# Contract Compatibility

> For APIs, services, data, schemas, and protocols, validate explicit contracts, preconditions, postconditions, invariants, versioning, backward compatibility, forward compatibility, and interoperability.

Record: `algorithms:contract-compatibility`
Kind: algorithm
Canonical: https://banes-lab.com/ontology/algorithms#algorithms-contract-compatibility
Closure: https://banes-lab.com/json/records/algorithms/contract-compatibility/closure

Listed in [Algorithm contracts](https://banes-lab.com/api/records/algorithms.md), after [Modular Boundary Compliance](https://banes-lab.com/records/algorithms/modular-boundary-compliance.md) and before [Canonical Semantics](https://banes-lab.com/records/algorithms/canonical-semantics.md).

## Domain

- [Architecture relationships](https://banes-lab.com/records/algorithms-domain/arch-relationships.md)

## Tier

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

## Composed by

- [Loop-Owned Mode Selection](https://banes-lab.com/records/algorithms/loop-owned-mode-selection.md)
- [<Mode-Driven Response Schema>](https://banes-lab.com/records/algorithms/mode-driven-response-schema.md)

## Math type

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

## Force

- [Architecture evolution](https://banes-lab.com/records/force/architecture-evolution.md)
- [Contract compatibility](https://banes-lab.com/records/force/contract-compatibility.md)
- [Correctness verification](https://banes-lab.com/records/force/correctness-verification.md)

## Contract of

- [Contract Compatibility](https://banes-lab.com/records/lexicon/contract-compatibility.md)

## Linked from

- [Core Modular Design](https://banes-lab.com/ontology/lexicon/lexicon-category-core-modular-design.md)
- [Mode-driven response schema](https://banes-lab.com/ontology/algorithms/algorithms-domain-mode-driven-response-schema.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)
- [The forces](https://banes-lab.com/ontology/schema/the-forces.md)