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Layered system separation, state encapsulation, and domain modularity.
TLS 1.3 encryption, CSP headers, rate-limiting, and input sanitization.
Sub-100ms API latency targets, server-side caching, and bundle optimization.
Automated test suites, preview environments, and zero-downtime production releases.
REST and GraphQL contract definitions, error structures, and rate limits.
WCAG 2.1 AA compliance, keyboard navigation, and ARIA attributes.
Version history, release notes, and operational system upgrades.