Automated AI Code Review for GitLab Merge Requests
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Streamline your development process with this n8n workflow that automates code reviews for GitLab Merge Requests. Leveraging AI, it provides instant, structured feedback on code changes, enhancing code quality and accelerating review cycles.
About This Workflow
This powerful n8n workflow integrates directly with GitLab to revolutionize your code review process. Triggered by a webhook, it intelligently fetches merge request changes, filters for relevant code modifications, and then sends specific diffs to an advanced OpenAI language model (gpt-4o-mini). The AI acts as a senior programming expert, providing a clear 'accept' or 'reject' decision, a numerical 'Change Score', and detailed, actionable recommendations in a rigorous Markdown format. This automation drastically reduces manual review time, ensures consistent code quality, and empowers developers with immediate, AI-driven insights.
Key Features
- GitLab Integration: Seamlessly connect to your GitLab repositories to monitor merge requests and retrieve code changes.
- Intelligent Diff Parsing: Automatically extracts and analyzes code differences, focusing only on relevant modifications while skipping renamed or deleted files.
- AI-Powered Review: Utilizes OpenAI's
gpt-4o-minimodel to provide expert-level code analysis and feedback. - Customizable AI Prompts: Tailor the AI's review criteria and persona to align with your team's coding standards and best practices.
- Structured Feedback: Receive clear review decisions (Accept/Reject), a numeric 'Change Score' (0-100), and detailed recommendations in Markdown.
How To Use
- Set up Webhook: Configure a GitLab webhook to trigger this workflow on relevant Merge Request events (e.g., comments, MR updates).
- Replace GitLab Credentials: Update the
Get Changesnode (and potentially others) with your GitLab URL and a validPRIVATE-TOKENfor API access, as indicated by the sticky notes. - Customize Trigger Words: In the
Need Reviewnode, adjust the condition to define specific keywords or conditions in merge request comments that should trigger an AI review. - Edit AI Prompt: Modify the
Basic LLM Chainnode's prompt to refine the AI's instructions, persona, and desired output format to match your specific review guidelines. - Configure OpenAI API Key: Ensure your
OpenAI Chat Modelnode is connected to a valid OpenAI API credential.
Apps Used
Workflow JSON
{
"id": "a86d192d-29fe-4709-9e4d-c21e14c14658",
"name": "Automated AI Code Review for GitLab Merge Requests",
"nodes": 18,
"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.
Get This Workflow
ID: a86d192d-29fe...
About the Author
Crypto_Watcher
Web3 Developer
Automated trading bots and blockchain monitoring workflows.
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