ReadonlybodyThe text the harness delivers, frontmatter removed.
ReadonlynameThe name a setting must spell, or null when the harness cannot tell.
ReadonlypathRelative to the directory the caller scanned (a bundle), /-separated,
exactly as the caller's file map keyed it. A plain string by the same
contract as every scan-core path; Bundle.scanned in frame.ts gives it
a frame. Not the BundlePath brand: that type is internal and must not
reach this public interface.
One style, read by its harness's rules.