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archify-vscode-ext/templates/models/arc42-cinema-tickets/decisions/0003-signed-qr-codes.archify-decision
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root-at-skic 0745de822a 0.11.0: arc42 and ArchiMate examples; ref in every diagram kind
Six example models next to the three C4 ones: arc42 (Cinema Tickets, IoT
Telemetry, Team Wiki) by section, ArchiMate (Insurance Claims, HR
Onboarding, Logistics Tracking) by layer, each validated with 0 errors and
0 warnings. resolveRefs and the editor schemas now take ref: in workflow
and dataflow nodes, sequence participants and lifecycle states, as the
skill already did. Example tests check each framework's folders.
2026-11-08 22:54:23 +02:00

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schema_version: 1
decision:
id: signed-qr-codes
title: Signed QR codes checked offline at the door
status: accepted
date: 2026-10-06
elements: [ticketing, scanner]
diagrams: [0600-runtime/check-in.archify]
context: >
Cinema Wi-Fi drops when a full hall arrives. A scanner that
needs the server for every ticket stops the queue.
decision: >
The Ticket Service signs each QR payload (ticket id, show,
seat) with a private key. The scanner app verifies it with the
public key and queues check-ins until it is online again.
consequences: >
A forwarded ticket scans twice while offline; the second scan
is flagged when the queue syncs. Key rotation needs an app
update window.