// Package check is the checker's logic (novox/hq ADR 0484, ADR 0453 clause 4, ADR 0447, ADR 0444), apart from the bus: the
// claim of a verdict key, the judging of a pull request's head merged onto its trunk through the build modules' fetch,
// digest and test steps, the kept verdicts, the line of the status and the act the forge bridge performs. The bus is
// reached through the small interfaces here, so each part is tested with fakes. The checker runs dark: nothing reads its
// answers to merge or deliver (ADR 0453 clause 4).
package check