# Backward-Compatible Change

> A technique for changing a contract only by additions that existing consumers can ignore.

Record: `lexicon:backward-compatible-change`
Kind: technique
Layer: [Contracts Core](https://banes-lab.com/records/layer/contracts-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lexicon-backward-compatible-change

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Coarse-Grained Endpoint](https://banes-lab.com/records/lexicon/coarse-grained-endpoint.md) and before [Compatibility Adapter](https://banes-lab.com/records/lexicon/compatibility-adapter.md).

## Category

- [Contracts / Interfaces / Compatibility](https://banes-lab.com/records/lexicon-category/contracts-interfaces-compatibility.md)

## Refactors

- [Distributed Monolith](https://banes-lab.com/records/architecture/distributed-monolith.md)
- [Cyclic Deployment Dependency](https://banes-lab.com/records/architecture/cyclic-deployment-dependency.md)

## Linked from

- [Anti-patterns](https://banes-lab.com/ontology/principles/architecture-category-anti-patterns.md)