5.Encoding conventions

• Ordering. The registry order (§4) is the canonical serialization order.
• Serialization. A conforming JSON encoding maps id → value; unknown ids MUST be ignored by consumers (forward compatibility) and SHOULD be logged.
• Interpolation. Between keyframes, continuous dimensions interpolate independently; hyper conditions do not interpolate as values (nearest / hold). A consumer SHOULD engage/release the contact solve smoothly across a keyframe transition (ramp its correction weight), but the condition itself is discrete.
• Missing dimensions. A producer MAY omit dimensions it cannot estimate; consumers MUST substitute the registry default.