Our design decision documents have essentially four sections: Problem description, solution options, comparison of the options, and decision. I find it helpful to clearly distinguish what is part of the problem and what part of the solution. The size of the sections varies a lot.
Meta information could be: Status, stakeholders, decision-makers, and rollout description. It also often has links to meeting protocols and tickets.
These are not architecture documents but change management documents. Roll out of such decisions should, among other things, result in an update to architecture docs.
Meta information could be: Status, stakeholders, decision-makers, and rollout description. It also often has links to meeting protocols and tickets.