Karpathy-style compressed spec. Read once, execute against. Deterministic by default; testable by construction.
Tiered knowledge graph where JSON is truth, wiki is a pure function of JSON, rollups splice mechanically, retrieval traverses by rule, and an Opus-led audit keeps coherence as the graph grows. Every non-deterministic surface (LLM calls) is bounded, logged, and replayable. Tier slots exist from day one; deployments activate slots, never add them. Solo and enterprise run the same architecture at different activation levels.