MatrixEntry
One fabric's row in the renderMatrix capability matrix.
A fabric declares its SeamCapabilities, and — for every flag it flips to false — a tracking URL in gaps keyed by the capability's canonical name (see SeamCapabilities.falseFlags). This mirrors the fabric's own capabilityGaps(), so the same map that satisfies SeamConformanceSuite.everyFalseCapabilityDeclaresAGap renders here.
Properties
the declared behaviour against the Seam contract.
for a meshDelivery = true fabric, WHY the flag is trusted: a MeshConformanceSuite subclass name that exercises N-peer coverage, or an explicit 2-peer vacuity note (SeamConformanceSuite is fixed at two Looms by ADR-001, so 3-peer mesh coverage cannot live there). Required (non-blank) when meshDelivery = true; null otherwise.