AI-Powered GitHub Commit Reviewer

Overview

Workflow Name : AI-Powered GitHub Commit Reviewer
Author : Akhil
Purpose : This n8n workflow triggers on a GitHub push event, fetches commit diffs, formats them into HTML, runs an AI-powered code review using Groq LLM, and sends a detailed review via email.

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How It Works (Step-by-Step)

1. GitHub Trigger

• Node Type : n8n-nodes-base.githubTrigger
• Purpose : Initiates the workflow on GitHub push events.
• Repo : akhilv77/relevance
• Output : JSON with commit and repo details.

2. Parser

• Node Type : n8n-nodes-base.set
• Purpose : Extracts key info (repo ID, name, commit SHA, file changes).

3. HTTP Request

• Node Type : n8n-nodes-base.httpRequest
• Purpose : Fetches commit diff details using GitHub API.
• Auth : GitHub OAuth2 API.

4. Code (HTML Formatter)

• Node Type : n8n-nodes-base.code
• Purpose : Formats commit info and diffs into styled HTML.
• Output : HTML report of commit details.

5. Groq Chat Model

• Node Type : @n8n/n8n-nodes-langchain.lmChatGroq
• Purpose : Provides the AI model (llama-3.1-8b-instant).

6. Simple Memory

• Node Type : @n8n/n8n-nodes-langchain.memoryBufferWindow
• Purpose : Maintains memory context for AI agent.

7. AI Agent

• Node Type : @n8n/n8n-nodes-langchain.agent
• Purpose : Executes AI-based code review.
• Prompt : Reviews for bugs, style, grammar, and security. Outputs styled HTML.

8. Output Parser

• Node Type : n8n-nodes-base.code
• Purpose : Combines commit HTML with AI review into one HTML block.

9. Gmail

• Node Type : n8n-nodes-base.gmail
• Purpose : Sends review report via email.
• Recipient : [email protected]

10. End Workflow

• Node Type : n8n-nodes-base.noOp
• Purpose : Marks the end.

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Customization Tips

• GitHub Trigger : Change repo/owner or trigger events.
• HTTP Request : Modify endpoint to get specific data.
• AI Agent : Update the prompt to focus on different review aspects.
• Groq Model : Swap for other supported LLMs if needed.
• Memory : Use dynamic session key for per-commit reviews.
• Email : Change recipient or email styling.

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Error Handling

Use Error Trigger nodes to handle failures in:

• GitHub API requests
• LLM generation
• Email delivery

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Use Cases

• Instant AI-powered feedback on code pushes.
• Pre-human review suggestions.
• Security and standards enforcement.
• Developer onboarding assistance.

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Required Credentials

Credential	Used By	Notes
GitHub API (ID PSygiwMjdjFDImYb)	GitHub Trigger	PAT with repo and admin:repo_hook
GitHub OAuth2 API	HTTP Request	OAuth2 token with repo scope
Groq - Akhil (ID HJl5cdJzjhf727zW)	Groq Chat Model	API Key from GroqCloud
Gmail OAuth2 - Akhil (ID wqFUFuFpF5eRAp4E)	Gmail	Gmail OAuth2 for sending email

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Final Note

Made with ❤️ using n8n by Akhil.