This Gist is a template for creating a simple Github aciton for cleaning up stale commits.

stale.yaml

# This workflow is used to automaticly close Pull Request and Issues that didn't have any activity on them.
# PR and Issues over 90 days will be mark with stale label and after 14 days of no updates will be deleted.
name: 'Close stale PRs'
on:
  workflow_dispatch:
  schedule:
    - cron: '30 1 * * *'

permissions: 
  pull-requests: write
  issues: write

jobs:
  stale:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/stale@v3
        with:
          stale-issue-message: 'This issue didnt have any activity for the last 90 days, in 14 days it will be deleted'
          stale-pr-message: 'This pull request didnt have any activity for the last 90 days, in 14 days it will be deleted'
          days-before-stale: 60
          days-before-close: 14
          delete-branch: false