID: 6abeb4f7-edea...
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