Resilient AI End-to-End Tests with Stagehand and Convex

Instead of relying on brittle selectors that break with minor UI changes, a more resilient testing strategy uses an AI agent to navigate applications based on natural language instructions. This setup pairs the AI browser agent Stagehand with an ephemeral Convex backend, which provides a clean, isolated database for every single test run. By describing user intent like "click the buy button," tests become more durable and less concerned with implementation details. This workflow allows developers to seed precise data for each scenario, extract structured results for assertions, and even watch video recordings of failed tests to see exactly what the AI agent did.