update-md-date.yml

name: Update Markdown Date

on:
  schedule:
    - cron: '0 4 * * *'
  workflow_dispatch:

permissions:
  contents: write

jobs:
  update-date:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Update README dates
        run: |
          today="$(date -u +%Y-%m-%d)"

          if [[ ! -f README.md ]]; then
            echo "README.md not found; nothing to update"
            exit 0
          fi

          sed -E -i "s/^Last updated: .*/Last updated: ${today}/" README.md

      - name: Commit date changes
        run: |
          if git diff --quiet; then
            echo "No date change required"
            exit 0
          fi
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
          git add README.md
          git commit -m "docs: update last updated date"
          git push