Dev Proxy for local agent request emulation
Emulate agent request responses locally to test changes without deploying.
Dev Proxy
Intercepting agent requests and returning modified responses locally to test changes to documentation or server responses without deploying to production.
Free
https://devblogs.microsoft.com/blog/how-to-test-agent-experience-changes-without-shipping-them
Dev Proxy is a tool used to intercept agent requests locally. It allows developers to return modified responses, effectively emulating changes to documentation or server responses. This enables testing hypotheses about agent behavior without deploying to a live environment.
- How to test agent experience changes without shipping them ↗Microsoft for Developers · Microsoft for Developers · Jul 21, 2026 · paraphrased
First seen on Subvolts Jul 21, 2026. Updated Sep 11, 2026. Spotted a problem? Tell us.
- How to test agent experience changes without shipping themMicrosoft · Microsoft for Developers · Jul 21, 2026
The Playbook: reusable how-tos, prompts, configs and tips pulled out of the news.
- ChecklistAX Practitioner Playbook Evaluation Quality ChecklistReview your AI agent evaluation process before running it to ensure its quality and trustworthiness. · 30 min
- WorkflowBuild and test an AI agent using Microsoft Foundry ToolkitCreate, configure, test, and evaluate an AI agent within VS Code. · 60 min
- ChecklistAI agent evaluation setup and execution checklistSteps to set up and run evaluations for your AI agent. · 20 min
- ChecklistChecklist for production-ready AI agent refactoringSteps to ensure an AI agent is production-ready after refactoring. · 20 min
- Anti-patternLetting Models Write Evaluation CriteriaAvoid having AI models generate your evaluation criteria for AI agent performance. · 10 min
- HeuristicDon't Wait for Models to Improve for Your TechActively improve AI agent performance by controlling their information sources. · 15 min
Questions people ask
- Which AI tools does this work with?
- Any current model. It was seen with Copilot in the sources.
- Where did this come from?
- Microsoft for Developers (Microsoft for Developers). Subvolts collected, normalized and credited it; the link above opens the original.

