> ## Documentation Index
> Fetch the complete documentation index at: https://docs.exterview.ai/llms.txt
> Use this file to discover all available pages before exploring further.
# How to Freeze the Configuration Contract
> Review, sign off, and lock in your configuration into a versioned Configuration Contract.
**Core.** Freezing is the sign-off step. Your decisions become a versioned, signed Configuration Contract that every evaluation score traces back to.
## Purpose
A frozen contract makes evaluation reproducible and auditable, and controls how changes happen afterward.
For larger enterprise contracts, freezing isn't a simple one-click step
available right away. It's a milestone: your team first runs a practice period
of roughly 100 test interviews across a handful of roles, and the Exterview
team gives final sign-off, before the configuration is frozen. See
[Go-live](/guides/setup-go-live) for how the practice period works.
## Steps
Review Foundation, Operations, and Governance decisions in one place.
Confirm who owns each decision, for traceability.
The customer and Exterview signatories sign the contract.
The configuration is frozen and assigned a version.
Learn how post-freeze changes go through change control and may re-baseline the version.