Tools that have worked in the past for me: - Confluence for long lived documents - JIRA for time boxed groupings of work. - Slack for real time comm if anything arises. - "Culture" and Process Living Document

I ran a team of about 25 in the past and followed the following agile principles to help with alignment: - retrospectives - "sprints" (preference on the 3-4 week range) - Sprint Review

Alignment, while tricky, isn't all that hard so long as processes are evolving from retrospectives and you have a single source of truth for long form documentation.