Automated Code Review & PR Description Workflow

Overview

This workflow integrates AI coding agents into your GitHub PR workflow. Every pull request automatically gets reviewed by AI — catching bugs, suggesting improvements, and generating professional PR descriptions — before human review.

What You’ll Need

• GitHub Copilot or Claude Code — AI code review ($10-20/mo per developer)
• GitHub Actions — CI automation (free for public repos)
• OpenAI API or Anthropic API — For review prompts ($5-20/mo depending on usage)

Step 1: PR Review Agent Setup

Set up a GitHub Action that runs on every PR:

name: AI Code Review
on: [pull_request]
jobs:
  review:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: AI Review
        uses: your-ai-review-action@v1
        with:
          openai-key: ${{ secrets.OPENAI_API_KEY }}

Configure the review prompt:

• Check for: security vulnerabilities, performance issues, missing error handling
• Enforce: code style consistency, test coverage, documentation
• Output: inline comments on the PR diff

Step 2: Automated PR Description Generation

Configure Claude Code or Codex CLI to generate PR descriptions from diffs:

claude-code pr-describe --diff-range main..HEAD

This produces:

• Summary of changes (1-2 sentences)
• Breaking changes (if any)
• Testing instructions
• Screenshots (if UI changes were detected)

Step 3: Bug Detection & Code Quality

Run AI-powered static analysis on every PR:

1. Use Aider’s --lint flag to catch issues before commit
2. Integrate SonarQube or CodeRabbit for deeper analysis
3. Set up custom rules: no hardcoded secrets, proper error handling, type safety

Step 4: Human Review Handoff

When AI review completes, the human reviewer gets:

1. AI-generated summary of all changes
2. Flagged issues (critical, warning, suggestion)
3. Auto-generated test suggestions
4. Security vulnerability scan results

Results

Teams using this workflow report:

• 40% faster PR review cycles
• 60% fewer bugs reaching production
• 90% reduction in trivial review comments (formatting, style)
• Consistent code quality across the codebase

Tools Compared