# PRFlow > GitLab and GitHub merge request notifications in Slack — one updating message per MR/PR with CI/CD status and threaded comment sync. ## Docs - [Welcome to PRFlow](https://docs.prflow.dev/index.md): Merge request and pull request notifications in Slack, for GitLab and GitHub — one updating message per MR/PR with CI/CD status and threaded comment sync. - [Quickstart](https://docs.prflow.dev/quickstart.md): Connect GitLab or GitHub and Slack, map repositories to channels, and get your first merge request notification in a few minutes. - [MR card states](https://docs.prflow.dev/mr-states.md): What the colored rail on PRFlow's Slack card means: blue, amber, red, green, purple, and grey, state by state. - [Notification rules](https://docs.prflow.dev/channel-routing.md): How PRFlow decides which Slack channel a repository posts to: an ordered list of rules where the first match wins, with specific repositories, wildcard patterns, and a catch-all. - [Comment sync](https://docs.prflow.dev/comment-sync.md): Review comments on GitLab merge requests and GitHub pull requests appear as threaded replies under the Slack notification — new comments post to the thread, edits update in place, and deletions remove the reply. - [Scheduled digest](https://docs.prflow.dev/pr-digest.md): A recurring Slack post that lists a channel's open PRs, grouped by what each one is waiting on. - [GitLab integration](https://docs.prflow.dev/gitlab-integration.md): How PRFlow connects to GitLab, which webhook events and API calls it uses, what it sends to Slack, and exactly what merge request data it handles along the way. - [GitHub integration](https://docs.prflow.dev/github-integration.md): How PRFlow connects to GitHub through a one-click GitHub App — available on the GitHub Marketplace — which pull request events it reacts to, and what it sends to Slack. - [Slack integration](https://docs.prflow.dev/slack-integration.md): How PRFlow connects to Slack, which channels it can post to, the four bot scopes it requests, what data reaches your workspace, and how disconnecting or uninstalling works. - [FAQ](https://docs.prflow.dev/faq.md): Answers to common PRFlow questions — setup and permissions, notifications that didn't arrive, Slack channels and threads, and disconnecting or uninstalling. - [Changelog](https://docs.prflow.dev/changelog.md): New features in PRFlow, week by week.