Candidate Universal Shell amendment surfaced from Cycle 5 retrospective: per-brain pair prompt pattern as universal council-poll standard. Currently implicit standing pattern that the orchestrator can erode (proposed broadcast-prompt switch this session, caught by Tommy citing operational evidence: Deepseek confuses itself as GPT under broadcast). Worth explicit Universal-Shell codification with acceptance criteria for any proposed alternative (must demonstrate role-confusion-resistance equivalent to per-brain-pair before being adopted). Pairs with the Breakdown-Detection self-audit amendment (07342af4) — orchestrator-side proposals to change established patterns must explicitly query 'what failure mode does the current pattern prevent that my change would re-introduce.'