---
title: 'Verification gate'
description: 'A control point that blocks promotion until required evidence has been produced and validated.'
canonical_url: 'https://darkfactory.dev/glossary/verification-gate'
markdown_url: 'https://darkfactory.dev/glossary/verification-gate.md'
collection: glossary
date_published: '2026-08-03T00:00:00-04:00'
date_modified: '2026-08-26T00:00:00-04:00'
---

# Verification gate


## Definition

A verification gate is a control point that blocks promotion until required evidence has been produced and validated. Promotion might mean accepting an answer, merging code, deploying a model, sending a message, or granting an agent more authority.

The gate needs explicit admission criteria, trusted evidence inputs, a clear pass or fail outcome, and an audit record. It should fail closed when required evidence is missing or the verifier is unavailable, unless a separately authorized exception path applies.

Place enforcement at the transition being protected. A model instruction that says "do not deploy without tests" is guidance. A deployment service that rejects an unsigned verification record is a gate.

## Distinguish it from nearby terms

A grader emits a judgment. A review informs a person. A verification gate enforces the admission decision. A guardrail is broader and may advise, detect, block, contain, or recover.

## Check your understanding

An agent can edit the test, mark it passed, and set the deployment flag. The workflow contains a check, but not an independent gate because the producer controls the evidence and the transition.

## Also called

quality gate, promotion gate

## Related factory areas

- [Verification, evaluation & quality truth](https://darkfactory.dev/factory/verification)
- [Integration, review & change control](https://darkfactory.dev/factory/integration-review)

## Evidence and further reading

- [Viverra: Text-to-Code with Guarantees](https://arxiv.org/abs/2605.14972)
- [Can Human Developers Detect AI Agent Sabotage?](https://arxiv.org/abs/2606.05647)