# Contract Compatibility

> The requirement that every alternative implementation fully honor the same interface contract.

Record: `lexicon:contract-compatibility`
Kind: constraint
Layer: [Structural Core](https://banes-lab.com/records/layer/structural-core.md)
Aliases: Interface Conformance
Canonical: https://banes-lab.com/ontology/lexicon#lexicon-contract-compatibility

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Canonical Source](https://banes-lab.com/records/lexicon/canonical-source.md) and before [Explicit Interfaces](https://banes-lab.com/records/lexicon/explicit-interfaces.md).

## Category

- [Core Modular Design](https://banes-lab.com/records/lexicon-category/core-modular-design.md)

## Contract

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

## Required by

- [Interchangeability](https://banes-lab.com/records/architecture/interchangeability.md)

## Linked from

- [Core Modular Design](https://banes-lab.com/ontology/principles/architecture-category-core-modular-design.md)