New: PHASE9_1_STRIPE_TEST_VALIDATION.md — baseline verification, the exact Stripe-credential
search performed (none found), the Stripe architecture review (dynamic price_data, unchanged),
what was proven vs. blocked per the mission's own step list, and the live-mode readiness
checklist. Updated: STRIPE_INTEGRATION_RUNBOOK.md and WINTER_BREAK_LAUNCH_CHECKLIST.md to point
at the new opt-in test and the blocked status. PHASE9_COMMERCE_AND_LAUNCH.md gets a short
addendum. No application code changed this phase — no genuine defect was exposed without real
Stripe traffic, so no regression rerun was required.