Compact Decisions

Run this cleanup periodically after shipped work accumulates. Shorten the records without changing the decisions.

Do not invent decisions

Keep a current decision file unless another file conflicts with it. Do not reconstruct how or when it was adopted.
Move a choice into docs/decisions/, or choose between conflicting files, only if the user confirmed it or explicitly delegated that kind of decision.
Use shipped code only to spot outdated documentation. Code and silence do not prove intent. Do not change code during this cleanup.
If files disagree and the user's intent is unclear, leave them unchanged and ask the exact question needed to resolve them. Never choose based on which file is newer, what the code does, or the user's silence.