Kudzu 0.8.55 replaces site-wide runtime specialization with deterministic capability families. Equal standalone CapabilityIR signatures share one co-located runtime family, different signatures remain isolated, and each enhanced-navigation group unions its routes at one ESM singleton boundary for persistent layout state and lifecycle ownership. Route-specific parameter, effect, and native entries import their assigned family directly; static routes remain zero JavaScript. Artifact report v2 records exact route signatures, assigned emitted families, handler and Worker graphs, styles, and shared chunks without adding a runtime loader, hydration, VDOM, or SPA router.