Create a feature in the Coherence UI by clicking the "New Feature" button
Complete the form in the modal.
Create a workspace on the feature's detail page
Once the workspace has been created, click on the Start Workspace button. Your repo will automatically be cloned into your new workspace.
Edit code. Commit to git using either the terminal built into VSCode or via the VSCode UI in the workspace.
Push the code to github (your credentials will be automatically loaded from your Coherence profile) with
git push or use the VSCode UI.
From GitHub's UI, create a PR and review it just like you normally would.