The Decision Archive
how teams stop relitigating the same calls every quarter
Every team has the same conversation twice a year. "Should we use Postgres or Mongo?" "Why did we pick this vendor again?" "Wait — didn't we already decide that?" The decision was made; the reason evaporated; nobody on the team can find the receipt. So you re-do the discovery, re-have the meeting, re-decide.
The Decision Archive is a markdown discipline that fixes it: one record per decision, append-only, written in a shape your AI can read. When someone asks "have we considered X?" the AI answers from decisions.md — with status, alternatives, and why-this-one — in five seconds.
This module is T02 of the Team Brain track. T01 (the Shared Folder) is the prerequisite — that's where decisions.md lives.