# Strict Fragile Parsers

> Parsers that reject any input deviating from an exact expectation, breaking on benign additions.

Record: `lexicon:strict-fragile-parsers`
Kind: anti-pattern
Layer: [Contracts Core](https://banes-lab.com/records/layer/contracts-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lexicon-strict-fragile-parsers

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Silent Breaking Changes](https://banes-lab.com/records/lexicon/silent-breaking-changes.md) and before [Undefined Results](https://banes-lab.com/records/lexicon/undefined-results.md).

## Category

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

## Negated by

- [Forward Compatibility](https://banes-lab.com/records/architecture/forward-compatibility.md)

## Linked from

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