D1 caps changelog creation at one per session; D2 widens the Phase-5
sweep to every docs/ file with manifested consolidation commits and
defines the under-25 counting scope. GA-R6 delivered as DRAFT (executable
definition of done; 5/0/6 superseded by the CURRENT-STATE section-5
mechanism). G2 gate row updated same-commit per GA-R1 rule 8.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018ZV3uqyU9oWoFTcwiE4a21