The dependency relation is derived after the store is stamped, so an interrupted boot leaves a warm store ordering alphabetically

GraphitronModelStore.openAt creates a file-backed store in three steps, in this order: execute the DDL, write the store_stamp row, derive meta_materialize_dependency from the stored view definitions. A later boot decides the file is warm by reading that stamp alone, and a warm boot deliberately skips the derivation, on the sound argument that the rows are a function of the DDL the stamp names. The order of the last two steps is what leaves a hole: a process that dies between the stamp and the derivation leaves a file every later boot accepts as warm with a dependency relation that is empty rather than derived. Nothing fails; the refresh order simply falls back to the alphabetical identity case, which is exactly the quiet wrong answer the derived order exists to prevent, and it survives every subsequent boot because the stamp says the store is complete. The window is two statements wide and the shipped DDL registers no dependent derivation, so today there are no edges to lose; the first registration whose view reads another registration’s target makes it real. Deriving before stamping closes it outright, the stamp then meaning "this file holds everything a created store holds" rather than "the DDL ran". Worth checking in the same pass whether anything else has accumulated behind the stamp, and whether the stamp write belongs at the end of creation as a matter of rule rather than as a fix to one caller.

A second, smaller observation from the same review, recorded here so it is not lost rather than because it needs the same fix: MaterializeRegistryGateTest.theRefreshOrderRespectsEveryDependencyRow is vacuous on the shipped DDL. With zero rows in the relation it has nothing to violate, and it passes with the topological sort bypassed. That is honest and the class says so, the production evidence being `FactSchemaGateTest.everyMaterializedTargetEqualsItsRule’s synthetic registration instead; but a gate that cannot fail is worth either a fixture of its own or a note saying which other case carries its weight.