Chair · backendThe Backend ChairMerges the backend seats into one ruling and one prompt
API ContractRoute shape, verbs, status codes, versioning, idempotency
Data ModelTables, keys, indexes, migrations, what the schema forbids
Auth and SessionsWho is allowed in, who is allowed what, and how it fails
State and ConsistencyRaces, concurrent writers, transactions, stale writes
IntegrationsThird-party APIs, webhooks, retries, rate limits, timeouts
Background WorkQueues, crons, long jobs, and finishing what was started
Chair · interfaceThe Interface ChairMerges the interface seats into one ruling and one prompt
Interface StructureScreens, routing, and where client state actually lives
InteractionForms, taps, latency, optimistic updates, error surfaces
Mobile and ViewportThe 390px phone as the real device, not the small case
AccessibilitySemantics, keyboard, focus, contrast, screen readers
Client PerformancePayload, render cost, caching, offline, install
Visual SystemTokens, type, hierarchy, and one language across screens
Chair · platformThe Platform ChairMerges the platform seats into one ruling and one prompt
Deploy PathHow code gets to production and how it comes back
Edge RuntimeServerless limits: CPU, wall clock, subrequests, cold start
Storage and CostWhich store, what it costs, and where the bill surprises
ObservabilityLogs, health checks, and knowing it broke before a user does
Networking and DNSDomains, TLS, routes, proxies, tunnels
Secrets and ConfigWhat is a secret, where it lives, how it rotates
Chair · modelsThe Model ChairMerges the AI seats into one ruling and one prompt
Prompt ArchitectureSystem prompts, structure, and output you can rely on
Model RoutingWhich model, what it costs, how slow, and the fallback
Agent OrchestrationHow many agents, in what order, and who reads whom
Retrieval and ContextWhat the model is given, and whether it is grounded
EvaluationHow you know the model output got better or worse
Tool UseFunction calling, tool schemas, sandboxes, blast radius
Chair · assuranceThe Assurance ChairMerges the quality seats into one ruling and one prompt
Test StrategyWhat to test, at what layer, and what to skip
Security ReviewAuthorization holes, injection, exposure, dependencies
Failure ModesWhat breaks first, how it degrades, what the user sees
Data IntegrityValidation at the boundary, and never losing what was written
Performance ProfilingMeasure, find the real hot path, then change one thing
Release ReadinessThe honest checklist between "it works" and "it shipped"
