> ## Documentation Index
> Fetch the complete documentation index at: https://docs.augmentcode.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Verifier

> Use the Verifier Expert to exercise a change in a running environment and report evidence-backed findings.

## Verifier

Verifier is a runtime validation Expert for pull requests or merge requests. It acquires or uses a test environment, serves the change, provisions the identities or flags needed to exercise it, runs an end-to-end verification pass, and reports findings with linked evidence.

Unlike a test runner that only returns pass or fail, Verifier focuses on merge confidence. It does not merge code or replace human judgment; it reports what it observed, what could not be observed, and what evidence supports the finding.

* **Best for**: Changes that need runtime evidence from a real app, service, integration, or workflow before a reviewer is comfortable merging.
* **How to use**: Start a session with Verifier and provide a change URL, or configure it to run from code-hosting events or an explicit rerun comment. During setup, define the target repositories, test environment, deploy or serve commands, auth and flag setup, observability sources, and reporting expectations.