# What is a drift in Provely?

> A change in a provider schema, docs, or behaviour that can change a contract. The Provely definition, with an example.

Canonical: https://provely.sh/glossary/drift  
Last reviewed: 2026-09-05  

**Drift is a change in a provider schema, documentation, or behaviour. The drift monitor fingerprints the sources, classifies each change, recompiles only the affected contracts, and signs a new skill version.**

## Read next

- [Read the definition of Service verification skill](https://provely.sh/glossary/skill)
- [Read the definition of Conformance](https://provely.sh/glossary/conformance)
- [See every glossary term](https://provely.sh/glossary)
- [Read how Provely works](https://provely.sh/how-it-works)