Testing

How rapid test growth exposed two kinds of flaky CI failures—and how we fixed them by restructuring MongoDB index setup and limiting CPU contention

Write failing tests first with Promptfoo eval, then fix your prompts to make them pass. TDD-style prompt engineering with a real Vision model debugging story.

Promptfoo, the LLM testing framework acquired by OpenAI. Prompt regression testing, model comparison, Red Teaming, and hands-on experience applying it to a real translation app.