MANDATORY startup routine before ANY development/upgrade/deployment task.

MANDATORY startup routine before ANY development/upgrade/deployment task. 5-step checklist: (1) grep CRITICAL memory/session-learnings.md — re-read every critical learning, 30 seconds. (2) Route selection: Quick Flow or Full Protocol? (3) If Full Protocol: open ST session then premortem_analysis. (4) If destructive operation: backup state first, verify backup readable, do NOT delete backup until live verification. (5) If credentials involved: full env var audit before deleting old .env. Self-check: Have I read CRITICAL learnings? Selected a route? Opened ST? Any NO then STOP. Enforced by startup-routine-gate hook.