The PM breaks down the work and we talk about new items as a team weekly, I (or devs) break down purely engineering work. The board is the status - its in prog

The PM breaks down the work and we talk about new items as a team weekly, I (or devs) break down purely engineering work. The board is the status - its in progress, code review or getting tested. There are discussions on things as people work them - that's the small "a" agile practice of "individuals and interactions over processes and tools". Let those minor details get figured out as you work it rather than have everything planned, documented, etc.