Three decisioners in Aria Router

When to use semantic YAML vs builtin agent vs AFM-D — shared providers, fail-closed validate, *-auto gold paths.

• When to use semantic YAML vs builtin agent vs AFM-D — shared providers, fail-closed validate, *-auto gold paths.
• Router’s control plane now exposes three parallel decisioners: 1. **semantic** — YAML rules + embeddings for hybrid routing 2. **agent** — builtin agent policy for harder handoffs 3. **afm-d** — typed System One via `aria-engine` Production clients should prefer gold entrypoints ending in `-auto`. Validation remains fail-closed. Read the product deep-dive on [Router](/router).