We actually automated a huge chunk of this using our CI/CD pipeline and GitHub Copilot. We set up a rule that generates automated PR summaries based on the git diff. It gives team members a clear, high-level overview of what changed without forcing the author to spend 15 minutes typing it out. For internal team knowledge, we pair that with a strict Architecture Decision Record (ADR) template—just a simple, 5-line markdown file for any major technical pivot.