Project-onboarding-v0-1 Layer B amendment surfaced from Cycle 5 retrospective: phase 2 entry condition. Layer B says phase 2 is browser-control. Cycle 5 is the natural transition gate. Worth amending Layer B to explicitly state: phase 2 scoping cycle opens when Cycle 5 closes with retrospective shipped, AND phase-2-entry requires sovereign Tier-3 ratification per existing escalation triggers, AND amendment 9a1b1b17 (X-Sixis-Agent header for browser-control attribution) must be promoted from candidate queue before phase 2 work begins.