Decision memory
Keep why a date moved or why a scope cut happened.
Project managers
Dossier keeps the human and decision context that project tools usually miss: why a tradeoff happened, who owns the loose end, and what someone said they would handle.

Use it for
Keep why a date moved or why a scope cut happened.
Remember stakeholder concerns and communication preferences.
Capture small promises before they become status-meeting surprises.
FAQ
No. Keep Jira for the work queue. Use Dossier for context and memory.
Yes, when you brief the reasoning after the meeting.
Brief the messy context once, then ask before the next meeting.