Add instructions to README

README.md

@@ -7,3 +7,11 @@ This is the repo for the Positron documentation site. This site is built with [Q
 ## Reporting issues
 
 We currently use the issue tracker for [Positron](https://github.com/posit-dev/positron). Please report documentation bugs and feature requests at <https://github.com/posit-dev/positron/issues>.
+
+## Linting
+
+This project uses [Vale](https://vale.sh/docs/) for automated linting and compliance with the Posit style guide. Vale runs [via GH action on PRs](https://github.com/posit-dev/positron-docs/actions/workflows/lint.yml), but you can also run it locally before you submit a PR. 
+
+- [Install Vale](https://vale.sh/docs/vale-cli/installation/) locally.
+- Use `quarto render` to generate the HTML that can be linted.
+- Use `vale _site/` to lint the HTML generated by Quarto.