GitHub doesn't provide a built-in way to send notifications if the fields of the project are missing after it is closed. This GitHub Action aims to address this by allowing you to identify the missing information within a central GitHub project.

This GitHub Action allows you to identify missing fields in a central GitHub project on closed issues. If at least one of the fields are missing, then the assignees of the issue will be informed via comment to fill all the required fields for the project.

Before you can start using this GitHub Action, you'll need to ensure you have the following:

1. A GitHub repository where you want to enable this action.
2. A GitHub project board with custom "Status" field, "Due Date", "Time Spent", "Release", "Estimate", "Priority", "Size", and "Week" added.
3. Status field, Release field, Priority field and Size fields should be "Single select" types, "Due Date" field should be "Date" type, "Time Spent" and "Estimate" should be "Text" type and "Week" should be "Iteration" type.
4. A Token (Classic) with permissions to repo:*, read:user, user:email, read:project

To set up missing fields comment notifications, you'll need to create or update a GitHub Actions workflow in your repository. Below is an example of a workflow YAML file:

name: Notify for missing fields

# Runs every minute
on:
  schedule:
    - cron: '* * * * *'
  workflow_dispatch:

jobs:
  notify_for_missing_fields:
    runs-on: self-hosted

    steps:
      # Checkout the code to be used by runner
      - name: Checkout code
        uses: actions/checkout@v3


      # Check for missing fields
      - name: Check for missing fields
        uses: emily-lambrou/closed_issues_without_required_info@v1.3
        with:
          dry_run: ${{ vars.DRY_RUN }}           
          gh_token: ${{ secrets.GH_TOKEN }}      
          project_number: ${{ vars.PROJECT_NUMBER }} 
          enterprise_github: 'True'
          repository_owner_type: organization