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Review professional article drafts, especially abstracts, motivation, intros, case-driven technical essays, and method writeups. Use when the user wants feedback on structure, argument consistency, professional rigor, or revision principles for ongoing article review.

Design Andrew-style API and distributed-system contracts from domain lifecycle, message flow, and correctness guarantees. Use when Codex needs state-machine-driven API design, contract-first or API-first planning, service-to-service messaging, retry and idempotency design, queue or scheduler workflows, worker isolation choices, or measurable validation of ordering, latency, and duplicate-execution tradeoffs.

Build Andrew-style architecture foundations before domain-specific design: frame the real problem, extract stable abstractions, choose data and storage shapes from dominant constraints, validate ideas with measurable POCs, and turn architecture topics into deliberate-practice loops. Use when the task is cross-domain architecture thinking, abstraction-first modeling, storage tradeoff analysis, executable design validation, or architecture skill-building.

Plan Andrew-style microservice architecture and migration by checking whether microservices truly fit, cutting service boundaries around real business responsibilities, evolving systems incrementally instead of rewriting, and engineering platform, runtime, and delivery capabilities as first-class architecture. Use when deciding whether to adopt microservices, decomposing a monolith, planning migration, choosing shared infrastructure, containerizing services, or defining the CI/CD and operability baseline needed to run many services safely.

Design Andrew-style authentication, authorization, permission, and trust-boundary mechanisms for applications and APIs. Use when Codex needs security-by-design thinking, token or key-based trust models, permission-system architecture, RBAC or policy design, anti-replay and signature choices, multi-tenant authorization boundaries, or operational enforcement and audit considerations.

Design Andrew-style service reliability mechanisms from explicit SLOs, bottleneck analysis, load shaping, queue fairness, and operable metrics. Use when Codex needs to design service-quality guarantees, SLI/SLO decomposition, admission control, throttling, queue or lineup mechanisms, workload separation, observability-by-design, or operational controls that protect user experience under load.