# Preconditions / Permissive APIs

> "preconditions" (contracts-core layer) is traded against "Permissive APIs" (contracts-core layer) — a principle cannot be scope-separated from a quality, metric, or cost it competes with; resolve by measuring "Permissive APIs" and choosing an explicit operating point.

Record: `tension:permissive-apis-preconditions`
Kind: tension
Canonical: https://banes-lab.com/ontology/schema#tension-permissive-apis-preconditions

## tensions-with

- [Preconditions](https://banes-lab.com/records/arch/preconditions.md)
- [Permissive APIs](https://banes-lab.com/records/lex/permissive-apis.md)