1. Abstraction & Encapsulation advanced

    A metadata-driven API layer generates queries over a customer's database. A customer writes a deeply nested query that produces a catastrophic join. Is that an abstraction failure, and what should the design do about it?

    2 min answer abstractionhasuragraphqlleaky-abstraction
  2. Abstraction & Encapsulation advanced

    A team proposes wrapping every cloud provider SDK behind an internal abstraction so the company could migrate providers later. Evaluate the proposal.

    2 min answer abstractionportabilitytradeoffsdropbox
  3. Abstraction & Encapsulation advanced

    Design the abstraction boundary for a "vote" on a large discussion platform where a handful of threads receive an enormous share of all votes. What should the interface promise, what must it hide, and what must it refuse to hide?

    2 min answer abstractionencapsulationhot-keysreddit
  4. Abstraction Level Choice advanced

    A platform must choose how much of the underlying infrastructure to abstract. What decides the level?

    2 min answer abstractionescape-hatchleaky-abstractionsplatform
  5. Abstraction Level Choice advanced

    A platform team must decide how much to abstract the underlying infrastructure. What goes wrong at each extreme, and how do you choose?

    2 min answer platformabstractionleakyescape-hatch
  6. Abstraction Level Choice advanced

    An internal platform must decide how much of the underlying infrastructure to hide. What determines the right abstraction level, and what happens at each extreme?

    2 min answer freshworksabstractionplatformescape-hatch
  7. Abstraction Level Choice advanced

    Your platform abstracts Kubernetes entirely — teams write a short manifest and everything is generated. Now every production incident escalates to the platform team. What is happening?

    2 min answer platformabstractionoperations
  8. Accessibility Architecture advanced

    Six weeks before launch, an accessibility audit returns 200 issues. The team's automated checks were green. Why, and what do you do?

    2 min answer accessibilitytestingcompliancefrontend
  9. Accessibility Architecture advanced

    Where should accessibility live architecturally so it is not a remediation project every year?

    1 min answer accessibilitydesign-systemtestinggovernance
  10. Agent Architectures advanced

    A platform builds an agent that plans and executes multi-step tasks against business systems. Which architectural constraints are non-negotiable?

    2 min answer agentsboundsauthorisationidempotency
  11. Agent Architectures advanced

    A team is building an agent that plans and executes multi-step tasks. What architectural bounds must exist, and what usually goes wrong?

    2 min answer modalagentsboundstools
  12. Agent Architectures advanced

    An agent that researches and summarises occasionally runs for 40 minutes and costs £30 for one request. How do you contain it?

    2 min answer agentscostcontrol