# Implementation-Specific Contracts

> Defining an interface around one implementation's quirks, so no alternative can satisfy it.

Record: `lexicon:implementation-specific-contracts`
Kind: anti-pattern
Layer: [Structural Core](https://banes-lab.com/records/layer/structural-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lexicon-implementation-specific-contracts

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Exposed Internals](https://banes-lab.com/records/lexicon/exposed-internals.md) and before [Leaky Abstraction](https://banes-lab.com/records/lexicon/leaky-abstraction.md).

## Category

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

## Negated 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)