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5 plans across 5 waves covering AUTH-01..08, SEC-01..03/05..07, ADMIN-01..05/07. Includes security hardening (Origin validation, per-account rate limiting, TOTP replay prevention, refresh token family revocation with security alert), TOTP + backup code login, and admin panel frontend. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>