A GitHub Action that automatically posts a migration checklist as a comment on pull requests that contain database migration files.

This action monitors pull requests for changes to database migration files (specifically files in db/migrate directories). When migrations are detected, it posts a comprehensive checklist comment to guide developers through the migration deployment process.

1. The action examines all files changed in a pull request
2. If any files in db/migrate directories are detected, it triggers the checklist posting
3. The action checks if a migration checklist comment has already been posted to avoid duplicates
4. If no previous comment exists, it posts the appropriate checklist as a comment on the pull request

• action.yml: GitHub Action configuration defining the action name, inputs, and Docker runtime
• Dockerfile: Container setup with necessary tools (curl, jq) for API interactions
• entrypoint.sh: Main script that handles PR file detection, comment checking, and checklist posting
• checklists/: Directory containing checklist templates
  • default.md: Default migration checklist with comprehensive steps for database migrations

• Automatic detection of database migration files in pull requests
• Prevention of duplicate checklist comments
• Support for repository-specific checklists (falls back to default if not found)
• Uses GitHub API for PR interaction with proper authentication

• token: GitHub token for API authentication (required)