Handbook-first means that when you have a new idea, a new process, an update to a process, a change in your team, etc you document it in the Handbook first. For example, when a new staff member joins us, they should be added to your team's page before their first day. Another example is if you've created a new Jira process - first document it in the Handbook and then announce it to your team/the company. This allows you to find blindspots and also means that people can go to the relevant page immediately after the announcement to read more.