# Schema-Validated Boundary Over Untyped

> Type and schema-validate every boundary crossing, so invalid state cannot enter the typed core.

Record: `algorithms:no-untyped-boundary`
Kind: algorithm
Canonical: https://banes-lab.com/ontology/algorithms#algorithms-no-untyped-boundary
Closure: https://banes-lab.com/json/records/algorithms/no-untyped-boundary/closure

Listed in [Algorithm contracts](https://banes-lab.com/api/records/algorithms.md), after [Versioned Evolution Over Breaking Change](https://banes-lab.com/records/algorithms/no-breaking-change.md) and before [Atomic Boundary Over Partial Commit](https://banes-lab.com/records/algorithms/no-partial-commit.md).

## Domain

- [Architectural Rules](https://banes-lab.com/records/algorithms-domain/architectural-rules.md)

## Tier

- [leaf](https://banes-lab.com/records/vocabulary/domain-tier-leaf.md)

## Composes

- [Contracts Core](https://banes-lab.com/records/algorithms/contracts-core.md)
- [Correctness Core](https://banes-lab.com/records/algorithms/correctness-core.md)

## Math type

- [Logic](https://banes-lab.com/records/reasoning/math-type-logic.md)

## Linked from

- [Architectural Clusters](https://banes-lab.com/ontology/algorithms/algorithms-domain-architectural-clusters.md)
- [The mathematics](https://banes-lab.com/ontology/reasoning/the-mathematics.md)
- [Domain tiers](https://banes-lab.com/ontology/schema/the-vocabulary-domain-tier.md)