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Dev.to
8/3/2026
The original title is "Using DeepEval and Cursor to add regression tests for AI app prompts"

The original title is "Using DeepEval and Cursor to add regression tests for AI app prompts"

Original: I have been Vibecoding Evals (works better than I thought)

Short summary

A practical walkthrough of using Cursor and DeepEval to add evaluation tests to an AI support-triage app. The author shows how golden test cases catch behavioral bugs that pass manual testing, demonstrates a fix-test-rerun cycle, and explains why evals provide a regression checklist for prompt changes. Includes real failure examples and the complete workflow from dataset creation to passing tests.

  • •Demonstrates adding DeepEval evals to an AI support-triage app via Cursor, catching a misclassification bug that manual testing missed
  • •Shows a build-test-fix-rerun workflow where golden test cases act as a regression checklist for prompt changes
  • •Includes real JSON test cases and explains how policy-based metrics validate both output correctness and decision rationale

Generated with AI, which can make mistakes.

#ai-tools#ai-agents#open-source
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