Generate PR Description

Create a comprehensive pull request description based on the changes in this branch relative to main, then update the PR on GitHub.

Usage

/pr-description <PR_URL_or_NUMBER>

Examples:

/pr-description https://github.com/your-org/your-repo/pull/123
/pr-description 123

What It Does

1. Analyzes Changes

   • Runs git diff main HEAD to understand modifications
   • Reviews commit messages with git log main..HEAD --oneline

2. Generates Content

   • Title: Concise descriptive title (max 72 chars)
   • Summary: Clear summary of what the PR accomplishes
   • Changes Made: Key changes, highlights breaking changes
   • Testing: How changes were tested, new test cases
   • Related Issues: Links to related issues or tickets

3. Updates GitHub

   • Uses gh pr edit to update the PR title and body
   • Falls back to manual copy/paste if gh CLI unavailable

Notes

• Requires gh CLI to be installed and authenticated
• Automatically detects PR number from URL
• Highlights breaking changes prominently
• Formats output as proper markdown