# Contracts Core

> The rules governing interfaces and contracts — explicit typed boundaries, versioned change, no implicit or breaking contracts.

Record: `algorithms:contracts-core`
Kind: algorithm
Layer: [Contracts Core](https://banes-lab.com/records/layer/contracts-core.md)
Canonical: https://banes-lab.com/ontology/algorithms#algorithms-contracts-core
Closure: https://banes-lab.com/json/records/algorithms/contracts-core/closure

Listed in [Algorithm contracts](https://banes-lab.com/api/records/algorithms.md), after [Performance Core](https://banes-lab.com/records/algorithms/performance-core.md) and before [Causality Core](https://banes-lab.com/records/algorithms/causality-core.md).

## Domain

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

## Tier

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

## Principle

- [Explicit Contracts](https://banes-lab.com/records/architecture/explicit-contracts.md)

## Composed by

- [Design By Contract Over Implicit Contract](https://banes-lab.com/records/algorithms/no-implicit-contract.md)
- [Versioned Evolution Over Breaking Change](https://banes-lab.com/records/algorithms/no-breaking-change.md)
- [Schema-Validated Boundary Over Untyped](https://banes-lab.com/records/algorithms/no-untyped-boundary.md)

## Contract of

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

## Linked from

- [Contracts / Interfaces / Compatibility](https://banes-lab.com/ontology/principles/architecture-category-contracts-interfaces-compatibility.md)
- [Architectural Rules](https://banes-lab.com/ontology/algorithms/algorithms-domain-architectural-rules.md)
- [Domain tiers](https://banes-lab.com/ontology/schema/the-vocabulary-domain-tier.md)
- [The layer topology](https://banes-lab.com/ontology/schema/the-layer-topology.md)