Orchestrator — Spec-Driven Development (SDD) Router

A router: it independently classifies complexity and risk, then picks the stage, then you load that stage skill. It holds no stage content itself. It owns three single-home files every stage points to:

• references/risk-routing.md — authoritative S0-S3 complexity and R0-R3 risk classification
• references/size-tiers.md — compatibility T0-T3 reviewer depths and budgets
• references/lanes.md — which model builds and which review (the only place model names live)
• references/coding-principles.md — how code gets written (think first, simplicity, surgical changes, goal-driven), the S0/S1 plan format, the unreachable-scenario definition, and the builder block every brief carries

The chain diagram lives in references/flow-map.md.

When to use