Automated GitHub Code Reviewer
Build a GitHub App or Action that automatically reviews Pull Requests using OpenAI and comments on specific lines of code.
The Problem
Build a GitHub App or Action that automatically reviews Pull Requests using OpenAI and comments on specific lines of code.
Real-World Use Case
Build a GitHub App or Action that automatically reviews Pull Requests using OpenAI and comments on specific lines of code.
Technology Stack
Node.js
Prerequisite
GitHub API
Prerequisite
OpenAI
Prerequisite
Architecture & Design
Folder Structure
action/
├── index.js
└── action.ymlStep-by-Step Implementation
Get PR diff
Set up a GitHub Action repository.
// GitHub Action logicCode Explanation
Implementation step
Filter out package-lock.json
Use @actions/github to get the context and octokit instance.
// GitHub Action logicCode Explanation
Implementation step
Send diff to AI
Runs automatically on PR creation.
// GitHub Action logicCode Explanation
Implementation step
Post comment via Octokit
Ignore very large diffs to save API costs.
// GitHub Action logicCode Explanation
Implementation step
Common Errors
Diffs can be huge. Chunk them or ignore non-source files.
Security & Performance
Open a PR with a bug
Check if AI comments on it
Only review files that have 'src/' in the path
Interview Questions
Q: Can it fix code?
A: Yes, you can have it suggest the replacement code block.