We also have an archive of the rooms using slackarchive: https://babeljs.slackarchive.io/development/
New notes will be added as pull requests so you will be notified of them if you watch the repo.
You can comment on the pull requests to discuss the notes, or raise issues if you would like to ask for a clarification!
Basically copied from reactjs/core-notes
Old Notes (2016)
When we didn't have "meetings", but just notes to discuss development. These notes started July 30, 2016.