★ Final capstone · after Module 15 · the whole diagram
Read a complete technical system
This is the whole system, the four quadrants you conquered, wired together. The ten tasks that define “1” run as four relays and a finale: trace it, stock it, hold it, run it. The regrouping is why the task numbers arrive out of order. You’ve been preparing for this since “what is technology actually made of?”
Fig. 1 — the complete system · relay A: trace it0 / 10 tasks
Task 1 — Trace a user request: Erik taps “Place order” on the mobile app. Tap the boxes in the order his request visits them.
Quadrants A–D, assembled
↓ HTTPS · quadrant A: the request path ↓
↓
↓ quadrant B: the data half · quadrant C: the async spine ↓
— quadrant D: the delivery & operations ring, wrapped around everything —
Ten tasks, four relays, one diagram. The brief sits above the figure. Tap the first box Erik's order touches.