# Stable Interfaces / Evolution Speed

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

Record: `tension:evolution-speed-stable-interfaces`
Kind: tension
Canonical: https://banes-lab.com/ontology/schema#tension-evolution-speed-stable-interfaces

## tensions-with

- [Stable Interfaces](https://banes-lab.com/records/arch/stable-interfaces.md)
- [Evolution Speed](https://banes-lab.com/records/lex/evolution-speed.md)