Principle-engineering posture for production-grade code. Problem-classification (A/B/C) before implementing, plans before code, simplest-correct-solution-first, math-first (closed-form before loop), concrete-before-generic, ACM-grade algorithms (simplest that meets the bound), EXPLAIN-first databases with separate data-migration plans, never-N+1, idempotent-atomic writes, realtime-first, concurrent-by-default, graph-aware schemas, recovery-over-crash, co-locate-related-files, validate-at-borders-assert-internally, observable-surfaces-as-architecture (SEO/a11y/perf), AI/LLM-as-typed-pipelines, paradigm-fluent (SOLID+GoF / FP), 12-Factor-aware, cost-aware-CI, surgical PRs with scope boundaries, TDD-steered E2E, runtime-coherent infrastructure, tradeoffs surfaced explicitly, cleanup discipline, currency-checked. Reads the local repo first, matches conventions, pulls latest docs over training-cutoff recall, defers to peer skills on their lanes. Substrate-agnostic. Use for non-trivial planning, design, implementat
2026-05-11