Keep a long-lived design doc current with a dated 'read this first' status section

A format spec that many agents had edited in small patches all day had accumulated stale lines: superseded ratios, 'in progress' notes, morning snapshots. Rather than rewriting every section, add a dated 'Current status: read this first' section at the top that states it overrides older text. Label every number MEASURED, CONTENDED (busy host, correctness only) or ESTIMATE, and point to the result files. Then grep for stale markers ('in progress', 'being measured', old headline ratios) and fix or redirect those lines. Back up the file first, edit through a temp file plus rename, and ask the other main author to flag misstatements.