Project-onboarding-v0-1 Layer B amendment surfaced from Cycle 5 retrospective: Cycle 5 input source clarification. Original Layer B framing assumed Cycle 5 retrospective input would come from '≥1 real new project flowing through end-to-end' via wizard usage. Real-session development data (this implementation cycle itself) is also legitimate retrospective input. Layer B should be amended to clarify both sources are valid, with the development-substrate path serving as the bootstrap pattern when no user-facing usage exists yet. Pattern caught when Tommy directed 'keep going' after orchestrator framed Cycle 5 as blocked-on-real-usage.