When AI Writes the Code, Show Your Judgment

The author argues that detailed public case studies are becoming the way to demonstrate engineering judgment now that AI can produce working code, since an isolated finished product no longer proves the thinking behind it. The post illustrates this with an HVAC company project that extracted five years of past customers from Gmail .mbox exports using a Mastra workflow with Daytona sandboxes and DeepSeek, covering database design, deterministic versus AI filtering, evals, and scaling bottlenecks.