📝 Does Your AI Agent Actually Work? A Guide to Eval-Driven Development You can vibe-code your way to an app that is capable, but you can’t vibe-test and call it a day. Tweaking prompts and trying a few inputs by hand only gets you so far; evals are what get your agents ready for deployment and keep them working once they’re live. Teams often ask which eval tool to use, and there are plenty of useful ones: Langfuse, Braintrust, and LangSmith, to name a few. But no tool can tell you what your…