Architecture & Design Models

Structural patterns for resilience and maintainability.

Model	One-Liner
12-Factor App	The portable, scalable cloud-native application checklist
Strangler Fig	Incrementally migrate from legacy by building around it
Circuit Breaker	Fail fast to prevent cascade failures
Bulkhead	Isolate resource pools so one consumer can't sink others
Sidecar Pattern	Attach functionality to a service without modifying it
Event Sourcing	Append-only event log as the source of truth
Idempotency	Safe to retry without side effects

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• Mental Model Library
• Mental Model: 12-Factor App
• Mental Model: Bulkhead
• Mental Model: Circuit Breaker
• Mental Model: Event Sourcing
• Mental Model: Idempotency
• Mental Model: Sidecar Pattern
• Mental Model: Strangler Fig