---
title: "Evals as evidence"
description: "The principle that the eval run is the assurance evidence: a failing eval blocks the build and its structured result is stored as proof the control fired."
canonical: https://aigovernanceengineer.com/glossary/evals-as-evidence
author: "Jorge García Aibar"
license: "CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/)"
doi: https://doi.org/10.5281/zenodo.22956197
version: "0.5.0"
updated: 2026-09-24
---

# Evals as evidence

The principle that the eval run is the assurance evidence: a failing eval blocks the build and its structured result is stored as proof the control fired.

- Developed in: [ch. 03, 2. Evals fail builds; reviews only recommend](https://aigovernanceengineer.com/bok/values-and-principles#2-evals-fail-builds-reviews-only-recommend)
- Chapters: [ch. 03, Values & Principles](https://aigovernanceengineer.com/bok/values-and-principles) · [ch. 04, The Stack](https://aigovernanceengineer.com/bok/the-stack)
- In the glossary chapter: https://aigovernanceengineer.com/bok/glossary#t-evals-as-evidence

## Sources

Defined by this Body of Knowledge: the section it is developed in is the source.