If you have a pnpm monorepo, you need to know about https://pnpm.io/filtering#--filter-since which allows to run your test/lint/etc on only the packages that have been impacted by changes from master.
I didn't know about this, thanks for posting! We have been using a custom Bash script to retrieve the list of sub-project directories that had been changed since the last commit by recursively scanning its sub-paths and running Git commands to find the last update on each, but this looks much, much better.
