# Building AX evals that actually work

DevFeed: [Building AX evals that actually work](<https://devfeed.tech/articles/building-ax-evals-that-actually-work-23828.md>)

Original publisher: [Read original article](<https://devblogs.microsoft.com/blog/building-ax-evals-that-actually-work/>)

Author: Waldek Mastykarz

Published: 2026-07-15T12:53:13Z

Content type: tutorial

Language: en

Sources: [Developer Blogs](<https://devfeed.tech/sources/developer-blogs.md>)

Topics: [AI-assisted coding](<https://devfeed.tech/topics/ai-assisted-coding.md>), [Loop Engineering](<https://devfeed.tech/topics/loop-engineering.md>), [Prompt Engineering](<https://devfeed.tech/topics/prompt-engineering.md>)

Tags: [agent-experience](<https://devfeed.tech/tags/agent-experience.md>), [ai](<https://devfeed.tech/tags/ai.md>), [ai-coding-agents](<https://devfeed.tech/tags/ai-coding-agents.md>), [article](<https://devfeed.tech/tags/article.md>), [ax](<https://devfeed.tech/tags/ax.md>), [coding-agents](<https://devfeed.tech/tags/coding-agents.md>), [evals](<https://devfeed.tech/tags/evals.md>), [evaluation](<https://devfeed.tech/tags/evaluation.md>), [how-to](<https://devfeed.tech/tags/how-to.md>), [microsoft](<https://devfeed.tech/tags/microsoft.md>), [microsoft-for-developers](<https://devfeed.tech/tags/microsoft-for-developers.md>), [quality](<https://devfeed.tech/tags/quality.md>)

## AI overview

This eighth and final article in a series about Agent Experience explains how to build meaningful evaluations for AI coding agents. It identifies representative prompts, accurate and unambiguous criteria, and other structural decisions needed to produce useful signal rather than misleading scores.

## Source excerpt

This is the eighth and final article in a series about Agent Experience (AX): the practice of making AI coding agents work correctly with your technology. The series covers what you can and can't control in the agent stack, how to measure whether your extensions are helping or hurting, and how to iterate toward better [...] The post Building AX evals that actually work appeared first on Microsoft for Developers.