K3-21 A, red. Round 20 wrote `parent:` on 675 of 710 heading-only sections
and no reader could see it: `okf consume` did not read the key, the payload
did not carry it, the body held no link, and the pointer was a `segment_id`
a reader cannot open without enumerating the bundle.
Held here: a heading-only body carries ONE bundle-relative link to its
enclosing section (SPEC SS 5.1, SS 6.1); an excerpt carries `parent` as the
resolved concept id and title, never the raw id; an unresolvable pointer is
named `parent_unresolved`; a pointer resolves inside its own document; the
checker has 17 rules and refuses a parent a reader cannot follow, with four
known-negatives; the contract and the skill template name the field.
11 of 12 red on e717b1c; the one green is the guard that a payload with no
`parent` meets the rule as before.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
