Sequence Diagram
4/19/2026
This sequence diagram is used to detail the exact request/response flow for a browser login that requires TOTP-based MFA, including challenge creation and session issuance. It helps teams verify responsibilities and data passed between the Browser, Identity Service, TOTP App, and Session Store—from POST /login through creating a pending mfa_challenge, submitting /mfa/totp, validating the code, and returning Set-Cookie session_id. Backend engineers, security engineers, and QA use it to implement, test, and troubles...
sequence diagramMFATOTPauthenticationsession management
Sequence Diagram
4/18/2026
This sequence diagram is used to map the checkout path from customer submission through cart validation, card charging, failure handling, inventory reservation, and receipt delivery. It helps teams verify order of operations, error recovery with a retry screen after a failed charge, and service dependencies between Checkout, Payment Gateway, Inventory Service, and Email Service. Product managers, engineers, QA analysts, and solution architects would use it.
sequence diagramcheckout flowpayment retryinventory reservereceipt email