I have an action created so that, when a Pull Request is merged, it activates and cleans up the files and uploads them back to the main branch. This is my action.yml:

permissions:
  contents: write
  actions: read

on:
  pull_request:
    types: [closed]
    branches:
      - main

jobs:
  archive-and-reset:
    if: github.event.pull_request.merged == true && startsWith(github.head_ref, 'code/PH-')
    runs-on: ubuntu-latest
    name: Archive Experiment and Reset src
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: action execution
        uses: myprivaterepo/[email protected]
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

For a few days this action has failed because it can’t push to the main branch:

0s
Run myprivaterepo/[email protected]
Error: Command failed: git push
remote: error: GH006: Protected branch update failed for refs/heads/main.        
remote: error: Required status check "Archive Experiment and Reset src" is expected.        
To https://github.com/myprivaterepo/repo-client-testing
 ! [remote rejected] main -> main (protected branch hook declined)
error: failed to push some refs to 'https://github.com/myprivaterepo/repo-client-testing'

Does anyone know if GitHub is protecting the main branch in a hidden way? I don’t have any Rulesets assigned to the main branch.