This action checks if all the commits of the repository follow the Conventional Commits standard.

Basic usage:

- uses: asperan/check-conventional-commits-action@main
  with:
    # Personal access token (PAT) used to fetch the repository.
    token: ${{ github.token }}

Use the number of errors detected by the action:

- uses: asperan/check-conventional-commits-action@main
  id: check-commit
  with:
    token: ${{ github.token }}

- uses: marocchino/sticky-pull-request-comment@v2
  # When the previous steps fails, the workflow would stop. By adding this
  # condition you can continue the execution with the populated error message.
  if: always() && (steps.check-commit.outputs.rows != 0)
  with:
    header: pr-title-lint-error
    message: |
      <<any message you want>>

# Delete a previous comment when the issue has been resolved
- uses: marocchino/sticky-pull-request-comment@v2
  if: ${{ steps.check-commit.outputs.rows == 0 }}
    with:
      header: pr-title-lint-error
      delete: true

1. Be sure you are the only one who will make the changes!
2. In your local copy of the repository, in the faulty branch, run git rebase -i <pull-request-target>; this will open the editor and let you view all the commits between the HEAD of the branch and the destination of the pull-request. In each faulty commit message, change the action to edit and the message to a conventional one; then save and quit from the editor.
3. You probably need to run git rebase --continue, maybe more than one time, surely until you see a message like Successfully rebased and updated refs/heads/<faulty-branch>.
4. If you run git status, it should say that your branch and the remote branch are divergent. This is ok, as you have changed messages.
5. Now you can run git push --force-with-lease, which should not fail (as you are the only one which changed the commits), and the pull request will be updated accordingly.