This GitHub Action takes changes from the working directory (using git diff) and applies them as suggested changes in a pull request review. This can be useful after running a linter or formatter that automatically makes fixes for you.

• Gives contributors an opportunity to review and accept automated changes
• Enables semi-automated changes to pull requests without the needing to use a personal access token (PAT) or GitHub App installation token to trigger workflow runs

You can use this action in an existing workflow and have it run after a linter or formatter step. For example, if you have a workflow that runs markdownlint on all Markdown files in a pull request, you can use this action to suggest changes to the pull request after markdownlint has run.

name: 'markdownlint'

on:
  pull_request:
    paths: ['**/*.md']

permissions:
  contents: read
  pull-requests: write

jobs:
  lint:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: DavidAnson/markdownlint-cli2-action@v15
        with:
          fix: true
          globs: '**/*.md'
      - uses: parkerbxyz/suggest-changes@v1
        with:
          comment: 'Please commit the suggested changes from markdownlint.'

Here is what an automated pull request review with suggested changes would look like using the workflow configuration above: