# Architecture principles whose scope is boundary

> 4 records

This index as JSON: https://banes-lab.com/json/api/facets/architecture/scope/boundary

## Entries

- [Defensive Programming](https://banes-lab.com/records/architecture/defensive-programming.md): A design rule that code checks its inputs and assumptions before acting on them, and reports a violation as an explicit error.
- [Adapter Pattern](https://banes-lab.com/records/architecture/adapter-pattern.md): A design pattern that wraps a component with an incompatible interface so it implements the interface its callers expect.
- [Input Validation](https://banes-lab.com/records/architecture/input-validation.md): A mechanism that checks external input against a schema at the boundary before core logic uses it.
- [Controlled Side Effects](https://banes-lab.com/records/architecture/controlled-side-effects.md): A design rule that mutation, I/O and persistence happen at declared boundaries, around a core of pure functions.