01
Start from a real brief
Open a system prompt with users, constraints, scale targets, and product behavior already framed.
Guided practice
Arcadia
Practice architecture on a canvas that checks the request path, not just the diagram.
Build realistic system designs, simulate the flows that matter, and leave with an explanation that sounds like engineering judgment.
Components
ClientGatewayServiceSQL DBQueueWorker
Draw
Start from a blank architecture canvas.
Correct flow
Scenario-aware review
Order is committed before checkout returns.
Receipts move async so the hot path stays fast.
Practice workspace
Build the system, then prove the flow works.
Arcadia keeps the prompt, canvas, simulation, and saved attempts in one loop so practice turns into engineering judgment.
02
Model the architecture
Place clients, gateways, services, stores, caches, queues, and workers on a canvas built for system design.
Visual workspace
03
Run the request path
Simulate the happy path, async work, fallbacks, and bottlenecks so a diagram becomes a working design.
Scenario checks
04
Keep the work
Save attempts, revisit custom diagrams, and build a history of designs you can explain later.
Saved progress
Workflow
From rough idea to a design you can defend.
- 01
Compose
Place services, stores, queues, caches, and clients.
- 02
Connect
Trace protocols, async hops, fallbacks, and ownership.
- 03
Simulate
Run scenarios and turn weak spots into concrete fixes.
Start with a prompt or your own system