> ## Documentation Index > Fetch the complete documentation index at: https://docs.prflow.dev/llms.txt > Use this file to discover all available pages before exploring further. # Channel routing > Map repositories to Slack channels: pick which GitLab or GitHub repositories PRFlow watches and where each one posts. PRFlow routes every notification through a mapping: a repository posts to one Slack channel. Mappings are managed from the dashboard at [app.prflow.dev](https://app.prflow.dev), and you can point several repositories at the same channel. ## 1. Click Add Repository Connect your source provider (GitLab or GitHub) and Slack first; the connections strip on the overview page shows their status. Once both are connected, click **Add Repository**. The PRFlow overview page with the Add Repository button ## 2. Select projects Search the list and tick the projects you want PRFlow to watch. The list covers every project your connection can access and marks the ones already mapped; you can select several at once. The Add repositories dialog with a searchable, multi-select project list ## 3. Select a Slack channel Pick the channel the selected projects will post to, then save. The channel picker listing public channels and one private channel PRFlow lists public channels, plus private channels it has been added to. If a private channel is missing, invite the bot from Slack with `/invite @PRFlow`, then refresh the page. That's it: new PR activity in the mapped repositories now posts to the channel. To change a mapping later, click the repository's channel on the dashboard; the same editor also holds the channel's [scheduled digest](/pr-digest) settings.