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feat(spec): the customizations read's contributions declare a nav kind, with an entry shape per kind #56329

Job	Run time
Lint · CI, release & engine gates	5m 14s
Type Check · consumer gates	11m 34s
Lint · docs & code guards	4m 18s
Lint · scoped · slot lookup & corpus	5m 45s
Schedule gate · skip when a green push run covers the commit	-1s
Type Check · workspace	15m 18s
Lint · ESLint	3m 6s
Type Check · debt ledger	8m 27s
Lint · repo & tooling gates	4m 42s
Lint · scoped · tooling self-tests	1m 20s
Lint · PM dispatch-gates	1m 28s
Type Check · source gates	4m 18s
Lint · scoped · query-options erasure	4m 55s
Lint & Repo Gates	3s
TypeScript Type Check	10s
	1h 10m 37s